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* WHAT...Dangerously hot conditions with temperatures between 95 and 105 degrees possible. Low temperatures between 65 to 70 degrees are possible Tuesday night, which would limit overnight relief. * WHERE...Greater Portland/Vancouver Metro, Western and Central Columbia River Gorge, the Corbett area and the Hood River Valley, Lower Columbia River and Cowlitz River Valleys, and Central Willamette Valley. * WHEN...From Tuesday afternoon through Wednesday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. * ADDITIONAL DETAILS...There is a 40-80% chance that Tuesday night low temperatures remain above 65 degrees and a 20-40% they don't drop below 70. There is a 10-30% chance for highs to reach 105 Tuesday and Wednesday across the Willamette Valley, highest on Wednesday.

* WHAT...Dangerously hot conditions with temperatures between 95 and 105 degrees possible. Low temperatures between 65 to 70 degrees are possible Tuesday night, which would limit overnight relief. * WHERE...Greater Portland/Vancouver Metro, Western and Central Columbia River Gorge, the Corbett area and the Hood River Valley, Lower Columbia River and Cowlitz River Valleys, and Central Willamette Valley. * WHEN...From Tuesday afternoon through Wednesday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. * ADDITIONAL DETAILS...There is a 40-80% chance that Tuesday night low temperatures remain above 65 degrees and a 20-40% they don't drop below 70. There is a 10-30% chance for highs to reach 105 Tuesday and Wednesday across the Willamette Valley, highest on Wednesday.

* WHAT...High temperatures of 95 to 100 are expected. Low temperatures will be mainly in the mid to upper 50s. * WHERE...Lake County and eastern Klamath County, South Central Siskiyou County, North Central and Southeast Siskiyou County, Northeast Siskiyou and Northwest Modoc Counties, Modoc County, and Klamath Basin. This includes Klamath Falls, Lakeview, Mount Shasta, and Alturas. * WHEN...From 2 PM Saturday to 8 PM PDT Monday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. * ADDITIONAL DETAILS...This heat wave may extend into Tuesday and Wednesday.

* WHAT...Dangerously hot conditions with high temperatures of 100 to 105 expected, except up to 110 in the valleys of western Siskiyou County. Low temperatures will be mainly in the mid to upper 60s. * WHERE...In California, Central Siskiyou County and Western Siskiyou County. In Oregon, Eastern Curry County and Josephine County and Jackson County. This includes Medford, Ashland, Grants Pass, Cave Junction, Happy Camp, Fort Jones, and Yreka. * WHEN...From 2 PM Saturday to 8 PM PDT Monday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. * ADDITIONAL DETAILS...This heat wave may extend into Tuesday and Wednesday.

* WHAT...High temperatures in the mid 90s to around 100 are expected. Low temperatures will be mainly in the lower to mid 60s. * WHERE...Central Douglas County and Eastern Douglas County Foothills. This includes Roseburg, Canyonville, and Toketee Falls. * WHEN...From 2 PM Saturday to 8 PM PDT Monday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. * ADDITIONAL DETAILS...This heat wave may extend into Tuesday and Wednesday.

* WHAT...Dangerously hot conditions with temperatures between 95 and 105 degrees possible. Low temperatures between 65 to 70 degrees are possible, which would limit overnight relief. * WHERE...Greater Portland/Vancouver Metro, Western and Central Columbia River Gorge, the Corbett area and the Hood River Valley, Lower Columbia River and Cowlitz River Valleys, and Central Willamette Valley. * WHEN...From Tuesday afternoon through Wednesday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. * ADDITIONAL DETAILS...There is a 40-50% chance that Tuesday night low temperatures remain above 70 degrees. There is also a 20-40% chance that Tuesday and Wednesday high temperatures exceed 105 degrees across the Willamette Valley.

* WHAT...Dangerously hot conditions with temperatures between 95 and 105 degrees possible. Low temperatures between 65 to 70 degrees are possible, which would limit overnight relief. * WHERE...Greater Portland/Vancouver Metro, Western and Central Columbia River Gorge, the Corbett area and the Hood River Valley, Lower Columbia River and Cowlitz River Valleys, and Central Willamette Valley. * WHEN...From Tuesday afternoon through Wednesday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. * ADDITIONAL DETAILS...There is a 40-50% chance that Tuesday night low temperatures remain above 70 degrees. There is also a 20-40% chance that Tuesday and Wednesday high temperatures exceed 105 degrees across the Willamette Valley.

* WHAT...Dangerously hot conditions with heat index values around 100 possible. * WHERE...In California, Central Siskiyou County and Western Siskiyou County. In Oregon, Eastern Curry County and Josephine County and Jackson County. * WHEN...From Saturday afternoon through at least Monday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events.

