NOAA/NWS · 实时热榜

* WHAT...Dangerously hot and humid conditions. Afternoon temperatures 106 to 118 expected. Major to Extreme Heat Risk. * WHERE...Portions of southwest Arizona and southeast California. * WHEN...Until 8 PM MST /8 PM PDT/ Saturday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Overexposure can cause heat cramps and heat exhaustion to develop and, without intervention, can lead to heat stroke. Safety instructions: An Extreme Heat Warning means that a period of very hot temperatures, even by local standards, will occur. Actions should be taken to lessen the impact of the extreme heat. Take extra precautions if you work or spend time outside. When possible, reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose-fitting clothing when possible and drink plenty of water. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. Public cooling shelters are available in some areas. Consult county officials for more details.

* WHAT...Dangerously hot conditions. Afternoon temperatures 105 to 116 expected. Major to Extreme Heat Risk. * WHERE...Aguila Valley, Apache Junction/Gold Canyon, Cave Creek/New River, Fountain Hills/East Mesa, Gila Bend, Northwest Pinal County, Sonoran Desert Natl Monument, Tonopah Desert, New River Mesa, Rio Verde/Salt River, and Superior. * WHEN...Until 8 PM MST Saturday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Overexposure can cause heat cramps and heat exhaustion to develop and, without intervention, can lead to heat stroke. * ADDITIONAL DETAILS...In Maricopa County, call 2-1-1 to find a free cooling center, transportation, water and more. https://www.maricopa.gov/heat Safety instructions: An Extreme Heat Warning means that a period of very hot temperatures, even by local standards, will occur. Actions should be taken to lessen the impact of the extreme heat. Take extra precautions if you work or spend time outside. When possible, reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose-fitting clothing when possible and drink plenty of water. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. Public cooling shelters are available in some areas. Consult county officials for more details.

* WHAT...Dangerously hot conditions. Afternoon temperatures 108 to 116 expected. Major to Extreme Heat Risk. * WHERE...The Phoenix metropolitan area. * WHEN...Until 8 PM MST Saturday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Overexposure can cause heat cramps and heat exhaustion to develop and, without intervention, can lead to heat stroke. * ADDITIONAL DETAILS...In Maricopa County, call 2-1-1 to find a free cooling center, transportation, water and more. https://www.maricopa.gov/heat Safety instructions: An Extreme Heat Warning means that a period of very hot temperatures, even by local standards, will occur. Actions should be taken to lessen the impact of the extreme heat. Take extra precautions if you work or spend time outside. When possible, reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose-fitting clothing when possible and drink plenty of water. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. Public cooling shelters are available in some areas. Consult county officials for more details.

* WHAT...Dangerously hot conditions. Afternoon temperatures 104 to 113 expected. Major to Extreme Heat Risk. * WHERE...San Carlos. * WHEN...Until 8 PM MST Saturday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Overexposure can cause heat cramps and heat exhaustion to develop and, without intervention, can lead to heat stroke. Safety instructions: An Extreme Heat Warning means that a period of very hot temperatures, even by local standards, will occur. Actions should be taken to lessen the impact of the extreme heat. Take extra precautions if you work or spend time outside. When possible, reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose-fitting clothing when possible and drink plenty of water. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. Public cooling shelters are available in some areas. Consult county officials for more details.

* WHAT...For the Heat Advisory, temperatures up to 99 expected. For the Extreme Heat Watch, dangerously hot conditions with temperatures up to 104 possible. * WHERE...Cuyama Valley. * WHEN...For the Heat Advisory, from 10 AM this morning to 10 AM PDT Tuesday. For the Extreme Heat Watch, from Tuesday morning through Friday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Hot temperatures may cause heat illnesses. Safety instructions: Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

* WHAT...For the Heat Advisory, temperatures up to 107 expected. For the Extreme Heat Watch, dangerously hot conditions with temperatures up to 112 possible. * WHERE...A portion of southwest California. * WHEN...For the Heat Advisory, from 10 AM this morning to 10 AM PDT Tuesday. For the Extreme Heat Watch, from Tuesday morning through Friday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Safety instructions: Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

