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...15-30% CHANCE OF THUNDERSTORMS PRODUCING DRY LIGHTNING SATURDAY AFTERNOON AND EVENING... * AFFECTED AREA...In Oregon, Fire Weather Zone 688 Mt. Hood National Forest Region. In Washington, Fire Weather Zone 634 Southern Gifford Pinchot National Forest and Fire Weather Zone 635 Mt. Adams Ranger District of the Gifford-Pinchot National Forest. * WINDS...Southeast 5 to 10 mph with gusts up to 15 mph. Brief and highly localized outflow wind gusts up to 40 mph possible with any shower or thunderstorm that passes by. * RELATIVE HUMIDITY...As low as 20 percent. * IMPACTS...Conditions may be favorable for rapid fire spread which may threaten life and property. Use extra caution with potential ignition sources, especially in grassy areas. Outdoor burning is not recommended. * ADDITIONAL DETAILS...There is a 15-30% chance of thunderstorms through 8 PM PDT Saturday over the Cascade mountains. Very little to no rainfall will accompany any thunderstorm that does develop, increasing the potential for dry lightning igniting new wildfire starts.

...15-20% CHANCE OF THUNDERSTORMS PRODUCING DRY LIGHTNING SATURDAY AFTERNOON AND EVENING... * AFFECTED AREA...In Oregon, Fire Weather Zone 689 Northern Willamette National Forest and Fire Weather Zone 690 Southern Willamette National Forest. * WINDS...West around 5 mph with gusts up to 10 mph. Brief and highly localized outflow wind gusts up to 40 mph possible with any shower or thunderstorm that passes by. * RELATIVE HUMIDITY...As low as 25 percent. * IMPACTS...Conditions may be favorable for rapid fire spread which may threaten life and property. Use extra caution with potential ignition sources, especially in grassy areas. Outdoor burning is not recommended. * ADDITIONAL DETAILS...There is a 15-20% chance of thunderstorms through 8 PM PDT Saturday over the Cascade mountains. Very little to no rainfall will accompany any thunderstorm that does develop, increasing the potential for dry lightning igniting new wildfire starts.

The National Weather Service in Medford has issued a Red Flag Warning, which is in effect until 9 PM PDT this evening. * IMPACTS...Any fires that develop will likely spread rapidly. * AFFECTED AREA...In ORZ624...northern portions of fire weather zone 624 from Chemult north and northeast. In ORZ625...northern portions of Fire weather zone 625 from Summer Lake north. * THUNDERSTORMS...Isolated to scattered thunderstorms are expected to develop this afternoon and evening. Storms may be dry with little or no rainfall. * OUTFLOW WINDS...Strong, gusty outflows up to around 45 mph are expected near storms. * DETAILEDURL...View the hazard area in detail at https://www.wrh.noaa.gov/map/?wfo=mfr

...UNSTABLE CONDITIONS CONTINUE, WITH THUNDERSTORMS DEVELOPING ONCE AGAIN TONIGHT AND SUNDAY... .Unstable conditions will persist once again today, before an oncoming weather system shifts the threat from instability to that of thunderstorms. Clearing has been observed across central Oregon, and with that, scattered thunderstorms are expected to develop this evening. Storms are expected to develop over the eastern mountains tomorrow afternoon as well, however forecast confidence remains on the lower end, so will hold off on upgrading the watch there for now. The National Weather Service in Pendleton has issued a Fire Weather Watch for abundant lightning, which is in effect from Sunday morning through Sunday evening. * AFFECTED AREA...Fire Weather Zone 692 Blue Mountains of Washington. * IMPACTS...New fire starts and rapid fire spread due to outflow winds. * THUNDERSTORMS...Scattered thunderstorms producing abundant lightning and gusty outflow winds. Most storms will be accompanied by light rain. * OUTFLOW WINDS...Outflow winds are always possible with storms, and these storms will be capable of 30 to 40 mph wind gusts.

