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...SCATTERED THUNDERSTORMS WEDNESDAY AND INTO THE EVENING... .A strong upper level low will create conditions very favorable for the development of thunderstorms Wed into Wed evening. Storms are expected to form in eastern OR early Wed and move into SW ID around noon MDT. After this first round moves through, additional storms should form and then continue to move northeast throughout the region. Scattered lightning is likely. The National Weather Service in Boise has issued a Fire Weather Watch for lightning, which is in effect from Wednesday morning through Wednesday evening. * Thunderstorms...Scattered. * Outflow Winds...50 to 60 mph. * Timing...From Wednesday morning through Wednesday evening.

Oregon Department of Environmental Quality has issued an Air Pollution Advisory...in effect until 2 PM PDT Wednesday. The advisory is in effect for Eastern Douglas, Northern Klamath and Northern Lake counties. Wildfires burning in the region 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. People 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 Quality Advisory.. until 5 PM PDT Wednesday. 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

...DRY AND BREEZY MONDAY AFTERNOON AND EARLY EVENING... The National Weather Service in Spokane has issued a Red Flag Warning for wind and low relative humidity, which is in effect from noon to 7 PM PDT Monday. The Fire Weather Watch is no longer in effect. * Affected Area: Fire Weather Zone 708 Eastern Columbia Basin - Palouse -Spokane Area (Zone 708) and Fire Weather Zone 709 Lower Palouse -Snake River (Zone 709). * Winds: Southwest 10 to 20 mph with gusts up to 30 mph. * Relative Humidities: 14 to 21 percent. * Impacts: Risk of rapidly spreading fires.

...ISOLATED TO SCATTERED THUNDERSTORMS TODAY... .Isolated to scattered thunderstorms continue to be possible this afternoon across the Blue/Strawberry/Wallowa Mountains through the evening hours. * AFFECTED AREA...Fire Weather Zones 643 Northern Blue Mountains of Oregon, 645 Wallowa District, 692 Blue Mountains of Washington and 693 Southeast Washington Grande Ronde Valley. * IMPACTS...New fire starts and rapid fire spread due to cloud- to-ground lightning and gusty outflow winds. * THUNDERSTORMS...Isolated to 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 producing wind gusts of 30 to 45 mph.

...ISOLATED TO SCATTERED THUNDERSTORMS TODAY... .Isolated to scattered thunderstorms continue to be possible this afternoon across the Blue/Strawberry/Wallowa Mountains through the evening hours. * AFFECTED AREA...Fire Weather Zones 643 Northern Blue Mountains of Oregon, 645 Wallowa District, 692 Blue Mountains of Washington and 693 Southeast Washington Grande Ronde Valley. * IMPACTS...New fire starts and rapid fire spread due to cloud- to-ground lightning and gusty outflow winds. * THUNDERSTORMS...Isolated to 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 producing wind gusts of 30 to 45 mph.

...ISOLATED TO SCATTERED THUNDERSTORMS TODAY... .Isolated to scattered thunderstorms continue to be possible this afternoon across the Blue/Strawberry/Wallowa Mountains through the evening hours. * AFFECTED AREA...Fire Weather Zones 642 Southern Blue and Strawberry Mountains and 644 Central Blue Mountains. * IMPACTS...New fire starts and rapid fire spread due to cloud- to-ground lightning and gusty outflow winds. * THUNDERSTORMS...Isolated to 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 producing wind gusts of 30 to 45 mph.

...ISOLATED TO SCATTERED THUNDERSTORMS TODAY... .Isolated to scattered thunderstorms are expected through afternoon across the Blue Mountains, adjacent foothills, and portions of the Columbia Basin as a weather system moves over the region. * AFFECTED AREA...Fire Weather Zones 643 Northern Blue Mountains of Oregon, 645 Wallowa District, 692 Blue Mountains of Washington and 693 Southeast Washington Grande Ronde Valley. * IMPACTS...New fire starts and rapid fire spread due to cloud- to-ground lightning and gusty outflow winds. * THUNDERSTORMS...Isolated to 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 producing wind gusts of 30 to 45 mph.

...ISOLATED TO SCATTERED THUNDERSTORMS TODAY... .Isolated to scattered thunderstorms are expected through afternoon across the Blue Mountains, adjacent foothills, and portions of the Columbia Basin as a weather system moves over the region. * AFFECTED AREA...Fire Weather Zones 642 Southern Blue and Strawberry Mountains and 644 Central Blue Mountains. * IMPACTS...New fire starts and rapid fire spread due to cloud- to-ground lightning and gusty outflow winds. * THUNDERSTORMS...Isolated to 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 producing wind gusts of 30 to 45 mph.