* WHAT...For the Heat Advisory, temperatures up to 94 expected. For the Extreme Heat Watch, dangerously hot conditions with temperatures up to 100 possible. * WHERE...Catalina and Santa Barbara Islands, Los Angeles County Beaches, Los Angeles County Inland Coast including Downtown Los Angeles, Malibu Coast, Palos Verdes Hills, Santa Barbara County Southeastern Coast, Santa Barbara County Southwestern Coast, Ventura County Beaches, and Ventura County Inland Coast. * WHEN...For the Heat Advisory, from 10 AM this morning to 10 AM PDT Tuesday. For the Extreme Heat Watch, from Tuesday morning through Friday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Hot temperatures may cause heat illnesses. Safety instructions: Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

* WHAT...Dangerously hot conditions with temperatures up to 112 possible. * WHERE...Antelope Valley, Eastern Antelope Valley Foothills, and Western Antelope Valley Foothills. * WHEN...From Tuesday morning through Friday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Safety instructions: Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

* WHAT...Dangerously hot conditions with temperatures up to 115 to 118 degrees expected through Death Valley and the lower Colorado River Valley, with highs between 107 to 110 degrees elsewhere. Near record warm low temperatures expected in urban areas. * WHERE...Lake Mohave, Lake Mead, Lower Colorado River Valley / Lake Havasu, Northwest Deserts, Death Valley National Park, and Las Vegas Valley. * WHEN...Until 8 PM PDT /8 PM MST/ this evening. * IMPACTS...Heat-related illnesses increase significantly during extreme heat events. Safety instructions: Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes. Take extra precautions when outside. Wear lightweight and loose-fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. Monitor the latest forecasts and warnings for updates.

* WHAT...Flash flooding and debris flows caused by excessive rainfall continue to be possible over the Aspen Acres burn scar. * WHERE...Aspen Acres Burn Scar. * WHEN...From 2 PM MDT this afternoon through this evening. * IMPACTS...Heavy rainfall over the Aspen Acres burn scar is expected up to and during the period of the watch. Residents near the Aspen Acres burn scar should prepare for potential debris flow. Be sure to stay up to date with information from local authorities. Heavy rainfall could trigger flash flooding of low-lying areas, street flooding, and debris flows in and near recent wildfire burn scars. * ADDITIONAL DETAILS... - National Weather Service Meteorologists are forecasting heavy rainfall over the Aspen Acres burn scar, which may lead to flash flooding and debris flows. - Some locations that may experience flash flooding include... Beulah, San Isabel and Highways 165 and 78 in and around the Aspen Acres Burn Scar. - http://www.weather.gov/safety/flood Safety instructions: You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.

* WHAT...Dangerously hot conditions with high temperatures ranging between 103 to 111 degrees and low temperatures 79 to 85 degrees. Major HeatRisk is expected through Tuesday and then widespread Major to Extreme HeatRisk Wednesday through Saturday. * WHERE...Pinal County, Tohono O'odham Nation, Tucson Metro Area, Upper Gila River Valley, and Western Pima County. * WHEN...Until 8 PM MST Saturday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Safety instructions: To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. Take extra precautions if you work or spend time outside. When possible, reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible and drink plenty of water.

* WHAT...Temperatures 90 to 97. * WHERE...San Bernardino County Mountains above 6000 ft. * WHEN...For the Heat Advisory, until 10 AM PDT Tuesday. For the Extreme Heat Watch, from Tuesday morning through Friday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Hot temperatures may cause heat illnesses. Safety instructions: Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

...THUNDERSTORMS, GUSTY WINDS, AND LOW RELATIVE HUMIDITY SATURDAY INTO SUNDAY... .A cold front will move through the region Saturday into Sunday, bringing a risk for thunderstorms and strong west to southwest winds. This will lead to critical fire weather conditions across the region. * Affected Area: Northern and Central Idaho Panhandle (Zone 101) and Selkirk Mountains of Northeast Washington (Zone 700). * Thunderstorms: Scattered showers and thunderstorms Saturday afternoon through Sunday morning. * Outflow Winds: Gusty outflow wind gusts up to 50 mph. * Impacts: Lightning strikes will have the potential to start new fires, and gusty and erratic outflow winds could cause rapid spread of new and existing wildfires. Safety instructions: A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior.

