Aggregator

...STRONG TO SEVERE THUNDERSTORMS WILL IMPACT THE CASCADE MOUNTAINS TODAY, EXTENDING TO THE EASTERN SLOPES, WHILE SOUTHEASTERN OREGON SEES DRY, WINDY, AND UNSTABLE CONDITIONS... .A potent weather system will bring a myriad of impacts to the forecast area today. For the Cascade Mountains and east slopes, strong to severe thunderstorms will trek across primarily the spine of the Cascades starting in the afternoon down around central Oregon, advancing northward into the Washington Cascades by the evening. While storms along the Cascades are expected to be accompanied by a significant wetting rain, isolated to scattered storms extending into the east slopes and portions of the Columbia Basin will be much drier, leading to critical fire weather conditions due to abundant lightning with a lack of wetting rain. For southeastern Oregon, this same weather system will usher in hot and dry desert air, leading to breezy winds combined with low RHs and locally unstable conditions. Showers and storms are not anticipated to track as far east as southeastern Oregon. Users should note that OR641 and WA691 are under partial Red Flag Warnings. The Warned zones include only the western half of each zone, and not the entirety of the zone. The National Weather Service in Pendleton has issued a Red Flag Warning for abundant lightning, which is in effect from 5 PM this afternoon to 2 AM PDT Sunday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...Portions of Fire Weather Zone 691 Lower Columbia Basin. The easternmost extent of the Warning ends at a line extending from Hanford to Prosser. * IMPACTS...Thunderstorms will be capable of producing frequent cloud-to-ground lightning and erratic, gusty outflow winds. This combination will promote conditions conducive to new fire starts and rapid fire spread for new and existing fires. * THUNDERSTORMS...Abundant lightning with frequent cloud-to- ground lightning strikes. * OUTFLOW WINDS...Gusty winds up to 50 mph.

...STRONG TO SEVERE THUNDERSTORMS WILL IMPACT THE CASCADE MOUNTAINS TODAY, EXTENDING TO THE EASTERN SLOPES, WHILE SOUTHEASTERN OREGON SEES DRY, WINDY, AND UNSTABLE CONDITIONS... .A potent weather system will bring a myriad of impacts to the forecast area today. For the Cascade Mountains and east slopes, strong to severe thunderstorms will trek across primarily the spine of the Cascades starting in the afternoon down around central Oregon, advancing northward into the Washington Cascades by the evening. While storms along the Cascades are expected to be accompanied by a significant wetting rain, isolated to scattered storms extending into the east slopes and portions of the Columbia Basin will be much drier, leading to critical fire weather conditions due to abundant lightning with a lack of wetting rain. For southeastern Oregon, this same weather system will usher in hot and dry desert air, leading to breezy winds combined with low RHs and locally unstable conditions. Showers and storms are not anticipated to track as far east as southeastern Oregon. Users should note that OR641 and WA691 are under partial Red Flag Warnings. The Warned zones include only the western half of each zone, and not the entirety of the zone. The National Weather Service in Pendleton has issued a Red Flag Warning for abundant lightning, which is in effect from 2 PM this afternoon to 11 PM PDT this evening. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...Portions of Fire Weather Zone 641 Lower Columbia Basin of Oregon. The easternmost extent of the Warning ends at a line extending from Boardman to Ione. * IMPACTS...Thunderstorms will be capable of producing frequent cloud-to-ground lightning and erratic, gusty outflow winds. This combination will promote conditions conducive to new fire starts and rapid fire spread for new and existing fires. * THUNDERSTORMS...Abundant lightning with frequent cloud-to- ground lightning strikes. * OUTFLOW WINDS...Gusty winds up to 50 mph.

