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Oregon Department of Environmental Quality has issued an Air Pollution Advisory...in effect until noon PDT Friday. The advisory is in effect for Northern Klamath and 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

* WHAT...Visibility one quarter mile or less in areas of dense fog. * WHERE...Central Coast of Oregon. * WHEN...Until 9 AM PDT this morning. * IMPACTS...Low visibility could make driving conditions hazardous.

* WHAT...Visibility one quarter mile or less in areas of dense fog. Fog will be most prevalent along rivers and lakes. * WHERE...Willamette Valley, Greater Portland and Vancouver Metro, Foothills of the Northern and Central Oregon Cascades, North and Central Coast Range Valleys of Oregon, Lower Columbia River and Cowlitz River Valleys Including I-5, Willapa and Wahkiakum Lowlands, and South Washington Cascade Foothills. * WHEN...Until 10 AM PDT Saturday. * IMPACTS...Low visibility could make driving conditions hazardous.

* WHAT...Visibility one quarter mile or less in areas of dense fog. Fog will be most prevalent along rivers and lakes. * WHERE...Willamette Valley, Greater Portland and Vancouver Metro, Foothills of the Northern and Central Oregon Cascades, North and Central Coast Range Valleys of Oregon, Lower Columbia River and Cowlitz River Valleys Including I-5, Willapa and Wahkiakum Lowlands, and South Washington Cascade Foothills. * WHEN...Until 10 AM PDT Saturday. * IMPACTS...Low visibility could make driving conditions hazardous.

* WHAT...Low temperatures of 33 to 36F will produce areas of frost. * WHERE...Upper Hood River Valley. * WHEN...Until 9 AM PDT Saturday. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered. * ADDITIONAL DETAILS...Areas around Parkdale and Dee Flat will experience the coldest temperatures.

...BREEZY WINDS AND LOW HUMIDITY EXPECTED TODAY... .Winds will increase as a Pacific cold front sweeps across the Pacific Northwest. Very dry air and breezy winds will be present across portions of central and eastern Oregon and southeast Washington ahead of afternoon frontal passage. As a result, this area will be susceptible to rapid fire spread. Winds remain breezy across the region, but relative humidities have begun to increase significantly, bringing the region out of red flag criteria. Therefore, the red flag warning will be allowed to expire.

...BREEZY WINDS AND LOW HUMIDITY EXPECTED TODAY... .Winds will increase as a Pacific cold front sweeps across the Pacific Northwest. Very dry air and breezy winds will be present across portions of central and eastern Oregon and southeast Washington ahead of afternoon frontal passage. As a result, this area will be susceptible to rapid fire spread. * AFFECTED AREA...Fire Weather Zone 640 Central Mountains of Oregon. * WINDS...Northwest 10 to 20 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...As low as 13 percent. * IMPACTS...Rapid fire spread may occur, particularly in dry grassy areas.

...BREEZY WINDS AND LOW HUMIDITY EXPECTED TODAY... .Winds will increase as a Pacific cold front sweeps across the Pacific Northwest. Very dry air and breezy winds will be present across portions of central and eastern Oregon and southeast Washington ahead of afternoon frontal passage. As a result, this area will be susceptible to rapid fire spread. * AFFECTED AREA...Fire Weather Zone 642 Southern Blue and Strawberry Mountains. * WINDS...Northwest 15 to 25 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...As low as 16 percent. * IMPACTS...Rapid fire spread may occur, particularly in dry grassy areas.

* WHAT...Southwest winds 20 to 30 mph with gusts up to 50 mph expected. * WHERE...Winchester, Potlatch, Colfax, Lewiston, Alpowa Summit, Anatone, Lapwai, Genesee, Pomeroy, Peola, La Crosse, Gifford, Oakesdale, Rosalia, Uniontown, Lewiston Grade, Moscow, Mountain Road, Nezperce, Kamiah, Cloverland Road, Pullman, Clarkston, Soldiers Meadow Road, Plummer, Culdesac, Peck, Tekoa, and Craigmont. * WHEN...Until 7 PM PDT this evening. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result.

* WHAT...Visibility between one-quarter and one mile in blowing dust. * WHERE...Grande Ronde Valley. * WHEN...Until 8 PM PDT this evening. * IMPACTS...Hazardous driving conditions due to reduced visibility.

...WINDY THIS AFTERNOON AND EVENING... Temperatures will climb into the upper 60s to mid 70s this afternoon prior to the arrival of a strong cold front between 3 PM and 5 PM. The combination of low humidity and gusty southwest winds ahead of the front followed by a wind shift to the west (gusting to 50 mph) raises concerns for rapid and erratic spreading of any new ignitions. Bands of light rain, cooler temperatures, and rising humidity will follow the passage of the cold front this evening. * Affected Area: Fire Weather Zone 709 Lower Palouse -Snake River (Zone 709). * Winds: West 20 to 30 mph with gusts up to 50 mph. * Relative Humidities: 14 to 23 percent. * Impacts: Risk of rapidly spreading fires.

