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...HOT, DRY AND UNSTABLE ALONG WITH BREEZY WINDS TUESDAY THROUGH THURSDAY... High pressure that has brought the hot temperatures the past weekend is showing signs of breaking down. The instability will increase as a result, and the combination of hot, dry and unstable weather warrants Red Flag Warnings. In addition, breezy winds will develop through the Cascade gaps and into portions of the Columbia Basin Wednesday and Thursday, and will coincide with low relative humidities in the afternoon and evening. * AFFECTED AREA...Fire Weather Zones 610 East Slopes of Central Oregon Cascades, 611 Deschutes National Forest -minus Sisters Ranger District, 694 Yakama Alpine District and 695 East Washington South Central Cascade Mountains. * TIMING...Through Tuesday night. * WINDS...Northwest 5 to 10 mph. * RELATIVE HUMIDITY...As low as 11 percent. * TEMPERATURES...Up to 101. * IMPACTS...Any new and existing fires have a strong potential for extreme fire behavior. * HAINES...As high as 6.

...HOT, DRY AND UNSTABLE ALONG WITH BREEZY WINDS TUESDAY THROUGH THURSDAY... High pressure that has brought the hot temperatures the past weekend is showing signs of breaking down. The instability will increase as a result, and the combination of hot, dry and unstable weather warrants Red Flag Warnings. In addition, breezy winds will develop through the Cascade gaps and into portions of the Columbia Basin Wednesday and Thursday, and will coincide with low relative humidities in the afternoon and evening. The National Weather Service in Pendleton has issued a Red Flag Warning for dry and unstable conditions followed by breezy winds and low relative humidity, which is in effect Tuesday and Wednesday. * AFFECTED AREA...Fire Weather Zones 639 East Slopes of the Northern Oregon Cascades and 640 Central Mountains of Oregon. * TIMING...Today through Wednesday night. * WINDS...Northwest 10 to 20 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...As low as 7 percent. * TEMPERATURES...Up to 104. * IMPACTS...Any new and existing fires have a strong potential for extreme fire behavior. * HAINES...As high as 6.

* WHAT...For the Excessive Heat Warning, dangerously hot conditions through Friday expected, especially in the lower elevations. For the Excessive Heat Watch, dangerously hot conditions possible. * WHERE...Portions of southwest and west central Idaho and southeast Oregon. * WHEN...For the Excessive Heat Warning, until midnight MDT /11 PM PDT/ Friday night. For the Excessive Heat Watch, from late Friday night through Sunday evening. * IMPACTS...Extreme heat will significantly increase the potential for heat related illnesses, particularly for those working or participating in outdoor activities. * ADDITIONAL DETAILS...Temperatures of 103 to 110 expected for lower elevations through Friday.

* WHAT...For the Heat Advisory, hot temperatures expected in the lower elevations. For the Excessive Heat Watch, dangerously hot conditions possible. * WHERE...Southwest Highlands, Western Magic Valley and Southern Twin Falls County. * WHEN...For the Heat Advisory, until midnight MDT Friday night. For the Excessive Heat Watch, from late Friday night through Sunday evening. * IMPACTS...Extreme heat will significantly increase the potential for heat related illnesses, particularly for those working or participating in outdoor activities. * ADDITIONAL DETAILS...Temperatures of 100 to 104 for lower elevations expected.

* WHAT...For the Excessive Heat Warning, dangerously hot conditions through Friday expected, especially in the lower elevations. For the Excessive Heat Watch, dangerously hot conditions possible. * WHERE...Baker County. * WHEN...For the Excessive Heat Warning, until 11 PM PDT Friday. For the Excessive Heat Watch, from Friday evening through Sunday evening. * IMPACTS...Extreme heat will significantly increase the potential for heat related illnesses, particularly for those working or participating in outdoor activities. * ADDITIONAL DETAILS...Temperatures of 103 to 110 expected for lower elevations through Friday, except slightly cooler temperatures expected Thursday.