...STRONG TO SEVERE THUNDERSTORMS WILL IMPACT THE CASCADE MOUNTAINS TODAY, EXTENDING TO THE EASTERN SLOPES, WHILE SOUTHEASTERN OREGON SEES DRY, WINDY, AND UNSTABLE CONDITIONS... .A potent weather system will bring a myriad of impacts to the forecast area today. For the Cascade Mountains and east slopes, strong to severe thunderstorms will trek across primarily the spine of the Cascades starting in the afternoon down around central Oregon, advancing northward into the Washington Cascades by the evening. While storms along the Cascades are expected to be accompanied by a significant wetting rain, isolated to scattered storms extending into the east slopes and portions of the Columbia Basin will be much drier, leading to critical fire weather conditions due to abundant lightning with a lack of wetting rain. For southeastern Oregon, this same weather system will usher in hot and dry desert air, leading to breezy winds combined with low RHs and locally unstable conditions. Showers and storms are not anticipated to track as far east as southeastern Oregon. Users should note that OR641 and WA691 are under partial Red Flag Warnings. The Warned zones include only the western half of each zone, and not the entirety of the zone. * AFFECTED AREA...Fire Weather Zone 642 Southern Blue and Strawberry Mountains. * WINDS...South 10 to 20 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...As low as 10 percent. * IMPACTS...Gusty winds with dry conditions may lead to rapid fire spread. Unstable conditions may promote extreme fire behavior as well.

* WHAT...Flash flooding and debris flows caused by excessive rainfall are possible over burns scars and steep terrain. * WHERE...A portion of west central Washington, including the following areas, West Slopes North Cascades and Passes, West Slopes North Central Cascades and Passes and West Slopes South Central Cascades and Passes. * WHEN...From Saturday afternoon through Sunday morning. * IMPACTS...Heavy rainfall could trigger flash flooding and debris flows in and near recent wildfire burn scars. * ADDITIONAL DETAILS... - National Weather Service Meteorologists are forecasting heavy rainfall over burn scars on the west slopes of the Cascades Saturday afternoon though Sunday morning, which may lead to flash flooding and debris flows. The fast speed of thunderstorm cells may diminish precipitation amounts. - http://www.weather.gov/safety/flood

* AFFECTED AREA...Fire Weather Zone 690 Kittitas Valley. * IMPACTS...Thunderstorms will be capable of producing frequent cloud-to-ground lightning and erratic, gusty outflow winds. This combination will promote conditions conducive to new fire starts and rapid fire spread for new and existing fires. * THUNDERSTORMS...Abundant lightning with frequent cloud-to- ground lightning strikes. * OUTFLOW WINDS...Gusty winds up to 50 mph.

* AFFECTED AREA...Fire Weather Zone 691 Lower Columbia Basin. * IMPACTS...Thunderstorms will be capable of producing frequent cloud-to-ground lightning and erratic, gusty outflow winds. This combination will promote conditions conducive to new fire starts and rapid fire spread for new and existing fires. * THUNDERSTORMS...Abundant lightning with frequent cloud-to- ground lightning strikes. * OUTFLOW WINDS...Gusty winds up to 50 mph.

* AFFECTED AREA...Fire Weather Zone 641 Lower Columbia Basin of Oregon. * IMPACTS...Thunderstorms will be capable of producing frequent cloud-to-ground lightning and erratic, gusty outflow winds. This combination will promote conditions conducive to new fire starts and rapid fire spread for new and existing fires. * THUNDERSTORMS...Abundant lightning with frequent cloud-to- ground lightning strikes. * OUTFLOW WINDS...Gusty winds up to 50 mph.

* AFFECTED AREA...Fire Weather Zone 642 Southern Blue and Strawberry Mountains. * WINDS...South 10 to 20 mph with gusts up to 25 mph. * RELATIVE HUMIDITY...As low as 10 percent. * IMPACTS...Gusty winds with dry conditions may lead to rapid fire spread. Unstable conditions may promote extreme fire behavior as well.

* WHAT...Flash flooding and debris flows caused by excessive rainfall continue to be possible over the 2024 burn areas associated with active wildfires. * WHERE...Portions of Oregon, including the following areas, Cascades of Lane County, Cascades of Marion and Linn Counties and North Oregon Cascades and southwest Washington, including the following area, South Washington Cascades. * WHEN...From Saturday afternoon through late Saturday night. * IMPACTS...Heavy rainfall is expected over the 2024 burn areas associated with active wildfires. Residents near these areas should prepare for potential flooding impacts. Be sure to stay up to date with information from local authorities. Heavy rainfall could trigger flash flooding of low-lying areas, and debris flows in and near recent wildfire burn scars. * ADDITIONAL DETAILS... - National Weather Service Meteorologists are forecasting heavy rainfall over 2024 burn areas associated with active wildfires, which may lead to flash flooding and debris flows. Hourly rainfall rates up to 0.75 inches per hour will be possible. - http://www.weather.gov/safety/flood