...ISOLATED TO SCATTERED THUNDERSTORMS TODAY... .Isolated to scattered thunderstorms are expected through afternoon across the Blue Mountains, adjacent foothills, and portions of the Columbia Basin as a weather system moves over the region. * AFFECTED AREA...Fire Weather Zones 643 Northern Blue Mountains of Oregon, 645 Wallowa District, 692 Blue Mountains of Washington and 693 Southeast Washington Grande Ronde Valley. * IMPACTS...New fire starts and rapid fire spread due to cloud- to-ground lightning and gusty outflow winds. * THUNDERSTORMS...Isolated to 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 producing wind gusts of 30 to 45 mph.

...ISOLATED TO SCATTERED THUNDERSTORMS TODAY... .Isolated to scattered thunderstorms are expected through afternoon across the Blue Mountains, adjacent foothills, and portions of the Columbia Basin as a weather system moves over the region. The National Weather Service in Pendleton has issued a Red Flag Warning for abundant lightning, which is in effect until 8 PM PDT this evening. * AFFECTED AREA...Fire Weather Zone 641 Lower Columbia Basin of Oregon. * IMPACTS...New fire starts and rapid fire spread due to cloud- to-ground lightning and gusty outflow winds. * THUNDERSTORMS...Isolated to 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 producing wind gusts of 30 to 45 mph.

...DRY AND BREEZY MONDAY AFTERNOON AND EARLY EVENING... The National Weather Service in Spokane has issued a Fire Weather Watch for wind and low relative humidity, which is in effect from Monday afternoon through Monday evening. * Affected Area: Fire Weather Zone 708 Eastern Columbia Basin - Palouse -Spokane Area (Zone 708) and Fire Weather Zone 709 Lower Palouse -Snake River (Zone 709). * Winds: Southwest 10 to 20 mph with gusts up to 30 mph. * Relative Humidities: 14 to 22 percent. * Impacts: Risk of rapidly spreading fires.

...ISOLATED TO SCATTERED THUNDERSTORMS TODAY... .Isolated thunderstorms have initiated across the southern Blue Mountains this morning. Additional development is expected through morning and afternoon across the Blue Mountains as a weather system moves over the region. 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 Fire Weather Watch is no longer in effect. * AFFECTED AREA...Fire Weather Zones 643 Northern Blue Mountains of Oregon, 645 Wallowa District, 692 Blue Mountains of Washington and 693 Southeast Washington Grande Ronde Valley. * IMPACTS...New fire starts and rapid fire spread due to cloud- to-ground lightning and gusty outflow winds. * THUNDERSTORMS...Isolated to 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 producing wind gusts of 30 to 45 mph.

...ISOLATED TO SCATTERED THUNDERSTORMS TODAY... .Isolated thunderstorms have initiated across the southern Blue Mountains this morning. Additional development is expected through morning and afternoon across the Blue Mountains as a weather system moves over the region. 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 Zone 642 Southern Blue and Strawberry Mountains. * IMPACTS...New fire starts and rapid fire spread due to cloud- to-ground lightning and gusty outflow winds. * THUNDERSTORMS...Isolated to 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 producing wind gusts of 30 to 45 mph.

...ISOLATED TO SCATTERED THUNDERSTORMS TODAY... .Isolated thunderstorms have initiated across the southern Blue Mountains this morning. Additional development is expected through morning and afternoon across the Blue Mountains as a weather system moves over the region. 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 Fire Weather Watch is no longer in effect. * AFFECTED AREA...Fire Weather Zones 643 Northern Blue Mountains of Oregon, 645 Wallowa District, 692 Blue Mountains of Washington and 693 Southeast Washington Grande Ronde Valley. * IMPACTS...New fire starts and rapid fire spread due to cloud- to-ground lightning and gusty outflow winds. * THUNDERSTORMS...Isolated to 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 producing wind gusts of 30 to 45 mph.

...ISOLATED TO SCATTERED THUNDERSTORMS TODAY... .Isolated thunderstorms have initiated across the southern Blue Mountains this morning. Additional development is expected through morning and afternoon across the Blue Mountains as a weather system moves over the region. 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 Fire Weather Watch is no longer in effect. * AFFECTED AREA...Fire Weather Zone 644 Central Blue Mountains. * IMPACTS...New fire starts and rapid fire spread due to cloud- to-ground lightning and gusty outflow winds. * THUNDERSTORMS...Isolated to 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 producing wind gusts of 30 to 45 mph.

...UNSTABLE CONDITIONS CONTINUE, WITH THUNDERSTORMS DEVELOPING ONCE AGAIN TONIGHT AND SUNDAY... .Unstable conditions will persist once again tomorrow, before an oncoming weather system shifts the threat from instability to that of thunderstorms. 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, 692 Blue Mountains of Washington 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 tomorrow, before an oncoming weather system shifts the threat from instability to that of thunderstorms. 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, 692 Blue Mountains of Washington 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.

* IMPACTS...Thunderstorms can cause new fire starts and spread fires quickly due to outflow winds. * 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. * DETAILED URL...View the hazard area in detail at https://www.wrh.noaa.gov/map/?wfo=mfr

...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.