* WHAT...For the Heat Advisory, hot temperatures expected in the lower elevations. For the Excessive Heat Watch, dangerously hot conditions possible. * WHERE...Southwest Highlands, Western Magic Valley and Southern Twin Falls County. * WHEN...For the Heat Advisory, until midnight MDT Friday night. For the Excessive Heat Watch, from late Friday night through Sunday evening. * IMPACTS...Extreme heat will significantly increase the potential for heat related illnesses, particularly for those working or participating in outdoor activities. * ADDITIONAL DETAILS...Temperatures of 100 to 104 for lower elevations expected.

* WHAT...For the Excessive Heat Warning, dangerously hot conditions through Friday expected, especially in the lower elevations. For the Excessive Heat Watch, dangerously hot conditions possible. * WHERE...Portions of southwest and west central Idaho and southeast Oregon. * WHEN...For the Excessive Heat Warning, until midnight MDT /11 PM PDT/ Friday night. For the Excessive Heat Watch, from late Friday night through Sunday evening. * IMPACTS...Extreme heat will significantly increase the potential for heat related illnesses, particularly for those working or participating in outdoor activities. * ADDITIONAL DETAILS...Temperatures of 103 to 110 expected for lower elevations through Friday.

* WHAT...For the Excessive Heat Warning, dangerously hot conditions through Friday expected, especially in the lower elevations. For the Excessive Heat Watch, dangerously hot conditions possible. * WHERE...Baker County. * WHEN...For the Excessive Heat Warning, until 11 PM PDT Friday. For the Excessive Heat Watch, from Friday evening through Sunday evening. * IMPACTS...Extreme heat will significantly increase the potential for heat related illnesses, particularly for those working or participating in outdoor activities. * ADDITIONAL DETAILS...Temperatures of 103 to 110 expected for lower elevations through Friday, except slightly cooler temperatures expected Thursday.

Oregon Department of Environmental Quality has issued an Air Pollution Advisory...in effect until 2 PM PDT Thursday. A wildfire burning in the region combined with forecast conditions will cause air quality levels to fluctuate and could be at unhealthy levels. The Oregon Department of Environmental Quality issued an air quality advisory for Jackson County due to smoke from the Salt Creek fire. DEQ also expects other areas of the state may see intermittent smoke from ongoing large wildfires. Smoke levels can change rapidly depending on the weather. 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. Keep windows and doors closed. If its too hot, run air conditioning on recirculate or consider moving to a cooler location. Avoid strenuous outdoor activity. Use high- efficiency particulate air (HEPA) filters in indoor ventilation systems or portable air purifiers. Be aware of smoke in your area and avoid places with the highest levels. When air quality improves to moderate or healthy, open windows and doors to air out homes and businesses. If you have a breathing plan for a medical condition, be sure to follow it and keep any needed medications refilled. For additional information...please visit the web site at https://oregonsmoke.org

* WHAT...Dangerously hot conditions with high temperatures 105 to 110 degrees, and low temperatures in the mid 60s to lower 70s through Tuesday, then continuing hot with high temperatures 100 to 110 on Wednesday. * WHERE...In California, western and central Siskiyou County. This includes the cities of Yreka, Weed, Etna, Happy Camp, Mt Shasta City, and Dunsmuir. In Oregon, Josephine and Jackson counties and eastern Curry County. This includes the entire Rogue Valley and the cities of Medford, Grants Pass, Cave Junction, and Butte Falls. * WHEN...Until 9 PM PDT Wednesday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Area rivers will be cold and can cause shock to swimmers.

* WHAT...High temperatures of 95 to 102 degrees with lows in the mid to upper 50s expected. * WHERE...In California, Modoc County and eastern Siskiyou County. This includes the cities and communities of Macdoel, Tulelake, Pondosa, Bray, Tennant, Dorris, Tionesta, Alturas, and Adin. In Oregon, Klamath and Lake counties. This includes the cities of Klamath Falls, Chemult, Summer Lake, Chiloquin, Malin, Keno, Sprague River, and Lakeview. * WHEN...Until 9 PM PDT Wednesday. * IMPACTS...Hot temperatures may cause heat illnesses. Area rivers will be cold and can cause shock to swimmers.