* WHAT...Flash flooding and debris flows caused by excessive rainfall continue to be possible over the 2024 burn areas associated with active wildfires. * WHERE...Portions of Oregon, including the following areas, Cascades of Lane County, Cascades of Marion and Linn Counties and North Oregon Cascades and southwest Washington, including the following area, South Washington Cascades. * WHEN...From Saturday afternoon through late Saturday night. * IMPACTS...Heavy rainfall is expected over the 2024 burn areas associated with active wildfires. Residents near these areas should prepare for potential flooding impacts. Be sure to stay up to date with information from local authorities. Heavy rainfall could trigger flash flooding of low-lying areas, and debris flows in and near recent wildfire burn scars. * ADDITIONAL DETAILS... - National Weather Service Meteorologists are forecasting heavy rainfall over 2024 burn areas associated with active wildfires, which may lead to flash flooding and debris flows. Hourly rainfall rates up to 0.75 inches per hour will be possible. - http://www.weather.gov/safety/flood

* AFFECTED AREA...Fire Weather Zone 690 Kittitas Valley. * IMPACTS...Thunderstorms will be capable of producing frequent cloud-to-ground lightning and erratic, gusty outflow winds. This combination will promote conditions conducive to new fire starts and rapid fire spread for new and existing fires. * THUNDERSTORMS...Abundant lightning with frequent cloud-to- ground lightning strikes. * OUTFLOW WINDS...Gusty winds up to 50 mph.

* AFFECTED AREA...Fire Weather Zone 691 Lower Columbia Basin...mainly west of the Tri-cities. * IMPACTS...Thunderstorms will be capable of producing frequent cloud-to-ground lightning and erratic, gusty outflow winds. This combination will promote conditions conducive to new fire starts and rapid fire spread for new and existing fires. * THUNDERSTORMS...Abundant lightning with frequent cloud-to- ground lightning strikes. * OUTFLOW WINDS...Gusty winds up to 50 mph.

* AFFECTED AREA...Fire Weather Zone 641 Lower Columbia Basin of Oregon...mainly west of Hermiston. * IMPACTS...Thunderstorms will be capable of producing frequent cloud-to-ground lightning and erratic, gusty outflow winds. This combination will promote conditions conducive to new fire starts and rapid fire spread for new and existing fires. * THUNDERSTORMS...Abundant lightning with frequent cloud-to- ground lightning strikes. * OUTFLOW WINDS...Gusty winds up to 50 mph.

The National Weather Service in Pendleton has issued a Red Flag Warning for wind and low relative humidity, which is in effect from 1 PM to 8 PM PDT Saturday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...Fire Weather Zone 642 Southern Blue and Strawberry Mountains. * WINDS...South 10 to 20 mph with gusts up to 25 mph. * RELATIVE HUMIDITY...As low as 8 percent. * IMPACTS...Gusty winds with dry conditions may lead to rapid fire spread. Unstable conditions may promote extreme fire behavior as well.

FFWOTX The National Weather Service in Spokane has issued a * Flash Flood Warning for... The Cub Creek Burn Scar in... Central Okanogan County in north central Washington... * Until 515 PM PDT. * At 201 PM PDT, Doppler radar indicated thunderstorms producing heavy rain over the Cub Creek Burn Scar. Between 0.5 and 0.8 inches of rain have fallen. Flash flooding is ongoing or expected to begin shortly. Excessive rainfall over the warning area will cause mud slides near steep terrain. The mud slide can consist of rock, mud, vegetation and other loose materials. HAZARD...Flash flooding caused by thunderstorms in and around the Cub Creek Burn Scar. SOURCE...Radar. IMPACT...Flooding of areas in and around the Cub Creek Burn Scar. * Some locations that will experience flash flooding include... Chewuch Campground and Falls Creek Campground.