* WHAT...Temperatures 85 to 90. * WHERE...Orange County Coastal Areas and San Diego County Coastal Areas. * WHEN...From Tuesday morning through Friday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. * ADDITIONAL DETAILS...Overnight lows around 5 to 7 degrees above normal will limit relief from the heat, especially for those without adequate cooling. Safety instructions: Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

* WHAT...Dangerously hot conditions with temperatures up to 113 expected. * WHERE...The far southeastern Texas Panhandle and the northern Rolling Plains. * WHEN...From noon today to 8 PM CDT this evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Safety instructions: Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke.

* WHAT...Dangerously hot conditions with temperatures of 110 to 117. * WHERE...Coachella Valley, San Diego County Deserts, and San Gorgonio Pass near Banning. * WHEN...Until 8 PM PDT Friday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. * ADDITIONAL DETAILS...Overnight temperatures 5 to 8 degrees above normal will limit relief from the heat. Safety instructions: Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

...THUNDERSTORMS, GUSTY WINDS, AND LOW RELATIVE HUMIDITY SATURDAY INTO SUNDAY... .A cold front will move through the region Saturday into Sunday, bringing a risk for thunderstorms and strong west to southwest winds. This will lead to critical fire weather conditions across the region. * Affected Area: Foothills of Northeast Washington (Zone 701) and Eastern Columbia Basin -Palouse -Spokane Area (Zone 708). * Winds: Southwest 10 to 20 mph with gusts up to 30 mph. * Relative Humidities: 17 to 25 percent. * Thunderstorms: Isolated to scattered lightning will occur in two rounds. The first one will occur between 2 PM and 5 PM with the second round between 10 PM and 5 AM. Gusty outflow winds are expected near thunderstorms. * Outflow Winds: Gusty outflow wind gusts up to 50 mph. * Impacts: Rapid fire spread is possible with any new or ongoing fires. Lightning strikes will have the potential to start new fires with gusty outflow winds. Safety instructions: A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior.

* WHAT...Temperatures 90 to 98 for Inland Orange County, 90 to 102 for the San Diego County Valleys, 100 to 107 for the Inland Empire and 89 to 100 in the mountains. Temperatures increase slightly for the middle and end of next week, making for a prolonged and dangerous stretch of heat. * WHERE...Orange County Inland Areas, Riverside County Mountains, San Bernardino and Riverside County Valleys-The Inland Empire, San Diego County Mountains, San Diego County Valleys, and Santa Ana Mountains and Foothills. * WHEN...For the Heat Advisory, until 10 AM PDT Tuesday. For the Extreme Heat Watch, from Tuesday morning through Friday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Hot temperatures may cause heat illnesses. * ADDITIONAL DETAILS...Low temperatures 5 to 10 degrees above normal will limit relief from the heat. Increasing temperatures into the middle of next week will increase the threat of heat-related illness across populations. Safety instructions: Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

* WHAT...Dangerously hot conditions with temperatures up to 108 possible and limited nighttime cooling. * WHERE...Apple and Lucerne Valleys. * WHEN...From Tuesday morning through Friday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. * ADDITIONAL DETAILS...Low temperatures 5 to 10 degrees above normal will limit relief from the heat. Safety instructions: Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

* WHAT...For the Heat Advisory, temperatures up to 99 expected. For the Extreme Heat Watch, dangerously hot conditions with temperatures up to 104 possible. * WHERE...Cuyama Valley. * WHEN...For the Heat Advisory, from 10 AM Sunday to 10 AM PDT Tuesday. For the Extreme Heat Watch, from Tuesday morning through Friday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Hot temperatures may cause heat illnesses. Safety instructions: Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

* WHAT...Flooding on Duck Creek caused by excessive rainfall continues. * WHERE...North Central Washington County in southeastern Ohio... * WHEN...Until 800 AM EDT. * IMPACTS...At 13 feet, Main Street in Macksburg near the creek and agricultural fields adjacent to the creek flood. * ADDITIONAL DETAILS... - At 159 AM EDT, the gauge reading on Duck Creek at Macksburg was 13 feet and slowly rising. - Some locations that will experience flooding include... Macksburg. - http://www.weather.gov/safety/flood Safety instructions: Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Be especially cautious at night when it is harder to recognize the dangers of flooding.