* WHAT...High temperatures of 100 to 108 with low temperatures in the mid to upper 60s expected. * WHERE...Central Douglas County and Eastern Douglas County Foothills. This includes the cities of Roseburg, Toketee Falls, and Sutherlin. * WHEN...Until 9 PM PDT this evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat events, particularly for those working or participating in outdoor activities. Area rivers will be cold and can cause shock to swimmers. * ADDITIONAL DETAILS...This will be a long-duration heatwave with hot temperatures through Tuesday.

An Air Quality Alert has been issued by the following agencies: Washington Department of Ecology An Air Quality Alert has been issued for all of Chelan county plus the Methow Valley down to Brewster in Okanogan county on Tuesday 7/9/2024 and until further notice, due to expected smoke from the Pioneer fire and other regional wildfires. Particulate matter (PM2.5) may reach Unhealthy and Unhealthy for Sensitive Groups levels. Health Impacts and Recommended Actions: When air quality is Unhealthy, everyone should reduce exposure. Limit time outside, avoid strenuous activity, and follow tips for cleaner indoor air. When air quality is Unhealthy for Sensitive Groups, sensitive groups should take steps to reduce exposure. Limit time outside, avoid strenuous outdoor activity, and follow tips for cleaner indoor air. Everyone should watch for symptoms as a sign to reduce exposure. Agricultural and outdoor burning restrictions are in effect.

* WHAT...Hot conditions with high temperatures in the mid to upper 90s and low temperatures in the lower to mid 60s. This will pose a moderate to major risk of heat-related illness. * WHERE...Hood Canal Area, Bellevue and Vicinity, Bremerton and Vicinity, East Puget Sound Lowlands, Everett and Vicinity, Seattle and Vicinity, Tacoma Area, West Slopes North Cascades and Passes, West Slopes North Central Cascades and Passes, and West Slopes South Central Cascades and Passes. * WHEN...Until 5 PM PDT Wednesday. * IMPACTS...Heat will significantly increase the risk of heat-related illnesses for those who are sensitive to heat, especially those without effective cooling or adequate hydration. 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. * ADDITIONAL DETAILS...The warmest locations will remain in the urban centers, as well as the foothills and valleys of the Cascades where the cooling marine influence will be the last to arrive.

* WHAT...Hot conditions with high temperatures mostly in the 90s and low temperatures in the 60s. This will pose a moderate risk of heat-related illness. * WHERE...Admiralty Inlet Area, Eastern Strait of Juan de Fuca, Olympics, San Juan County, Western Skagit County, Western Whatcom County, Lower Chehalis Valley Area, and Southwest Interior. * WHEN...Until 10 PM PDT this evening. * IMPACTS...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. * ADDITIONAL DETAILS...Temperatures will gradually cool during the middle and late portions of the week, but will remain well above normal in the 80s for much of the lowlands.

...HOT, DRY, UNSTABLE CONDITIONS ALONG THE EAST SLOPES OF THE CASCADES MONDAY AND TUESDAY... ...FIRE WEATHER WATCH FOR WIND AND LOW HUMIDITY WEDNESDAY AFTERNOON AND EVENING IN CENTRAL WASHINGTON... * Affected Area: Fire Weather Zone 696 East Washington Central Cascades (Zone 696) and Fire Weather Zone 697 East Portion of North Cascades National Park/Lake Chelan National Recreation Area (Zone 697). * Winds: Through Tuesday: 4-10 mph. A weak push of northwest winds Tuesday evening 10-15 mph. On Wednesday: west to northwest 10 to 20 mph with gusts up to 30 mph. * Relative Humidities: Tuesday: 8 to 14 percent in the valleys and 14 to 23 percent over the higher terrain. Wednesday: 10 to 15 percent in the valleys and 15 to 25 percent in the higher terrain. Poor overnight humidity recovery. * Temperatures: High temperatures 100 to 108 in the valleys, 80s and 90s in the mountains. * Impacts: hot, dry, and unstable conditions through Tuesday then wind on Wednesday will lead to the potential for rapid fire growth on any new or existing fires.