* WHAT...Flash flooding caused by excessive rainfall continues to be possible. * WHERE...A portion of south central Washington, including the following areas, Lower Slopes of the Eastern Washington Cascades Crest and Upper Slopes of the Eastern Washington Cascades Crest. * WHEN...From Saturday afternoon through late Saturday night. * IMPACTS...Heavy rainfall could trigger flash flooding of low-lying areas, urbanized street flooding, and debris flows in and near recent wildfire burn scars. * ADDITIONAL DETAILS... - National Weather Service Meteorologists are forecasting heavy rainfall from thunderstorms over the burn scars along the east slopes of the WA Cascades, which may lead to flash flooding and debris flows. - http://www.weather.gov/safety/flood

...WARM, VERY DRY, AND WINDY TOMORROW AFTERNOON AND EVENING IN OR636, OR637, ID423, AND ID426... ...HIGH HAINES, WARM, DRY, AND WINDY TOMORROW AFTERNOON AND EVENING IN IDAHO ZONES 401, 402, 403, AND 421... The National Weather Service in Boise has issued a Red Flag Warning for gusty winds and low relative humidities, which is in effect from 1 PM MDT /noon PDT/ to 8 PM MDT /7 PM PDT/ Saturday. This is an upgrade from the Fire Weather Watch. * Affected Area...In Idaho, Fire Weather Zones 423 Owyhee Mountains and 426 Southern Highlands. In Oregon, Fire Weather Zones 636 Burns BLM and 637 Vale BLM. * Timing...From 1 PM MDT /noon PDT/ to 8 PM MDT /7 PM PDT/ Saturday. * Winds...South 10 to 20 mph with gusts up to 30 to 40 mph. * Relative Humidity...As low as 8 percent. * Temperatures...Up to 93.

Oregon Department of Environmental Quality has issued an Air Quality Advisory...in effect until noon PDT Monday. This air quality advisory covers Lake and northern Klamath counties due to wildfires burning in the region. The DEQ also expects intermittent smoke in eastern Douglas and Jackson County through this period due to smoke from surrounding fires. The wildfire smoke combined with forecast conditions will cause air quality levels to fluctuate and could be at unhealthy levels. Smoke levels can change rapidly depending on the weather and planned burn operations. Smoke can irritate the eyes and lungs and worsen some medical conditions. People most at risk include infants and young children, people with heart or lung disease, older adults and pregnant people. People can take the following precautions to protect their health: - Follow local burn restrictions to prevent deteriorating air quality. - Avoid strenuous outdoor activity during periods of poor air quality. - People with heart or lung problems and young children are especially vulnerable. These people should stay indoors while smoke levels are high. - Use certified High Efficiency Particulate Air (HEPA) filters in indoor heating, ventilation, cooling and air purification systems. - Avoid using wood-burning stoves and other sources of indoor smoke if possible. For additional information...please visit the web site at https://oregonsmoke.org

The National Weather Service in Medford has issued a Red Flag Warning, which is in effect from 1 PM to 9 PM PDT Saturday. * IMPACTS...Abundant lightning on dry fuels could lead to numerous new fire starts. Gusty, shifting outflow winds could also result in changing fire behavior and spread. These winds could also present a danger to aircraft and ground personnel. * AFFECTED AREA...In California...Fire weather zones 280 and 281. In Oregon...Fire weather zones 616, 617, 620, 621, 622 and 623. * THUNDERSTORMS...Scattered to numerous thunderstorms are expected to develop Saturday afternoon and move from south to north through the area into Saturday evening. These storms will contain frequent and abundant cloud to ground lightning. Some of the stronger thunderstorms may contain strong to severe wind gusts and hail. Rainfall is expected with these storms and could be heavy at times. * OUTFLOW WINDS...Gusts up to 60 mph. * HAIL POTENTIAL...5 to 15 percent chance of one half to 1 inch diameter hail. * DETAILED URL...View the hazard area in detail at https://www.wrh.noaa.gov/map/?wfo=mfr

The National Weather Service in Medford has upgraded the Fire Weather Watch to a Red Flag Warning, which is in effect from 2 PM to 8 PM PDT Saturday. * IMPACTS...Strong winds combined with critically low relative humidity can lead to the rapid growth and spread of new and existing fires. * AFFECTED AREA...In Oregon, the southeastern corner of Fire Weather Zone 624, including Lakeview. Much of Fire Weather Zone 625 south of Summer Lake and the Christmas Valley. This includes the Warner Peak Fire, Adel, Paisley and the Hart Mountain Refuge. In California, the eastern half of Fire Weather Zone 285, including Alturas. * WIND...South winds 20 to 30 mph with gusts 35 to 50 mph. * HUMIDITY...10 to 15 percent. * DETAILED URL...View the hazard area in detail at https://www.wrh.noaa.gov/map/?wfo=mfr