* WHAT...For the Heat Advisory, temperatures up to 94 expected. For the Extreme Heat Watch, dangerously hot conditions with temperatures up to 100 possible. * WHERE...Catalina and Santa Barbara Islands, Los Angeles County Beaches, Los Angeles County Inland Coast including Downtown Los Angeles, Malibu Coast, Palos Verdes Hills, Santa Barbara County Southeastern Coast, Santa Barbara County Southwestern Coast, Ventura County Beaches, and Ventura County Inland Coast. * WHEN...For the Heat Advisory, from 10 AM Sunday to 10 AM PDT Tuesday. For the Extreme Heat Watch, from Tuesday morning through Friday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Hot temperatures may cause heat illnesses. Safety instructions: Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

* WHAT...Dangerously hot conditions with temperatures up to 112 possible. * WHERE...Antelope Valley, Eastern Antelope Valley Foothills, and Western Antelope Valley Foothills. * WHEN...From Tuesday morning through Friday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Safety instructions: Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

* WHAT...Dangerously hot conditions with heat index values up to 113 expected. * WHERE...Portions of southeast, southern, southwest, and western Oklahoma and northern Texas. * WHEN...From noon to 8 PM CDT Sunday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. Safety instructions: Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes.

* WHAT...Dangerously hot conditions with temperatures up to 117. * WHERE...Coachella Valley, San Diego County Deserts, and San Gorgonio Pass near Banning. * WHEN...Until 8 PM PDT Friday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. * ADDITIONAL DETAILS...Overnight temperatures 5 to 8 degrees above normal will limit relief from the heat. Safety instructions: Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

* WHAT...Temperatures 90 to 98 for Inland Orange County, 90 to 102 for the San Diego County Valleys, 100 to 107 for the Inland Empire and 89 to 100 in the mountains. Temperatures increase slightly for the middle and end of next week, making for a prolonged and dangerous stretch of heat. * WHERE...Orange County Inland Areas, Riverside County Mountains, San Bernardino and Riverside County Valleys-The Inland Empire, San Diego County Mountains, San Diego County Valleys, and Santa Ana Mountains and Foothills. * WHEN...For the Heat Advisory, until 10 AM PDT Tuesday. For the Extreme Heat Watch, from Tuesday morning through Friday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Hot temperatures may cause heat illnesses. * ADDITIONAL DETAILS...Low temperatures 5 to 10 degrees above normal will limit relief from the heat. Increasing temperatures into the middle of next week will increase the threat of heat-related illness across populations. Safety instructions: Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

* WHAT...Temperatures in the mid to upper 90s below 5000 ft MSL. * WHERE...San Bernardino County Mountains. * WHEN...For the Heat Advisory, until 10 AM PDT Tuesday. For the Extreme Heat Watch, from Tuesday morning through Friday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Hot temperatures may cause heat illnesses. Safety instructions: Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

* WHAT...Dangerously hot conditions with temperatures up to 93 possible. * WHERE...Orange County Coastal Areas and San Diego County Coastal Areas. * WHEN...From Tuesday morning through Friday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. * ADDITIONAL DETAILS...Overnight lows around 5 to 7 degrees above normal will limit relief from the heat, especially for those without adequate cooling. Safety instructions: Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

* WHAT...Dangerously hot conditions with temperatures up to 108 possible and limited nighttime cooling. * WHERE...Apple and Lucerne Valleys. * WHEN...From Tuesday morning through Friday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. * ADDITIONAL DETAILS...Low temperatures 5 to 10 degrees above normal will limit relief from the heat. Safety instructions: Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

* WHAT...Dangerously hot conditions with temperatures up to 107 and heat index values up to 110 are expected Sunday afternoon. Temperatures up to 105 are expected Monday through Wednesday. * WHERE...Bastrop, Burnet, Caldwell, Fayette, Gonzales, Lavaca, Lee, Llano, Travis, and Williamson Counties. * WHEN...For the Extreme Heat Warning, until 7 PM CDT Sunday. For the Heat Advisory, from 7 PM Sunday to 7 PM CDT Wednesday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. Hot temperatures and high humidity may cause heat illnesses. Safety instructions: Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1.