...UNSTABLE CONDITIONS CONTINUE, WITH THUNDERSTORMS DEVELOPING ONCE AGAIN TONIGHT AND SUNDAY... .Unstable conditions will persist once again today, before an oncoming weather system shifts the threat from instability to that of thunderstorms. Clearing has been observed across central Oregon, and with that, scattered thunderstorms are expected to develop this evening. Storms are expected to develop over the eastern mountains tomorrow afternoon as well, however forecast confidence remains on the lower end, so will hold off on upgrading the watch there for now. * AFFECTED AREA...Fire Weather Zones 643 Northern Blue Mountains of Oregon, 644 Central Blue Mountains, 645 Wallowa District and 693 Southeast Washington Grande Ronde Valley. * IMPACTS...New fire starts and rapid fire spread due to outflow winds. * THUNDERSTORMS...Scattered thunderstorms producing abundant lightning and gusty outflow winds. Most storms will be accompanied by light rain. * OUTFLOW WINDS...Outflow winds are always possible with storms, and these storms will be capable of 30 to 40 mph wind gusts.

...UNSTABLE CONDITIONS CONTINUE, WITH THUNDERSTORMS DEVELOPING ONCE AGAIN TONIGHT AND SUNDAY... .Unstable conditions will persist once again today, before an oncoming weather system shifts the threat from instability to that of thunderstorms. Clearing has been observed across central Oregon, and with that, scattered thunderstorms are expected to develop this evening. Storms are expected to develop over the eastern mountains tomorrow afternoon as well, however forecast confidence remains on the lower end, so will hold off on upgrading the watch there for now. * AFFECTED AREA...Fire Weather Zones 643 Northern Blue Mountains of Oregon, 644 Central Blue Mountains, 645 Wallowa District and 693 Southeast Washington Grande Ronde Valley. * IMPACTS...New fire starts and rapid fire spread due to outflow winds. * THUNDERSTORMS...Scattered thunderstorms producing abundant lightning and gusty outflow winds. Most storms will be accompanied by light rain. * OUTFLOW WINDS...Outflow winds are always possible with storms, and these storms will be capable of 30 to 40 mph wind gusts.

...UNSTABLE CONDITIONS CONTINUE, WITH THUNDERSTORMS DEVELOPING ONCE AGAIN TONIGHT AND SUNDAY... .Unstable conditions will persist once again today, before an oncoming weather system shifts the threat from instability to that of thunderstorms. Clearing has been observed across central Oregon, and with that, scattered thunderstorms are expected to develop this evening. Storms are expected to develop over the eastern mountains tomorrow afternoon as well, however forecast confidence remains on the lower end, so will hold off on upgrading the watch there for now. The National Weather Service in Pendleton has issued a Red Flag Warning for abundant lightning, which is in effect until 11 PM PDT this evening. * AFFECTED AREA...Fire Weather Zones 610 East Slopes of Central Oregon Cascades and 611 Deschutes National Forest -minus Sisters Ranger District. * TIMING...Now through Saturday evening. * RELATIVE HUMIDITY...As low as 15 percent. * TEMPERATURES...Up to 85. * IMPACTS...New fire starts, as well as rapid fire spread due to outflow winds. * ADDITIONAL INFORMATION...Isolated to scattered thunderstorms are forecast for this afternoon and evening that may also bring new starts to the area. * THUNDERSTORMS...Scattered thunderstorms producing abundant lightning and gusty outflow winds. Storms are expected to be dry in nature. * OUTFLOW WINDS...Storms may be capable of producing outflow winds up to and over 40 mph.