...HOT, DRY, UNSTABLE CONDITIONS ALONG THE EAST SLOPES OF THE CASCADES MONDAY AND TUESDAY... ...FIRE WEATHER WATCH FOR WIND AND LOW HUMIDITY WEDNESDAY AFTERNOON AND EVENING IN CENTRAL WASHINGTON... The National Weather Service in Spokane has issued a Fire Weather Watch for wind and low relative humidity, which is in effect from Wednesday afternoon through Wednesday evening. * Affected Area: Fire Weather Zone 703 Okanogan Valley (Zone 703), Fire Weather Zone 704 Methow Valley (Zone 704), Fire Weather Zone 705 Foothills of Central Washington Cascades (Zone 705), Fire Weather Zone 706 Waterville Plateau (Zone 706) and Fire Weather Zone 707 Western Columbia Basin (Zone 707). * Winds: West 13 to 20 mph with gusts up to 35 mph. In the Okanogan Valley, winds starting off south 10 to 18 mph and shifting to west 10 to 20 mph. * Relative Humidities: 8 to 15 percent. * Impacts: Any new or existing fires will have the potential to spread rapidly.

...HOT, DRY, UNSTABLE CONDITIONS ALONG THE EAST SLOPES OF THE CASCADES MONDAY AND TUESDAY... ...FIRE WEATHER WATCH FOR WIND AND LOW HUMIDITY WEDNESDAY AFTERNOON AND EVENING IN CENTRAL WASHINGTON... * Affected Area: Fire Weather Zone 698 East Washington North Cascades (Zone 698). * Relative Humidities: Minimum values 10 to 16 percent in the valleys and 14 to 23 percent over the higher terrain. Poor overnight humidity recovery. * Temperatures: High temperatures 97 to 104 in the valleys, 80s and 90s in the mountains. * Impacts: Hot, dry, and unstable conditions will lead to the potential for rapid fire growth on any new or existing fires.

...HOT, DRY, UNSTABLE CONDITIONS ALONG THE EAST SLOPES OF THE CASCADES MONDAY AND TUESDAY... ...FIRE WEATHER WATCH FOR WIND AND LOW HUMIDITY WEDNESDAY AFTERNOON AND EVENING IN CENTRAL WASHINGTON... * Affected Area: Fire Weather Zone 696 East Washington Central Cascades (Zone 696) and Fire Weather Zone 697 East Portion of North Cascades National Park/Lake Chelan National Recreation Area (Zone 697). * Winds: Through Tuesday: 4-10 mph. A weak push of northwest winds Tuesday evening 10-15 mph. On Wednesday: west to northwest 10 to 20 mph with gusts up to 30 mph. * Relative Humidities: Tuesday: 8 to 14 percent in the valleys and 14 to 23 percent over the higher terrain. Wednesday: 10 to 15 percent in the valleys and 15 to 25 percent in the higher terrain. Poor overnight humidity recovery. * Temperatures: High temperatures 100 to 108 in the valleys, 80s and 90s in the mountains. * Impacts: hot, dry, and unstable conditions through Tuesday then wind on Wednesday will lead to the potential for rapid fire growth on any new or existing fires.

* WHAT...Dangerously hot conditions with limited overnight relief. Afternoon high temperatures of 95 to 110 degrees. Overnight low temperatures in the 60s to mid-70s. This will pose a major risk of heat-related illness. * WHERE...Portions of north central and northeast Oregon and central, south central, and southeast Washington. * WHEN...Until 10 PM PDT Wednesday. * IMPACTS...Heat-related illnesses increase significantly during extreme heat events. * ADDITIONAL DETAILS...Hottest temperatures during this long-duration heatwave are expected Today.