The National Weather Service in Spokane has issued a * Dust Advisory for... Western Latah County in the Panhandle of Idaho... Northwestern Nez Perce County in north central Idaho... Southwestern Benewah County in the Panhandle of Idaho... Northeastern Garfield County in southeastern Washington... Southeastern Whitman County in eastern Washington... Northern Asotin County in southeastern Washington... * Until 315 PM PDT. * At 221 PM PDT, areas of blowing dust were detected on cams around Lewiston and Colfax moving east at 15 mph. As the cold front comes through, winds will increase and additional dust will be possible. Areas of light rain with the front may reduce the dust potential over time. a dust channel was 9 miles west of Pullman, moving east at 20 mph. HAZARD...Less than one miles visibility with strong winds in excess of 45 mph. SOURCE...Doppler radar. IMPACT...Hazardous travel. * This includes the following highways... U.S. Highway 95 in Idaho between mile markers 294 and 381. U.S. Highway 12 in Idaho between mile markers 0 and 18. U.S. Highway 12 in Washington between mile markers 399 and 434. U.S. Highway 195 in Washington between mile markers 0 and 47. Locations impacted include... Lewiston, Pullman, Moscow, Clarkston, Lapwai, Colfax, Pomeroy, Genesee, Troy, Potlatch, Clarkston Heights-Vineland, West Clarkston-Highland, Asotin, Palouse, Garfield, Albion, Colton, Uniontown, Onaway, and Farmington.

* IMPACTS...Strong winds combined with critically low relative humidity could lead to the rapid growth and spread of new and existing fires. * AFFECTED AREA...In California...Fire weather zone 285 including Alturas, and Canby. In Oregon... Fire weather zones 624 and 625. This includes eastern portions of the Fremont Winema National Forest, and the cities of Klamath Falls, Lakeview, Paisley and Summer Lake. * WIND...West to southwest at 25 to 35 mph with gusts up to 50 mph. * HUMIDITY...Minimum afternoon values of 10 to 15 percent but some localized areas as low as 8 percent. * ADDITIONAL DETAILS...Wind gusts will most likely be around 45 mph with only a few areas reaching the 50 mph mark. * DETAILED URL...View the hazard area in detail at https://www.wrh.noaa.gov/map/?wfo=mfr

The National Weather Service in Medford has issued a Red Flag Warning, which is in effect until 8 PM PDT this evening. * IMPACTS...Strong winds combined with critically low relative humidity could lead to the rapid growth and spread of new and existing fires. * AFFECTED AREA...Most of Fire zone 622, including the cities of Medford, White City, Shady Cove, Butte Falls, and Ruch. * WIND...Northwest at 10 to 20 mph with gusts up to 25 mph. * HUMIDITY...Minimum afternoon values of 10 to 15 percent. * DETAILED URL...View the hazard area in detail at https://www.wrh.noaa.gov/map/?wfo=mfr

* WHAT...Low temperatures of 33F to 36F will produce areas of frost. * WHERE...Upper Hood River Valley. * WHEN...From 2 AM to 9 AM PDT Saturday. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered. * ADDITIONAL DETAILS...Areas around Parkdale and Dee Flat will experience the coldest temperatures.

* WHAT...West winds 25 to 35 mph with gusts up to 55 mph expected. * WHERE...Portions of south central and southwest Idaho and southeast Oregon. * WHEN...Until 9 PM MDT /8 PM PDT/ this evening. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result.

* Affected Area...In Oregon, Fire Weather Zones 636 Burns BLM and 637 Vale BLM. * Timing...Until 9 PM MDT /8 PM PDT/ this evening. * Winds...Southwest 20 to 30 mph with gusts up to 50 mph shifting to the northwest with a cold frontal passage this afternoon. * Relative Humidity...As low as 10 percent. * Temperatures...Up to 85.

* WHAT...Southwest winds 25 to 30 mph with gusts up to 50 mph expected. * WHERE...Central and Eastern Lake County. This includes sections of highway 140 east of Lakeview, US Highway 395, and highway 31 between Paisley and north of Summer Lake. * WHEN...Until 8 PM PDT this evening. * IMPACTS...Winds this strong will likely create areas of blowing dust near Summer Lake, which could lower visibilities at times this afternoon. Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. * ADDITIONAL DETAILS...Wind gusts will most likely be around 45 mph with only a few areas reaching the 50 mph mark.

...BREEZY WINDS AND LOW HUMIDITY EXPECTED TODAY... .Winds will increase as a Pacific cold front sweeps across the Pacific Northwest. Very dry air and breezy winds will be present across portions of central and eastern Oregon and southeast Washington ahead of afternoon frontal passage. As a result, this area will be susceptible to rapid fire spread. * AFFECTED AREA...Fire Weather Zone 693 Southeast Washington Grande Ronde Valley. * WINDS...West 15 to 25 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...As low as 15 percent. * IMPACTS...Rapid fire spread may occur, particularly in dry grassy areas.

...BREEZY WINDS AND LOW HUMIDITY EXPECTED TODAY... .Winds will increase as a Pacific cold front sweeps across the Pacific Northwest. Very dry air and breezy winds will be present across portions of central and eastern Oregon and southeast Washington ahead of afternoon frontal passage. As a result, this area will be susceptible to rapid fire spread. * AFFECTED AREA...Fire Weather Zone 642 Southern Blue and Strawberry Mountains. * WINDS...West 15 to 25 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...5 to 15 percent. * IMPACTS...Rapid fire spread may occur, particularly in dry grassy areas.