* WHAT...Dangerously hot conditions with high temperatures up to 109 expected. * WHERE...North and Central Texas. * WHEN...From noon to 9 PM CDT Sunday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. Safety instructions: Take extra precautions when outside by staying hydrated, wearing lightweight and loose fitting clothing, and limiting strenuous activities to the early morning or evening. Check up on relatives and neighbors. Never leave young children or pets in an enclosed vehicle, even for a short time, as temperatures can quickly rise to life-threatening levels. Know the signs and symptoms of heat exhaustion and heat stroke. To reduce risk when outdoors, the occupational safety and health administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 911 ASAP if you or someone you know is exhibiting signs of heat stroke. Extreme heat is dangerous, especially for those without reliable shelter. Limit time outdoors during the hottest time of the day, typically from 2 to 7 PM, rest in the shade when possible, and drink plenty of water. Locate nearby cooling centers through local resources or dial 2-1-1 in Texas.

...SCATTERED THUNDERSTORMS WITH LIGHTNING EXPECTED ACROSS PORTIONS OF SOUTHWEST IDAHO DISTRICTS... * AFFECTED AREA...In Idaho, Fire Weather Zones 401 Western Payette National Forest, 402 Eastern Payette National Forest, 403 Northern Boise National Forest, 421 Southern Boise/Western Sawtooth NF, including the Camas Prairie, 424 Western Twin Falls BLM and 426 Southern Highlands. * TIMING...Until midnight MDT tonight. * THUNDERSTORMS...Scattered coverage with abundant lightning. * OUTFLOW WINDS...Gusty erratic winds up to 50 mph. * IMPACTS...Any fire that develops will catch and spread quickly. Outdoor burning is not recommended. Safety instructions: A Red Flag Warning means that critical fire weather conditions are either occurring now, or will occur shortly.

At 528 AM EDT, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Between 2.5 and 3.5 inches of rain have fallen. The expected rainfall rate is 1 to 2 inches in 1 hour. Additional rainfall amounts of 0.5 to 1.5 inches are possible in the warned area. Flash flooding is ongoing or expected to begin shortly. HAZARD...Flash flooding caused by thunderstorms. SOURCE...Radar. IMPACT...Flooding of small creeks and streams, urban areas, highways, streets, and underpasses as well as other drainage and low lying areas. Some locations that may experience flash flooding include... Vineland, Millville, Cumberland, Laurel Lake, Dividing Creek, Port Norris, Mauricetown, Newport, Port Elizabeth, Bricksboro, Fortesque and Cedarville. Safety instructions: Turn around...don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Be especially cautious at night when it is harder to recognize the dangers of flooding. Please report observed flooding to local emergency services or law enforcement and request they pass this information to the National Weather Service when you can do so safely.

* WHAT...Dangerously hot conditions with temperatures up to 110 expected. * WHERE...Collingsworth and Donley Counties. * WHEN...From noon to 8 PM CDT Sunday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. Safety instructions: Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. Stay cool, stay hydrated, stay informed.

* WHAT...Dangerously hot conditions with temperatures up to 110 expected. * WHERE...Palo Duro Canyon State Park. * WHEN...From noon to 8 PM CDT Sunday. * IMPACTS...Heat related illnesses increase significantly during extreme heat. Safety instructions: Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. Stay cool, stay hydrated, stay informed.

* WHAT...Dangerously hot conditions with high temperatures up to 109 expected. * WHERE...North and Central Texas. * WHEN...From noon to 9 PM CDT Sunday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. Safety instructions: Take extra precautions when outside by staying hydrated, wearing lightweight and loose fitting clothing, and limiting strenuous activities to the early morning or evening. Check up on relatives and neighbors. Never leave young children or pets in an enclosed vehicle, even for a short time, as temperatures can quickly rise to life-threatening levels. Know the signs and symptoms of heat exhaustion and heat stroke. To reduce risk when outdoors, the occupational safety and health administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 911 ASAP if you or someone you know is exhibiting signs of heat stroke. Extreme heat is dangerous, especially for those without reliable shelter. Limit time outdoors during the hottest time of the day, typically from 2 to 7 PM, rest in the shade when possible, and drink plenty of water. Locate nearby cooling centers through local resources or dial 2-1-1 in Texas.

