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* WHAT...Hot conditions with temperatures up to 105 degrees expected. This will pose a major risk of heat-related illness. * WHERE...Lower Columbia Basin of Oregon and Washington, Foothills of the Northern Blue Mountains of Oregon, Yakima Valley, and Foothills of the Blue Mountains of Washington. * WHEN...From 11 AM to 9 PM PDT Tuesday. * IMPACTS...Hot temperatures may cause heat illnesses. Extreme heat will significantly increase the risk of heat-related illnesses for much of the population, especially those who are heat sensitive and those without effective cooling or adequate hydration.

...FIRE WEATHER WATCH IN EFFECT FROM WEDNESDAY AFTERNOON THROUGH WEDNESDAY EVENING FOR ABUNDANT LIGHTNING ON DRY FUELS FOR FIRE WEATHER ZONES 624 AND 625... The National Weather Service in Medford has issued a Red Flag Warning, which is in effect from 2 PM to 11 PM PDT Tuesday. A Fire Weather Watch has also been issued. This Fire Weather Watch is in effect from Wednesday afternoon through Wednesday evening. * AFFECTED AREA...For the Red Flag Warning...in Oregon...the northern half of Fire weather zones 624 and 625. This includes the Fremont and Winema National Forests north of the Sprague River Valley and also the area north and west of Abert Rim. For the Fire Weather Watch...in Oregon...eastern portions of fire zone 624 and southern 625. This includes the Fremont National Forest and areas from Silver Lake and Alkali Lake southward to around Highway 140. * THUNDERSTORMS...Isolated to scattered thunderstorms. Lightning strikes outside of precipitation cores are possible, and cause for concern for new fire starts. * OUTFLOW WINDS...Gusts of 40 to 55 mph could travel outward up to 25 miles from thunderstorm cores. * DETAILED URL...View the hazard area in detail at https://www.wrh.noaa.gov/map/?wfo=mfr

...FIRE WEATHER WATCH IN EFFECT FROM WEDNESDAY AFTERNOON THROUGH WEDNESDAY EVENING FOR ABUNDANT LIGHTNING ON DRY FUELS FOR FIRE WEATHER ZONES 624 AND 625... The National Weather Service in Medford has issued a Red Flag Warning, which is in effect from 2 PM to 11 PM PDT Tuesday. A Fire Weather Watch has also been issued. This Fire Weather Watch is in effect from Wednesday afternoon through Wednesday evening. * AFFECTED AREA...For the Red Flag Warning...in Oregon...the northern half of Fire weather zones 624 and 625. This includes the Fremont and Winema National Forests north of the Sprague River Valley and also the area north and west of Abert Rim. For the Fire Weather Watch...in Oregon...eastern portions of fire zone 624 and southern 625. This includes the Fremont National Forest and areas from Silver Lake and Alkali Lake southward to around Highway 140. * THUNDERSTORMS...Isolated to scattered thunderstorms. Lightning strikes outside of precipitation cores are possible, and cause for concern for new fire starts. * OUTFLOW WINDS...Gusts of 40 to 55 mph could travel outward up to 25 miles from thunderstorm cores. * DETAILED URL...View the hazard area in detail at https://www.wrh.noaa.gov/map/?wfo=mfr

* WHAT...Temperatures will largely exceed triple digits in the Treasure Valley, with areas near Emmett and Ontario seeing high temperatures up to 106F. * WHERE...Treasure Valley Zones. * WHEN...From noon MDT /11 AM PDT/ to 9 PM MDT /8 PM PDT/ Tuesday. * IMPACTS...Hot temperatures may cause heat illnesses, especially for the young, elderly, and animals.

* WHAT...High temperatures of 97-105 degrees expected. * WHERE...Omak, Wenatchee, Alpowa Summit, Harrington, Bridgeport, Nespelem, Pomeroy, Cashmere, Wilbur, Entiat, Number 2 Canyon, Grand Coulee, Waterville, Coulee City, Clarkston, Tonasket, Othello, Mansfield, Ephrata, Chelan, Number 1 Canyon, Oroville, Moses Lake, Quincy, Okanogan, Brewster, Badger Mountain Road, Creston, Ritzville, Disautel Pass, Pangborn Airport, and Odessa. * WHEN...From 11 AM to 9 PM PDT Tuesday. * IMPACTS...Hot temperatures may cause heat illnesses.

* IMPACTS...Abundant lightning on dry fuels resulting in the potential for numerous new fire starts. Any fires that develop will likely spread rapidly. * AFFECTED AREA...In Oregon...the northern half of Fire weather zones 624 and 625. This includes the Fremont and Winema National Forests north of the Sprague River Valley and also the area north and west of Abert Rim. * THUNDERSTORMS...Isolated to scattered thunderstorms. Lightning strikes outside of precipitation cores are possible, and cause for concern. * OUTFLOW WINDS...Gusts of 40 to 55 mph could travel outward up to 25 miles from thunderstorm cores. * DETAILED URL...View the hazard area in detail at https://www.wrh.noaa.gov/map/?wfo=mfr

* WHAT...High temperatures of 97-102 degrees expected. * WHERE...Mansfield, Wenatchee, Number 2 Canyon, Harrington, Clarkston, Pangborn Airport, Moses Lake, Grand Coulee, Nespelem, Disautel Pass, Number 1 Canyon, Okanogan, Wilbur, Othello, Brewster, Chelan, Alpowa Summit, Badger Mountain Road, Ritzville, Quincy, Tonasket, Ephrata, Odessa, Waterville, Omak, Bridgeport, Creston, Cashmere, Entiat, Oroville, Coulee City, and Pomeroy. * WHEN...From 11 AM to 9 PM PDT Tuesday. * IMPACTS...Hot temperatures may cause heat illnesses.

* WHAT...Hot conditions with temperatures up to 105 degrees expected. This will pose a major risk of heat-related illness. * WHERE...Lower Columbia Basin of Oregon and Washington, Foothills of the Northern Blue Mountains of Oregon, Yakima Valley, and Foothills of the Blue Mountains of Washington. * WHEN...From 11 AM to 9 PM PDT Tuesday. * IMPACTS...Hot temperatures may cause heat illnesses. Extreme heat will significantly increase the risk of heat-related illnesses for much of the population, especially those who are heat sensitive and those without effective cooling or adequate hydration.

* WHAT...Hot conditions with temperatures up to 105 degrees expected. This will pose a major risk of heat-related illness. * WHERE...Lower Columbia Basin of Oregon and Washington, Foothills of the Northern Blue Mountains of Oregon, Yakima Valley, and Foothills of the Blue Mountains of Washington. * WHEN...From 11 AM to 9 PM PDT Tuesday. * IMPACTS...Hot temperatures may cause heat illnesses. Extreme heat will significantly increase the risk of heat-related illnesses for much of the population, especially those who are heat sensitive and those without effective cooling or adequate hydration.

...HOT, DRY, AND WINDY TUESDAY AND WEDNESDAY... .Hot and very dry conditions will be in place on Tuesday. Winds will increase through the day with gusts 15 to 25 mph from the East Slopes to the Palouse. Locally stronger winds will develop late Tuesday afternoon and evening in the foothills of the Cascades and across the Waterville Plateau producing gusts around 30 mph. A dry cold front will sweep through the region on Wednesday delivering stronger winds region-wide. Humidity levels increase on Wednesday but remain near critical levels. The National Weather Service in Spokane has issued a Fire Weather Watch for wind and low relative humidity, which is in effect from Tuesday afternoon through Wednesday evening. * Affected Area: Western Columbia Basin (Zone 707), Eastern Columbia Basin -Palouse -Spokane Area (Zone 708) and Lower Palouse -Snake River (Zone 709). * Winds: Tuesday: West to southwest 10 to 20 mph with gusts to 25 mph. Wednesday: West to southwest 15 to 25 mph gusts around 35 mph. * Relative Humidities: 10 to 15 percent on Tuesday. 18 to 25 percent on Wednesday. * Impacts: Rapid fire spread is likely with any new fires.

...HOT, DRY, AND WINDY TUESDAY AND WEDNESDAY... .Hot and very dry conditions will be in place on Tuesday. Winds will increase through the day with gusts 15 to 25 mph from the East Slopes to the Palouse. Locally stronger winds will develop late Tuesday afternoon and evening in the foothills of the Cascades and across the Waterville Plateau producing gusts around 30 mph. A dry cold front will sweep through the region on Wednesday delivering stronger winds region-wide. Humidity levels increase on Wednesday but remain near critical levels. The National Weather Service in Spokane has issued a Fire Weather Watch for wind and low relative humidity, which is in effect from Tuesday afternoon through Wednesday evening. * Affected Area: Okanogan Valley (Zone 703), Foothills of Central Washington Cascades (Zone 705) and Waterville Plateau (Zone 706). * Winds: Tuesday: West 15 to 20 mph with gusts to 25 mph increasing 30 mph in the evening. Wednesday: West 20 to 30 mph with gusts up to 40 mph. * Relative Humidities: 8 to 15 percent on Tuesday. 20 to 27 percent on Wednesday. * Impacts: Rapid fire spread is likely with any new fires.

...DRY THUNDERSTORMS EXPECTED FOR TUESDAY AFTERNOON THROUGH TUESDAY EVENING FOR ABUNDANT LIGHTNING FOR THE CENTRAL MOUNTAINS OF OREGON AND SOUTHERN DESCHUTES NATIONAL FOREST... .The ridge of high pressure is anticipated to break down Tuesday afternoon with a dry cold front making its way into the region. Ahead of the front, instability is expected to increase along with an influx of mid-level moisture. This will lead to convection along the central mountains of Oregon and through the southern Deschutes National Forest Tuesday afternoon. Dry thunderstorms will be isolated. The National Weather Service in Pendleton has issued a Fire Weather Watch for abundant lightning, which is in effect from Tuesday afternoon through Tuesday evening. * AFFECTED AREA...Fire Weather Zones 700 Central Mountains of Oregon and 705 Southern Deschutes National Forest. * TIMING...From Tuesday afternoon through Tuesday evening. * IMPACTS...Any fire that develops will catch and spread quickly. Outdoor burning is not recommended. * THUNDERSTORMS...Storms are mostly expected to be dry with rainfall amounts less than a tenth of an inch, though a few storms could produce rainfall amounts in excess of a tenth of an inch. * OUTFLOW WINDS...As high as 45 mph.

The National Weather Service in Medford has issued a Fire Weather Watch, which is in effect from Tuesday afternoon through Tuesday evening. * IMPACTS...Abundant lightning on dry fuels resulting in the potential for numerous new fire starts. Any fires that develop will likely spread rapidly. * AFFECTED AREA...In Oregon...the northern half of Fire weather zones 624 and 625. This includes the Fremont and Winema National Forests north of the Sprague River Valley and also the area north and west of Abert Rim. * THUNDERSTORMS...Isolated to scattered thunderstorms. Lightning strikes outside of precipitation cores are possible, and cause for concern. * OUTFLOW WINDS...Gusts of 40 to 55 mph could travel outward up to 25 miles from thunderstorm cores. * DETAILED URL...View the hazard area in detail at https://www.wrh.noaa.gov/map/?wfo=mfr

At 649 PM PDT, Doppler radar was tracking a strong thunderstorm 7 miles west of Drewsey, or 31 miles northeast of Burns, moving east at 20 mph. HAZARD...Wind gusts up to 40 mph and pea size hail. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Areas of blowing dust possible. Minor damage to outdoor objects is possible. This strong thunderstorm will be near... Drewsey around 700 PM PDT. Drinkwater Pass around 720 PM PDT.

At 627 PM PDT, Doppler radar was tracking a strong thunderstorm over Lawen, or 17 miles southeast of Burns, moving northeast at 35 mph. HAZARD...Wind gusts up to 40 mph and pea size hail. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Areas of blowing dust possible. Minor damage to outdoor objects is possible. This strong thunderstorm will be near... Coleman Mountain around 700 PM PDT.

At 623 PM PDT, Doppler radar was tracking a strong thunderstorm 8 miles northwest of Mount Vernon, or 14 miles northwest of John Day, moving east at 10 mph. HAZARD...Wind gusts up to 50 mph and pea size hail. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Minor hail damage to vegetation is possible. Locations impacted include... John Day, Canyon City, Mount Vernon, and Fox.

* WHAT...Flash flooding caused by excessive rainfall continues to be possible. * WHERE...Portions of northeast and southeast Oregon, including the following counties, in northeast Oregon, Baker County. In southeast Oregon, Harney County and Malheur County. * WHEN...Until 8 PM PDT /9 PM MDT/ this evening. * IMPACTS...Heavy rainfall could trigger flash flooding or debris flows in and near recent wildfire burn scars. * ADDITIONAL DETAILS... - National Weather Service Meteorologists are forecasting heavy rainfall over the burn scar, which may lead to flash flooding and debris flows. - https://www.weather.gov/safety/flood

At 341 PM PDT, Doppler radar was tracking a cluster of strong thunderstorms near Sheep Rock, or 38 miles southeast of John Day, moving northeast at 40 mph. HAZARD...Wind gusts up to 50 mph and pea size hail. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Areas of blowing dust reducing visibilities. Minor damage to outdoor objects is possible. This strong thunderstorm will be near... Ironside Mountain around 450 PM MDT. Ironside and Eldorado Pass around 500 PM MDT. Baldy Mountain around 510 PM MDT.

At 334 PM PDT, Doppler radar was tracking a strong thunderstorm near Swamp Creek Buttes, or 40 miles northwest of Rome, moving east at 30 mph. HAZARD...Wind gusts up to 50 mph and half inch hail. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Areas of blowing dust reducing visibilities. Minor damage to outdoor objects is possible. This strong thunderstorm will be near... Turnbull Mountain around 440 PM MDT. Copeland Butte around 450 PM MDT. Knottingham Butte around 510 PM MDT.

* WHAT...There is a threat of flash flooding caused by excessive rainfall from thunderstorms through this evening. * WHERE...Southeast Oregon. * WHEN...Until 8 PM PDT /9 PM MDT/ this evening. * IMPACTS...Heavy rainfall could trigger flash flooding or debris flows in and near recent wildfire burn scars. * ADDITIONAL DETAILS... - There is a risk for heavy rainfall over the burn scar, which may lead to flash flooding and debris flows. - https://www.weather.gov/safety/flood