...UNSTABLE CONDITIONS CONTINUE, WITH THUNDERSTORMS DEVELOPING ONCE AGAIN TONIGHT AND SUNDAY... .Unstable conditions will persist once again today, before an oncoming weather system shifts the threat from instability to that of thunderstorms. Clearing has been observed across central Oregon, and with that, scattered thunderstorms are expected to develop this evening. Storms are expected to develop over the eastern mountains tomorrow afternoon as well, however forecast confidence remains on the lower end, so will hold off on upgrading the watch there for now. The National Weather Service in Pendleton has issued a Red Flag Warning for abundant lightning, which is in effect until 11 PM PDT this evening. The previous Red Flag Warning for dry and unstable conditions is no longer in effect. * AFFECTED AREA...Fire Weather Zone 640 Central Mountains of Oregon. * TIMING...Now through Saturday evening. * RELATIVE HUMIDITY...As low as 12 percent. * TEMPERATURES...Up to 90. * IMPACTS...New fire starts, as well as rapid fire spread due to outflow winds. * ADDITIONAL INFORMATION...Light shower activity and cloud cover this morning has brought the Haines Index in the area below critical thresholds. Dry thunderstorms are now the primary critical fire weather threat for the zone. * THUNDERSTORMS...Scattered thunderstorms producing abundant lightning and gusty outflow winds. Storms are expected to be dry in nature. * OUTFLOW WINDS...Storms may be capable of producing outflow winds up to and over 40 mph.

...UNSTABLE CONDITIONS CONTINUE, WITH THUNDERSTORMS DEVELOPING ONCE AGAIN TONIGHT AND SUNDAY... .Unstable conditions will persist once again today, before an oncoming weather system shifts the threat from instability to that of thunderstorms. Clearing has been observed across central Oregon, and with that, scattered thunderstorms are expected to develop this evening. Storms are expected to develop over the eastern mountains tomorrow afternoon as well, however forecast confidence remains on the lower end, so will hold off on upgrading the watch there for now. * AFFECTED AREA...Fire Weather Zone 642 Southern Blue and Strawberry Mountains. * TIMING...Now through Saturday evening. * RELATIVE HUMIDITY...As low as 11 percent. * TEMPERATURES...Up to 87. * IMPACTS...Possible plume dominated fire behavior. * ADDITIONAL INFORMATION...Isolated thunderstorms are forecast for this afternoon and evening that may also bring new starts to the area. * HAINES...As high as 6.

Air quality around Government Camp, Timothy Lake, Bennett Pass, and Lost Lake has improved this afternoon. Onshore flow will allow air quality to improve through Sunday. Patchy area of smoke may still be present in areas close to wildfires. More information about air quality can be found at: www.oregon.gov/DEQ

* AFFECTED AREA...Fire Weather Zone 652 West Portion of the Olympic Mountains and Fire Weather Zone 661 East Portion of the Olympic Mountains. * RELATIVE HUMIDITY...As low as 25 to 30 percent. * TEMPERATURES...Up to 82. * HAINES...Mid-level Haines 6. * IMPACTS...A dry and unstable air mass with warm temperatures can contribute to active fire behavior. In Western Washington, significant growth on existing fires takes place under such conditions. If a fire were to begin, air quality may diminish in the surrounding area.

* AFFECTED AREA...Fire Weather Zone 658 West Slopes of the North Cascades Generally above 1500 Feet. * RELATIVE HUMIDITY...As low as 20 to 25 percent. * TEMPERATURES...Up to 86. * HAINES...Mid-level Haines 6. * IMPACTS...A dry and unstable air mass with warm temperatures can contribute to active fire behavior. In Western Washington, significant growth on existing fires takes place under such conditions. If a fire were to begin, air quality may diminish in the surrounding area.

* AFFECTED AREA...Fire Weather Zone 659 West Slopes of the Central Cascades Generally above 1500 Feet. * RELATIVE HUMIDITY...As low as 20 to 25 percent. * TEMPERATURES...Up to 86. * HAINES...Mid-level Haines 6. * IMPACTS...A dry and unstable air mass with warm temperatures can contribute to active fire behavior. In Western Washington, significant growth on existing fires takes place under such conditions. If a fire were to begin, air quality may diminish in the surrounding area.

The Southwest Clean Air Agency has continued an Air Quality Advisory, which is IN EFFECT UNTIL NOON PDT SATURDAY. An Air Quality Advisory for Smoke remains in effect. Wildfires burning in the region combined with forecasted conditions will cause air quality to reach unhealthy levels at times through Saturday morning. Pollutants in smoke can cause burning eyes, runny nose, aggravate heart and lung diseases, and aggravate other serious health problems. Limit outdoor activities and keep children indoors if it is smoky. Please follow medical advice if you have a heart or lung condition. More information about air quality can be found at: www.swcleanair.gov

The Oregon Department of Environmental Quality has issued an Air Quality Advisory, which is IN EFFECT UNTIL 6 PM PDT SUNDAY. An Air Quality Advisory for Smoke has been issued. Wildfires burning in the region combined with forecasted conditions will cause air quality to reach unhealthy levels at times through Sunday evening. Pollutants in smoke can cause burning eyes, runny nose, aggravate heart and lung diseases, and aggravate other serious health problems. Limit outdoor activities and keep children indoors if it is smoky. Please follow medical advice if you have a heart or lung condition. More information about air quality can be found at: www.oregon.gov/DEQ

...CRITICAL FIRE WEATHER CONDITIONS CONTINUE THIS WEEKEND... .Hot, dry, and unstable conditions will continue across central Oregon today. A Pacific frontal system tracking across eastern Oregon and far southeast Washington will bring another round of showers and thunderstorms on Sunday. Storms are not expected to bring as much lightning as what was observed on Labor Day, but the potential lightning is enough to warrant Fire Weather Watches. * AFFECTED AREA...Fire Weather Zones 641 Lower Columbia Basin of Oregon, 643 Northern Blue Mountains of Oregon, 644 Central Blue Mountains, 645 Wallowa District and 693 Southeast Washington Grande Ronde Valley. * IMPACTS...New fire starts and rapid fire spread due to outflow winds. * THUNDERSTORMS...Scattered thunderstorms producing abundant lightning and gusty outflow winds. Most storms will be accompanied by light rain. * OUTFLOW WINDS...Outflow winds are always possible with storms, and these storms will be capable of 30 to 40 mph wind gusts.

...CRITICAL FIRE WEATHER CONDITIONS CONTINUE THIS WEEKEND... .Hot, dry, and unstable conditions will continue across central Oregon today. A Pacific frontal system tracking across eastern Oregon and far southeast Washington will bring another round of showers and thunderstorms on Sunday. Storms are not expected to bring as much lightning as what was observed on Labor Day, but the potential lightning is enough to warrant Fire Weather Watches. * AFFECTED AREA...Fire Weather Zones 641 Lower Columbia Basin of Oregon, 643 Northern Blue Mountains of Oregon, 644 Central Blue Mountains, 645 Wallowa District and 693 Southeast Washington Grande Ronde Valley. * IMPACTS...New fire starts and rapid fire spread due to outflow winds. * THUNDERSTORMS...Scattered thunderstorms producing abundant lightning and gusty outflow winds. Most storms will be accompanied by light rain. * OUTFLOW WINDS...Outflow winds are always possible with storms, and these storms will be capable of 30 to 40 mph wind gusts.

...CRITICAL FIRE WEATHER CONDITIONS CONTINUE THIS WEEKEND... .Hot, dry, and unstable conditions will continue across central Oregon today. A Pacific frontal system tracking across eastern Oregon and far southeast Washington will bring another round of showers and thunderstorms on Sunday. Storms are not expected to bring as much lightning as what was observed on Labor Day, but the potential lightning is enough to warrant Fire Weather Watches. * AFFECTED AREA...Fire Weather Zones 640 Central Mountains of Oregon and 642 Southern Blue and Strawberry Mountains. * TIMING...Now through Saturday evening. * RELATIVE HUMIDITY...As low as 11 percent. * TEMPERATURES...Up to 92. * IMPACTS...Possible plume dominated fire behavior. * ADDITIONAL INFORMATION...Isolated thunderstorms are forecast for this afternoon and evening that may also bring new starts to the area. * HAINES...As high as 6.

* WHAT...Hot conditions with temperatures up to 95 degrees. This will pose a moderate to major risk of heat-related illness. * WHERE...Lower Slopes of the Eastern Washington Cascades Crest. * WHEN...Until 9 PM PDT this evening. * 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.

* WHAT...Hot conditions with temperatures up to 100 degrees. This will pose a moderate to major risk of heat-related illness. * WHERE...Portions of central, north central, and northeast Oregon and central, south central, and southeast Washington. * WHEN...Until 9 PM PDT this evening. * 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.