* WHAT...Dangerously hot conditions with temperatures up to 113 expected. * WHERE...The far southeastern Texas Panhandle and the northern Rolling Plains. * WHEN...From noon to 8 PM CDT Sunday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Safety instructions: Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke.

FFWPIH The National Weather Service in Pocatello has issued a * Flash Flood Warning for... The Big Rock burn scar in... Southeastern Jefferson County in southeastern Idaho... South Central Madison County in southeastern Idaho... * Until 1100 PM MDT. * At 807 PM MDT, Doppler radar indicated thunderstorms producing heavy rain over the Big Rock Burn Scar. The expected rainfall rate is 0.25 to 0.5 inches in 1 hour. Flash flooding is ongoing or expected to begin shortly. Excessive rainfall over the burn scar will result in debris flow moving through the Big Rock burn scar. The debris flow can consist of rock, mud, vegetation and other loose materials. HAZARD...Life threatening flash flooding. Thunderstorms producing flash flooding in and around the Big Rock Burn Scar. SOURCE...Radar indicated. IMPACT...Life threatening flash flooding of areas in and around the Big Rock Burn Scar. * Some locations that will experience flash flooding include... Heise. Safety instructions: This is a life threatening situation. Heavy rainfall will cause extensive and severe flash flooding of creeks...streams...and ditches in the Big Rock Burn Scar. Severe debris flows can also be anticipated across roads. Roads and driveways may be washed away in places. If you encounter flood waters...climb to safety.

* WHAT...For the Heat Advisory, temperatures up to 107 expected. For the Extreme Heat Watch, dangerously hot conditions with temperatures up to 112 possible. * WHERE...A portion of southwest California. * WHEN...For the Heat Advisory, from 10 AM Sunday to 10 AM PDT Tuesday. For the Extreme Heat Watch, from Tuesday morning through Friday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Safety instructions: Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

FFWBUF The National Weather Service in Buffalo has extended the * Flash Flood Warning for... Central Chautauqua County in western New York... * Until 1230 PM EDT. * At 904 AM EDT, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Between 3 and 5 inches of rain have fallen. Additional rainfall amounts of 1.5 to 3 inches are possible in the warned area. Flash flooding is ongoing or expected to begin shortly. HAZARD...Life threatening flash flooding. Thunderstorms producing flash flooding. SOURCE...Radar indicated. IMPACT...Life threatening flash flooding of creeks and streams, urban areas, highways, streets and underpasses. * Some locations that will experience flash flooding include... Dunkirk, Fredonia, Westfield, Silver Creek, Mayville, Lake Erie State Park, SUNY Fredonia, Chautauqua Institution, Findley Lake, Chautauqua, Portland, Sheridan, Ripley, Stockton, Brocton, Mina, Arkwright, Sherman, Forestville and Cassadaga. Safety instructions: Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Be aware of your surroundings and do not drive on flooded roads. Flooding is occurring or is imminent. It is important to know where you are relative to streams, rivers, or creeks which can become killers in heavy rains. Campers and hikers should avoid streams or creeks.

* WHAT...Flooding caused by excessive rainfall is expected. * WHERE...Berkeley County in southeastern South Carolina... Charleston County in southeastern South Carolina... Dorchester County in southeastern South Carolina... * WHEN...Until 300 AM EDT. * IMPACTS...Several structures are flooded and some sand bagging operations are continuing. It will take several hours for all the water from these storms to work through local drainage systems in urban areas. * ADDITIONAL DETAILS... - At 1002 PM EDT, emergency officials reported flooding ongoing across portions of the North Charleston area. Some homes and buildings remain flooded with particular concern in the neighborhoods near New Ryder Road. While no additional flooding is expected to occur overnight, it will likely take a good portion of the night for flood waters to recede. - Some locations that will experience flooding include... North Charleston, Summerville, Goose Creek, Hanahan, I-26/I-526 Interchange, Naval Weapons Station Charleston, Ladson, Daniel Island, Charleston Airport and Magnolia Gardens. - This includes the following highways... I-26 between mile markers 206 and 214. I-526 between mile markers 18 and 21. Safety instructions: Be especially cautious at night when it is harder to recognize the dangers of flooding.

