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...SCATTERED LIGHTNING EXPECTED MONDAY NIGHT THROUGH TUESDAY EVENING IN OR 646 AND ID 400, 401, 402, AND 403... .An upper level shortwave will move through the area Monday night through Tuesday with favorable dynamics for nocturnal convection. Storms and showers will begin developing to the south of the Watch area and by the time they move in early Tuesday morning, the terrain should provide enough lift for scattered thunderstorms embedded in showers. The National Weather Service in Boise has issued a Fire Weather Watch for lightning, which is in effect from late Monday night through Tuesday afternoon. * Thunderstorms...Scattered. * Outflow Winds...Gusts to 40 mph possible. * Timing...From late Monday night through Tuesday afternoon.

Jackson County Public Health has issued an air quality advisory for Jackson County...in effect until at least 8 PM PDT Monday, August 12. Wildfire smoke combined with forecast conditions will cause air quality levels to fluctuate and could be at unhealthy levels. Smoke levels can change rapidly depending on the weather and planned burn operations. 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. People can take the following precautions to protect their health: - Follow local burn restrictions to prevent deteriorating air quality. - Avoid strenuous outdoor activity during periods of poor air quality. - People with heart or lung problems and young children are especially vulnerable. These people should stay indoors while smoke levels are high. - Use certified High Efficiency Particulate Air (HEPA) filters in indoor heating, ventilation, cooling and air purification systems. - Avoid using wood-burning stoves and other sources of indoor smoke if possible. For additional information...please visit the web site at https://oregonsmoke.org

Oregon Department of Environmental Quality has issued an Air Pollution Advisory...in effect until at least 3 PM PDT on Monday, August 12. The Oregon Department of Environmental Quality issued an air quality advisory for Lake, Klamath, and central and eastern Douglas counties due to wildfires burning in the region. The DEQ also expects intermittent smoke in Josephine County through this period due to smoke from surrounding fires. The wildfire smoke combined with forecast conditions will cause air quality levels to fluctuate and could be at unhealthy levels. Smoke levels can change rapidly depending on the weather and planned burn operations. 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. People can take the following precautions to protect their health: - Follow local burn restrictions to prevent deteriorating air quality. - Avoid strenuous outdoor activity during periods of poor air quality. - People with heart or lung problems and young children are especially vulnerable. These people should stay indoors while smoke levels are high. - Use certified High Efficiency Particulate Air (HEPA) filters in indoor heating, ventilation, cooling and air purification systems. - Avoid using wood-burning stoves and other sources of indoor smoke if possible. For additional information...please visit the web site at https://oregonsmoke.org

...LIGHTNING IN AND NEAR CASCADES TODAY THROUGH MONDAY... Additional rounds of thunderstorms will develop this afternoon through Monday over the east slopes of the Cascades to the Okanogan Highlands. Abundant lightning with frequent cloud to ground lightning strikes is expected. Thunderstorms will also bring the potential for strong outflow winds. Lightning is expected to result in new fire starts and outflow winds may result in rapid fire spread of any new or ongoing fires. The National Weather Service in Spokane has issued a Red Flag Warning for thunderstorms, which is in effect from 1 PM this afternoon to 11 PM PDT Monday. * Affected Area: Fire Weather Zone 696 East Washington Central Cascades (Zone 696), Fire Weather Zone 697 East Portion of North Cascades National Park/Lake Chelan National Recreation Area (Zone 697), Fire Weather Zone 698 East Washington North Cascades (Zone 698), Fire Weather Zone 699 Okanogan Highlands and Kettle Mountains (Zone 699), Fire Weather Zone 703 Okanogan Valley (Zone 703) and Fire Weather Zone 704 Methow Valley (Zone 704). * Thunderstorms: Abundant lightning with frequent cloud to ground lightning strikes. A lull in lightning activity is expected late Sunday night into Monday morning before lightning activity increases again Monday afternoon into Monday evening. * Outflow Winds: Gusty and erratic outflow winds of up to 40 mph will be possible. * Impacts: Lightning may result in new fire starts. Gusty outflow winds will be capable of rapid fire spread and causing erratic wind directions.