* WHAT...Small stream flooding caused by excessive rainfall is expected. * WHERE...A portion of southeast Oregon, including the following county, Malheur. * WHEN...Until 845 PM MDT. * IMPACTS...Rises in small streams and normally dry washes and arroyos. * ADDITIONAL DETAILS... - At 542 PM MDT, Doppler radar indicated heavy rain due to thunderstorms. This will cause small stream flooding. Between 1 and 2 inches of rain have fallen. - This includes the following streams and drainages... Low Line Ditch, Willow Creek, Cow Creek, Pole Creek, High Line Ditch, Becker Creek and Black Creek. - Some locations that may experience flooding include... Highway 26 between Brogan and Ironside. - https://www.weather.gov/safety/flood

At 352 PM PDT, Doppler radar was tracking a strong thunderstorm near Buckbrush Poison Butte, or 34 miles west of Weiser, moving north at 10 mph. HAZARD...Wind gusts up to 40 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 possible. Minor damage to outdoor objects is possible. This strong thunderstorm will be near... Brogan Hill Summit around 520 PM MDT.

At 333 PM PDT, Doppler radar was tracking a strong thunderstorm near Turnbull Peak, or 26 miles northwest of Rome, moving north at 15 mph. HAZARD...Wind gusts up to 40 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 possible. Minor damage to outdoor objects is possible. This strong thunderstorm will be near... Dowell Butte around 440 PM MDT.

...SCATTERED THUNDERSTORMS OVER SOUTHEAST OREGON WITH GUSTY WINDS ON WEDNESDAY EVENING... Upper level low will bring isolated to scattered thunderstorms with minimal precipitation over the BLM districts of Southwest Idaho and Southeast Oregon this afternoon and evening. Strong outflow winds up to 60 MPH is likely. * AFFECTED AREA...In Oregon, Fire Weather Zones 670 Burns BLM, 672 Southern Grasslands, 673 Central Canyonlands and 674 Northwestern Vale BLM. * TIMING...Until midnight MDT /11 PM PDT/ tonight. * THUNDERSTORMS...Scattered. * OUTFLOW WINDS...Gusty erratic winds up to 60 MPH. * IMPACTS...Any fire that develops will catch and spread quickly. Outdoor burning is not recommended.

* AFFECTED AREA...In Oregon...eastern portions of fire zone 624 and fire zone 625. This includes the Fremont National Forest, including from Silver Lake southward to Bly, as well as most of Lake County. * 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 35 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...Dangerously hot conditions with temperatures above 100 degrees possible. * WHERE...In California, Central Siskiyou County and Western Siskiyou County. In Oregon, Eastern Curry County and Josephine County and Jackson County. * WHEN...From Saturday afternoon through at least Monday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events.

...HOT, DRY, AND WINDY THROUGH WEDNESDAY... * Affected Area: Colville Reservation (Zone 702), Okanogan Valley (Zone 703), Foothills of Central Washington Cascades (Zone 705) and Waterville Plateau (Zone 706). * Winds: West 20 to 30 mph with gusts up to 45 mph. * Relative Humidities: 17 to 25 percent. * Impacts: Rapid fire spread is likely with any new fires.

...HOT, DRY, AND WINDY THROUGH WEDNESDAY... * Affected Area: Western Columbia Basin (Zone 707), Eastern Columbia Basin -Palouse -Spokane Area (Zone 708) and Lower Palouse -Snake River (Zone 709). * Winds: West 20 to 30 mph with gusts up to 45 mph. * Relative Humidities: 13 to 25 percent. * Impacts: Rapid fire spread is likely with any new fires.

...HOT, DRY, AND WINDY THROUGH WEDNESDAY... * Affected Area: Foothills of Northeast Washington (Zone 701). * Winds: Southwest 10 to 20 mph with gusts up to 30 mph. * Relative Humidities: 14 to 25 percent. * Impacts: Rapid fire spread is likely with any new fires.

* AFFECTED AREA...In Oregon...eastern portions of fire zone 624 and fire zone 625. This includes the Fremont National Forest, including from Silver Lake southward to Bly, as well as most of Lake County. * 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 35 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

...DRY THUNDERSTORMS EXPECTED WEDNESDAY AFTERNOON OVER EASTERN OREGON... ...DRY AND WINDY CONDITIONS ACROSS THE COLUMBIA BASIN WEDNESDAY... .A pair of upper-level low-pressure systems will pass over the region through Wednesday. This will lead to thunderstorm development across eastern Oregon Wednesday afternoon and evening. Widespread breezy to windy conditions will persist through Wednesday, strongest through the Cascade gaps and Columbia Basin. * AFFECTED AREA...Fire Weather Zones 691 Lower Columbia Basin of Oregon and 691 Lower Columbia Basin of Washington. * TIMING...From 11 AM to 10 PM PDT Wednesday. * WINDS...West 20 to 30 mph with gusts up to 40 mph. * RELATIVE HUMIDITY...As low 15 percent. * IMPACTS...Any fire that develops will catch and spread quickly. Outdoor burning is not recommended.

...DRY THUNDERSTORMS EXPECTED WEDNESDAY AFTERNOON OVER EASTERN OREGON... ...DRY AND WINDY CONDITIONS ACROSS THE COLUMBIA BASIN WEDNESDAY... .A pair of upper-level low-pressure systems will pass over the region through Wednesday. This will lead to thunderstorm development across eastern Oregon Wednesday afternoon and evening. Widespread breezy to windy conditions will persist through Wednesday, strongest through the Cascade gaps and Columbia Basin. * AFFECTED AREA...Fire Weather Zone 698 Southern Blue Mountains. * TIMING...From 2 PM to 11 PM PDT Wednesday. * 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 55 mph.