* Affected Area: Northern and Central Idaho Panhandle (Zone 101) and Selkirk Mountains of Northeast Washington (Zone 700). * Thunderstorms: Isolated to scattered thunderstorms into Sunday morning. * Outflow Winds: Gusty outflow wind gusts up to 30 mph. * Impacts: Lightning strikes will have the potential to start new fires, and gusty and erratic outflow winds could cause rapid spread of new and existing wildfires. Safety instructions: A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior.

...The Flood Warning is extended for the following rivers in Illinois... Illinois River near Havana affecting Cass, Fulton and Mason Counties. ...The Flood Warning continues for the following rivers in Illinois... Illinois River at Beardstown affecting Schuyler, Cass, Brown and Morgan Counties. .The following forecasts are based on observed precipitation, soil moisture conditions, and forecast precipitation. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Illinois River at Beardstown. * WHEN...Until further notice. * IMPACTS...At 18.0 feet, Seepage problems begin in the Lost Creek Drainage and Levee District. * ADDITIONAL DETAILS... - At 7:45 PM CDT Saturday the stage was 16.3 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 7:45 PM CDT Saturday was 16.4 feet. - Forecast...The river is expected to rise to a crest of 16.4 feet just after midnight tonight. - Flood stage is 14.0 feet. - http://www.weather.gov/safety/flood Safety instructions: Persons with interests along this river need to remain aware of the latest forecasts and associated flood risk for their area. Stay tuned for further updates on this flooding situation. Additional information is available at www.weather.gov. The next statement will be issued Sunday morning at 900 AM CDT.

Moisture on the northern periphery of Tropical Storm Moke will bring areas of heavy rain to portions of the Big Island through Monday afternoon. * WHAT...Flash flooding caused by excessive rainfall is possible for windward and southeast Big Island. * WHERE...The Big Island. * WHEN...Through Monday afternoon. * IMPACTS...Flood prone roads and other low lying areas may be closed due to elevated runoff and overflowing streams. Urban areas may receive more significant flooding and property damage due to rapid runoff. * ADDITIONAL DETAILS... - Tropical Storm Moke is forecast to bring periods of heavy rain to the Big Island through Monday afternoon. Rainfall totals of 5 to 10 inches, locally up to 15 inches, are possible over the windward and southeast slopes of the Big Island. It will not take a significant amount of rain to cause flash flooding due to saturated grounds from recent heavy rain. Safety instructions: You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.

...The Flood Warning is extended for the following rivers in Illinois... Illinois River near Havana affecting Cass, Fulton and Mason Counties. ...The Flood Warning continues for the following rivers in Illinois... Illinois River at Beardstown affecting Schuyler, Cass, Brown and Morgan Counties. .The following forecasts are based on observed precipitation, soil moisture conditions, and forecast precipitation. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Illinois River near Havana. * WHEN...Until Friday evening. * ADDITIONAL DETAILS... - At 7:45 PM CDT Saturday the stage was 16.4 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 7:45 PM CDT Saturday was 16.5 feet. - Forecast...The river is expected to fall below flood stage early Friday afternoon and continue falling to 13.2 feet Saturday, August 29. - Flood stage is 14.0 feet. - http://www.weather.gov/safety/flood Safety instructions: Persons with interests along this river need to remain aware of the latest forecasts and associated flood risk for their area. Stay tuned for further updates on this flooding situation. Additional information is available at www.weather.gov. The next statement will be issued Sunday morning at 900 AM CDT.

...WIDESPREAD BREEZY WESTERLY WINDS AND LOW RELATIVE HUMIDITY TODAY... ...HIGH-BASED SHOWERS AND THUNDERSTORMS THIS EVENING FOR THE NORTHERN BLUE MOUNTAINS... .An approaching low-pressure system will bring widespread breezy westerly winds through the Cascade gaps, across the Columbia Basin, and into portions of the Blue Mountains today. Coupled with low relative humidity, this will lead to critical fire weather conditions. Moreover, high-based showers and thunderstorms are forecast. * AFFECTED AREA...Fire Weather Zones 690 Kittitas Valley, 691 Lower Columbia Basin of Oregon, 691 Lower Columbia Basin of Washington and 703 Warm Springs Reservation. * TIMING...Until 10 PM PDT this evening. * WINDS...West 15 to 25 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...As low as 15 to 25 percent. * IMPACTS...Any fire that develops will catch and spread quickly. Outdoor burning is not recommended. Safety instructions: A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior.