..AIR QUALITY ADVISORY IN EFFECT UNTIL 1 PM PDT MONDAY... The Oregon Department of Environmental Quality and the Lane Regional Air Protection Agency have continued an Air Quality Advisory, which is in effect until 1 PM PDT Monday. 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 at least 1 PM PDT Monday. 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 www.lrapa.org

..AIR QUALITY ADVISORY IN EFFECT UNTIL 1 PM PDT MONDAY... The Oregon Department of Environmental Quality and the Lane Regional Air Protection Agency have continued an Air Quality Advisory, which is in effect until 1 PM PDT Monday. 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 at least 1 PM PDT Monday. 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 www.lrapa.org

...WIDELY SCATTERED STORMS WITH FREQUENT LIGHTNING THIS AFTERNOON AND EVENING... .Widely scattered thunderstorms are anticipated to develop this afternoon and evening and will be capable of producing frequent cloud-to-ground lighting and strong wind gusts up to 45 mph. While chances of wetting rain with storms that materialize are elevated at 50% or more, a higher storm coverage is anticipated compared to yesterday/Friday with an overall higher lightning risk. Of which, rainfall amounts approaching 0.25 inches will be likely with some storms due to slow storm motion of around 5-15 mph. Higher wetting rainfall amounts above 0.25 inches cannot be ruled out for storms with much slower movement. * AFFECTED AREA...Fire Weather Zones 690 Kittitas Valley, 694 Yakama Alpine District and 695 East Washington South Central Cascade Mountains. * THUNDERSTORMS...Abundant lightning with frequent cloud-to-ground lightning strikes. * OUTFLOW WINDS...Gusty winds up to 45 mph. * IMPACTS...Lightning may result in new fire starts. Gusty outflow winds will be capable of rapid fire spread and causing erratic wind directions.

...WIDELY SCATTERED STORMS WITH FREQUENT LIGHTNING THIS AFTERNOON AND EVENING... .Widely scattered thunderstorms are anticipated to develop this afternoon and evening capable of producing frequent cloud to ground lighting and strong wind gusts up to 45 mph. While chances of wetting rain with storms that materialize are elevated at 50% or more, a higher storm coverage is anticipated compared to yesterday/Friday with an overall higher lightning risk. Of which, rainfall amounts approaching 0.25 inches will be likely with some storms due to storms moving around 5-15 mph. Higher wetting rainfall amounts above 0.25 inches cannot be ruled out for storms with much slower movement. The National Weather Service in Pendleton has issued a Red Flag Warning for abundant lightning, which is in effect from 11 AM this morning to 10 PM PDT this evening. * AFFECTED AREA...Fire Weather Zones 690 Kittitas Valley, 694 Yakama Alpine District and 695 East Washington South Central Cascade Mountains. * THUNDERSTORMS...Abundant lightning with frequent cloud to ground lightning strikes. * OUTFLOW WINDS...Gusty winds up to 45 mph. * IMPACTS...Lightning may result in new fire starts. Gusty outflow winds will be capable of rapid fire spread and causing erratic wind directions.

The Oregon Department of Environmental Quality has issued an Air Quality Advisory, which is in effect until 8 PM PDT Saturday. An Air Quality Advisory for Ozone has been issued. High levels of ozone in the lower atmosphere in the region combined with forecasted conditions will cause air quality to reach unhealthy levels at times through 8 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.oregon.gov/DEQ

The Oregon Department of Environmental Quality and the Lane Regional Air Protection Agency have continued an Air Quality Advisory, which is in effect until 1 PM PDT Monday. 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 at least 1 PM PDT Monday. 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 www.lrapa.org

Showers and thunderstorms have developed this afternoon across the Washington Cascade crests. These storms have produced abundant lighting and heavy downpours at times, with as much as an inch an hour reported near Stevens Pass. While these storms are largely expected to remain over the wilderness, those outdoors should consider finding shelter until storms dissipate. Those with friends or loved ones hiking or camping in the area should reach out if possible, as these storms could produce minor flooding in canyons or deep valleys, combined with the threat of lightning and even small hail.

* WHAT...Minor flooding caused by excessive rainfall is expected. * WHERE...US 2 at Stevens Pass * WHEN...Until 800 PM PDT. * IMPACTS...Water over roadways. * ADDITIONAL DETAILS... - At 507 PM PDT, Doppler radar indicated heavy rain due to thunderstorms. Minor flooding is ongoing or expected to begin shortly for Stevens Pass. Between 0.5 and 1.25 inches of rain have fallen. - Stevens Pass is the most likely place to experience minor flooding. - Some locations that will experience flooding include... US 2 at Stevens Pass - http://www.weather.gov/safety/flood

Heavy rain from thunderstorms will cause to ponding of water on US 2 as the thunderstorms move eastward this afternoon. * WHAT...Flooding, including ponding of water on the highway, caused by excessive rainfall is expected. * WHERE...A portion of west central Washington, including the following county, King. * WHEN...Until 600 PM PDT. * IMPACTS...Minor ponding of water on the highway. * ADDITIONAL DETAILS... - At 509 PM PDT, Doppler radar and automated rain gauges indicated heavy rain of one inch due to thunderstorms. Minor flooding and ponding of water is possible within the advisory area. - Some locations that may experience flooding include... US 2 at Stevens Pass. - http://www.weather.gov/safety/flood

* AFFECTED AREA...Fire Weather Zone 658 West Slopes of the North Cascades Generally above 1500 Feet. * THUNDERSTORMS...Scattered thunderstorms are expected over the North Cascades with LAL of 3 during the afternoon and evening hours. * OUTFLOW WINDS...Gusty and erratic winds are possible in the vicinity of any thunderstorms that develop. * IMPACTS...Scattered lightning in dry fuels can cause multiple fire starts. Thunderstorms can also bring sudden sharp wind shifts on existing fires, causing rapid changes in a fire's rate of spread and direction of spread. Thunderstorm outflow winds can be a threat for several hours following the start of a new lightning-caused fire. If a fire were to begin, air quality may diminish in the surrounding area.

* WHAT...Hot conditions with temperatures in the mid 80s to low 90s expected. This will pose a moderate to isolated major risk of heat-related illness. * WHERE...Portions of northwest and west central 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. * ADDITIONAL DETAILS...Areas of elevated smoke and haze are expected to remain over western Washington through Friday. This could result in slightly lower temperatures than forecast.

FFWOTX The National Weather Service in Spokane has issued a * Flash Flood Warning for... The Cedar Creek Burn Scar in... Western Okanogan County in north central Washington... * Until 500 PM PDT. * At 154 PM PDT, Doppler radar indicated thunderstorms producing heavy rain over the Cedar Creek Burn Scar. Between 0.4 and 0.8 inches of rain have fallen. Flash flooding is ongoing or expected to begin shortly. Excessive rainfall over the warning area will cause mud slides near steep terrain. The mud slide can consist of rock, mud, vegetation and other loose materials. HAZARD...Flash flooding caused by thunderstorms in and around the Cedar Creek Burn Scar. SOURCE...Radar. IMPACT...Flooding of areas in and around the Cedar Creek Burn Scar. * Some locations that will experience flash flooding include... Mazama.

The Oregon Department of Environmental Quality and the Lane Regional Air Protection Agency have continued an Air Quality Advisory, which is in effect until 1 PM PDT Monday. 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 at least 1 PM PDT Monday. 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 www.lrapa.org

The Yakima Regional Clean Air Agency has issued an Air Quality Alert...IN EFFECT UNTIL FURTHER NOTICE. A Smoke Air Quality Alert 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. Information about air quality is on the Washington Department of Ecology Web site at http://www.ecy.wa.gov/air.html or call 360-407- 6000.

Oregon Department of Environmental Quality has issued an Air Quality Advisory...IN EFFECT UNTIL UNTIL MONDAY AFTERNOON. 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

The Southwest Clean Air Agency will allow the Air Quality Advisory to expire at 1 PM PDT Friday as air quality conditions are expected to gradually improve. More information about air quality can be found at: www.swcleanair.gov