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...SCATTERED THUNDERSTORMS THIS EVENING IN THE DESCHUTES NATIONAL FOREST... ...HOT AND UNSTABLE WITH ISOLATED THUNDERSTORMS OVER PORTIONS OF CENTRAL AND SOUTHEAST OREGON THROUGH SATURDAY EVENING... The National Weather Service in Pendleton has issued a Red Flag Warning for abundant lightning, which is in effect until midnight PDT tonight. * AFFECTED AREA...Fire Weather Zones 610 East Slopes of Central Oregon Cascades and 611 Deschutes National Forest -minus Sisters Ranger District. * TIMING...Now through midnight tonight. * IMPACTS...New fire starts and possible rapid fire spread with gusty outflow winds. * THUNDERSTORMS...Scattered thunderstorms producing occasional cloud to ground lightning and light rain. LAL 3 * OUTFLOW WINDS...Storms are capable of outflow winds 25 to 35 mph.

* WHAT...Hot conditions with temperatures in the mid 90s to low 100s expected. * WHERE...The Coeur d'Alene area down to the Lewiston Clarkston Valley, central and eastern Washington. * WHEN...Until 9 PM PDT Saturday. * 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.

* AFFECTED AREA...Fire Weather Zone 658 West Slopes of the North Cascades Generally above 1500 Feet. * RELATIVE HUMIDITY...As low as 15 to 20 percent. * TEMPERATURES...Up to 85. * 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 15 to 20 percent. * TEMPERATURES...Up to 90. * 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 652 West Portion of the Olympic Mountains and Fire Weather Zone 661 East Portion of the Olympic Mountains. * RELATIVE HUMIDITY...As low as 20 to 25 percent. * TEMPERATURES...Up to 85. * 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.

* WHAT...Temperatures around 100 to 105 expected this afternoon. * WHERE...In California, Western Siskiyou County. In Oregon, Central Douglas County, Eastern Curry County and Josephine County, Jackson County, and South Central Oregon Coast. This includes the lower Klamath, Rogue, Illinois, Umpqua, upper Coquille, and Camas valleys. This includes the cities of Somes Bar, Happy Camp, Ashland, Medford, Grants Pass, Cave Junction, Roseburg, Agness, and Powers. * WHEN...Until 10 PM PDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.

* IMPACTS...Any fires that develop will likely spread rapidly. * AFFECTED AREA...This includes eastern Fire weather zone 617, including the Diamond Complex and the southern portions of the Homestead Complex near the Fuller Lake, Reynolds Butte and Bullpup fires, northern Fire weather zone 623 north of Lake of the Woods, Fire weather zone 624 north and east of Chiloquin and northwest Fire weather zone 625 from Summer Lake northwestward. * THUNDERSTORMS...Isolated to scattered thunderstorms are expected to develop this afternoon and evening. Storms are likely to be dry with little or no rainfall. * OUTFLOW WINDS...Strong, gusty outflows up to around 50 mph are expected near storms. * DETAILED URL...View the hazard area in detail at https://www.wrh.noaa.gov/map/?wfo=mfr

* WHAT...Hot conditions with temperatures up to 98 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 Saturday. * 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 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 Saturday. * 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 95 degrees. This will pose a moderate to major risk of heat-related illness. * WHERE...Ochoco-John Day Highlands and Southern Blue Mountains of Oregon. * WHEN...Until 9 PM PDT Saturday. * 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 98 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 Saturday. * 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.

...HOT, DRY, AND UNSTABLE... * AFFECTED AREA...Fire Weather Zones 640 Central Mountains of Oregon and 642 Southern Blue and Strawberry Mountains. * TIMING...Now through Saturday evening. * WINDS...Southeast 5 to 10 mph. * RELATIVE HUMIDITY...As low as 9 percent. * TEMPERATURES...Up to 95. * IMPACTS...Possible plume dominated fire behavior. * HAINES...As high as 6.

Oregon Department of Environmental Quality has issued an Air Quality Advisory.. until 4 PM PDT Monday. A Smoke Air Quality Advisory has been issued. Wildfires burning in the region combined with forecasted conditions will cause air quality to reach unhealthy levels. 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. For additional information...please visit the Web site at http://www.oregon.gov/DEQ

* 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...East 5 to 10 mph with gusts up to 15 mph. * RELATIVE HUMIDITY...As low as 15 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...Winds will gradually weaken through the evening.

* AFFECTED AREA...In Washington, Fire Weather Zone 636 Western Columbia River Gorge in Oregon and Washington. * WINDS...East 5 to 10 mph with gusts to 15 to 20 mph. * 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.

* 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...East 5 to 10 mph with gusts up to 15 mph. * RELATIVE HUMIDITY...As low as 15 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...Winds will gradually weaken through the evening.

* AFFECTED AREA...In Oregon, Fire Weather Zone 689 Northern Willamette National Forest and Fire Weather Zone 690 Southern Willamette National Forest. * WINDS...West 5 mph or less, except east 5 to 10 mph with gusts up to 15 mph along the Cascade crest. * RELATIVE HUMIDITY...As low as 15 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 to 20 percent chance for thunderstorms Friday afternoon and evening. Storms may produce lightning and gusty erratic outflow winds. Lightning strikes could ignite new fires and outflow winds could lead to rapid fire growth.

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 12 PM PDT Saturday. 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 6 PM PDT Sunday. 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

* WHAT...High concentration of smoke particulates from wildfire smoke. * WHERE...Northern Harney and Malheur Counties. * WHEN...UNTIL 9 AM PDT MONDAY. * IMPACTS...Smoke can irritate the eyes, lungs and worsen some medical conditions. People most at risk to adverse health effects include infants, young children, people with heart or lung disease, older adults, and pregnant women. * ADDITIONAL DETAILS...Smoke levels can change rapidly depending on weather. Check current conditions on the Oregon Smoke Information Blog, DEQ's Air Quality Index, or by downloading the free OregonAIR app on your smartphone.