...WIDESPREAD BREEZY WESTERLY WINDS AND LOW RELATIVE HUMIDITY TODAY... ...HIGH-BASED SHOWERS AND THUNDERSTORMS THIS EVENING FOR THE NORTHERN BLUE MOUNTAINS... .An approaching low-pressure system will bring widespread breezy westerly winds through the Cascade gaps, across the Columbia Basin, and into portions of the Blue Mountains today. Coupled with low relative humidity, this will lead to critical fire weather conditions. Moreover, high-based showers and thunderstorms are forecast. * AFFECTED AREA...Fire Weather Zones 696 John Day Valley, 698 Southern Blue Mountains and 700 Central Mountains of Oregon. * TIMING...Until 10 PM PDT this evening. * WINDS...West 10 to 20 mph with gusts of 30 mph. * RELATIVE HUMIDITY...As low as 10 to 20 percent. * IMPACTS...Any fire that develops will catch and spread quickly. Outdoor burning is not recommended. Safety instructions: A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior.

...WIDESPREAD BREEZY WESTERLY WINDS AND LOW RELATIVE HUMIDITY TODAY... ...HIGH-BASED SHOWERS AND THUNDERSTORMS THIS EVENING FOR THE NORTHERN BLUE MOUNTAINS... .An approaching low-pressure system will bring widespread breezy westerly winds through the Cascade gaps, across the Columbia Basin, and into portions of the Blue Mountains today. Coupled with low relative humidity, this will lead to critical fire weather conditions. Moreover, high-based showers and thunderstorms are forecast. * AFFECTED AREA...Fire Weather Zones 692 Northern Blue Mountains of Oregon and 692 Blue Mountains of Washington. * TIMING...Until 11 PM PDT this evening. * THUNDERSTORMS...Isolated to scattered coverage with abundant lightning. * OUTFLOW WINDS...Gusty, erratic winds of 40 to 60 mph. * IMPACTS...Any fire that develops will catch and spread quickly. Outdoor burning is not recommended. Safety instructions: A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior.

SMWTAE The National Weather Service in Tallahassee has issued a * Special Marine Warning for... Coastal waters from Suwannee River to Keaton Beach out 20 NM... Waters from Suwannee River to Apalachicola FL from 20 to 60 NM... * Until 715 AM EDT. * At 512 AM EDT, strong thunderstorms were located along a line extending from near Buckeye Reef to 25 nm southwest of Suwannee River, moving southwest at 10 knots. HAZARD...Wind gusts 34 knots or greater. SOURCE...Radar indicated. IMPACT...Expect wind gusts in excess of 34 knots...suddenly higher waves...frequent lightning...and heavy downpours. Make sure all on board are wearing life jackets. * Locations impacted include... V Tower and Buckeye Reef. Safety instructions: Move to safe harbor immediately as gusty winds and high waves are expected. Frequent lightning is occurring with these storms. If caught on the open water stay below deck if possible, keep away from ungrounded metal objects.

...THUNDERSTORMS, GUSTY WINDS, AND LOW RELATIVE HUMIDITY SATURDAY INTO SUNDAY... .A cold front will move through the region Saturday into Sunday, bringing a risk for thunderstorms and strong west to southwest winds. This will lead to critical fire weather conditions across the region. * Affected Area: East Washington Central Cascades (Zone 696), East Portion of North Cascades National Park/Lake Chelan National Recreation Area (Zone 697), East Washington North Cascades (Zone 698), Okanogan Highlands and Kettle Mountains (Zone 699) and Methow Valley (Zone 704). * Thunderstorms: Scattered showers and thunderstorms Saturday. * Outflow Winds: Gusty outflow wind gusts up to 50 mph. * Impacts: Lightning strikes will have the potential to start new fires, and gusty and erratic outflow winds could cause rapid spread of new and existing wildfires. Safety instructions: A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior.