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Oregon Department of Environmental Quality has issued an Air Quality Advisory.. until 11 AM PDT Friday. 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

* WHAT...Sub-freezing temperatures as low as 30 expected. * WHERE...Grande Ronde Valley. * WHEN...From 8 PM this evening to 8 AM PDT Thursday. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.

* WHAT...Temperatures as low as 32 will result in frost formation. * WHERE...Lapwai, La Crosse, Davenport, Nezperce, Oakesdale, Culdesac, Airway Heights, Othello, Peola, Lewiston, Rockford, Pullman, Uniontown, Downtown Spokane, Deer Park, Badger Mountain Road, Lewiston Grade, Tekoa, Ephrata, Grand Coulee, Winchester, Colfax, Mansfield, Mountain Road, Peck, Rosalia, Moscow, Craigmont, Kamiah, Moses Lake, Plummer, Waterville, Anatone, Cloverland Road, Wilbur, Soldiers Meadow Road, Ritzville, Genesee, Spokane Valley, Creston, Cheney, Fairfield, Odessa, Harrington, Gifford, Quincy, Coulee City, and Potlatch. * WHEN...From 1 AM to 8 AM PDT Thursday. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered.

* WHAT...Large waves and hazardous surf conditions. * WHERE...North Coast and Central Coast zones. * WHEN...Until 4 AM PDT Thursday. * IMPACTS...Large waves may wash over beaches, jetties, and other structures unexpectedly. People can be swept off rocks and jetties and drown while observing high surf. Localized beach erosion is possible. * ADDITIONAL DETAILS...Seas are expected to peak late this evening and subside into Thursday morning.

The National Weather Service in Medford has issued a Fire Weather Watch, which is in effect from Friday morning through Friday evening. * IMPACTS...Any fires that develop could spread rapidly. * AFFECTED AREA...In California...Fire weather zone 285. In Oregon... Fire weather zones 624 and 625. This includes eastern portions of the Fremont Winema National Forest. * WIND...West to southwest at 15 to 30 mph with gusts around 30 to 50 mph. * HUMIDITY...Minimum afternoon values around 10 to 20 percent but some localized areas as low as 8 percent. * DETAILED URL...View the hazard area in detail at https://www.wrh.noaa.gov/map/?wfo=mfr

The National Weather Service in Boise has issued a Fire Weather Watch for gusty winds and low relative humidities, which is in effect from Friday afternoon through Friday evening. * Affected Area...In Oregon, Fire Weather Zones 636 Burns BLM and 637 Vale BLM. * Timing...From Friday afternoon through Friday evening. * Winds...Southwest 20 to 30 mph with gusts up to 50 mph. * Relative Humidity...As low as 11 percent. * Temperatures...Up to 85.

* WHAT...Northwest winds 25 to 35 mph with gusts up to 45 mph. * WHERE...Kittitas Valley. * WHEN...Until 10 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.

Temperatures are rising above freezing across the Grande Ronde Valley. Therefore the freeze warning will end at 9 AM.

* IMPACTS...Any fires that develop could spread rapidly. * AFFECTED AREA...In California...Fire weather zone 280. In Oregon, fire weather zones 618, 619, 620, 621, 622 and 623. This includes portions of the Western Klamath National Forest, Southern Oregon Coast, Western Siskiyou National Forest, and the Illinois Valley. It also includes the Siskiyou Mountains, portions of the Rogue River National Forest in the Eastern Rogue Valley region and the Winema National Forest of westernmost Klamath County nearest the Southern Oregon Cascades. * WIND...East 15 to 25 mph with gusts to 35 mph easing to 10 to 20 mph this afternoon. * HUMIDITY...Recoveries of only 20 to 35 percent this morning. Single digits to upper teens this afternoon. * DETAILED URL...View the hazard area in detail at https://www.wrh.noaa.gov/map/?wfo=mfr

* WHAT...Sub-freezing temperatures as low as 30 expected. * WHERE...Grande Ronde Valley. * WHEN...From 2 AM to 9 AM PDT Tuesday. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.

The National Weather Service in Medford has upgraded the Fire Weather Watch to a Red Flag Warning, which is in effect from 8 PM this evening to 11 AM PDT Tuesday. * IMPACTS...Any fires that develop will likely spread rapidly. * AFFECTED AREA...Fire weather zones 621, 622 and 623. This includes the Siskiyou Mountains, portions of the Rogue River National Forest in the Eastern Rogue Valley region and the Winema National Forest of westernmost Klamath County nearest the Southern Oregon Cascades. * WIND...Tonight into Tuesday morning, east winds 15 to 25 mph with gusts up to 35 mph. * HUMIDITY...Relative humidity recoveries tonight into Tuesday morning of only 20 to 35 percent. * DETAILED URL...View the hazard area in detail at https://www.wrh.noaa.gov/map/?wfo=mfr

* IMPACTS...Any fires that develop could spread rapidly. * AFFECTED AREA...In California...Fire weather zone 280. In Oregon, fire weather zone 618, 619, and 620. This includes portions of the Western Klamath National Forest, Southern Oregon Coast, Western Siskiyou National Forest, and the Illinois Valley. Poor RH recovery and gusty northeast winds will affect ridges overnight, while all of the area will receive gusty northeast winds and low RH in the afternoons. * WIND...This afternoon 10 to 20 mph with gusts up to 30 mph, then increasing to 15 to 25 mph with gusts up to 35 mph tonight into Tuesday morning. * HUMIDITY...Single digits to upper teens in the afternoon. Recoveries only 20 to 35 percent tonight. * DETAILED URL...View the hazard area in detail at https://www.wrh.noaa.gov/map/?wfo=mfr

Temperatures have warmed above freezing and will continue to do so throughout the day. Therefore, the Freeze Warning will be allowed to expire.

* WHAT...Sub-freezing temperatures as low as 26 expected. * WHERE...Republic, Orin-Rice Road, Lookout Pass, Athol, Wauconda, Springdale-Hunters Road, Wallace, Kettle Falls, Ione, Fruitland, Northport, Newport, Highway 20 Wauconda Summit, Dobson Pass, Chesaw Road, Sandpoint, Clark Fork, Chewelah, Colville, Priest River, Fernwood, St. Maries, Pinehurst, Metaline Falls, Inchelium, Flowery Trail Road, Schweitzer Mountain Road, Eastport, Fourth Of July Pass, Sherman Pass, Tiger, Deer Park, Kellogg, Boulder Creek Road, Osburn, Mullan, Metaline, and Bonners Ferry. * WHEN...Until 8 AM PDT this morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.

* WHAT...Sub-freezing temperatures as low as 29. * WHERE...Potlatch, Uniontown, Oakesdale, Tekoa, Rosalia, Moscow, Colfax, Genesee, La Crosse, Plummer, and Pullman. * WHEN...Until 8 AM PDT this morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.

* WHAT...Temperatures as low as 34 will result in frost formation. * WHERE...Okanogan, Omak, Grand Coulee, Craigmont, Odessa, Ephrata, Winchester, Worley, Moses Lake, Fairfield, Soldiers Meadow Road, Bridgeport, Creston, Rockford, Downtown Spokane, Ritzville, Disautel Pass, Brewster, Nezperce, Spokane Valley, Nespelem, Oroville, Coulee City, Othello, Tonasket, Coeur d'Alene, Cheney, Badger Mountain Road, Hayden, Quincy, Waterville, Airway Heights, Post Falls, Mansfield, Davenport, Kamiah, Wilbur, and Harrington. * WHEN...Until 8 AM PDT this morning. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered.

* IMPACTS...Any fires that develop could spread rapidly. * AFFECTED AREA...In California...Fire weather zone 280. In Oregon, fire weather zone 618, 619, and 620. This includes portions of the Western Klamath National Forest, Southern Oregon Coast, Western Siskiyou National Forest, and the Illinois Valley. Poor RH recovery and gusty northeast winds will affect ridges overnight, while all of the area will receive gusty northeast winds and low RH in the afternoons. * WIND...Through this morning, east winds 15 to 30 mph with gusts up to 40 mph. This afternoon 10 to 20 mph with gusts up to 30 mph, then increasing to 15 to 25 mph with gusts up to 35 mph tonight into Tuesday morning. * HUMIDITY...Single digits to upper teens in the afternoon. Recoveries only 25 to 50 percent this morning and 20 to 35 percent tonight. * 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 Fire Weather Watch, which is in effect from this evening through Tuesday morning. * IMPACTS...Any fires that develop will likely spread rapidly. * AFFECTED AREA...Fire weather zones 621, 622 and 623. This includes the Siskiyou Mountains, portions of the Rogue River National Forest in the Eastern Rogue Valley region and the Winema National Forest of westernmost Klamath County nearest the Southern Oregon Cascades. * WIND...Tonight into Tuesday morning, east winds 15 to 25 mph with gusts up to 35 mph. * HUMIDITY...Relative humidity recoveries tonight into Tuesday morning of only 20 to 35 percent. * DETAILED URL...View the hazard area in detail at https://www.wrh.noaa.gov/map/?wfo=mfr

* WHAT...Sub-freezing temperatures as low as 30 expected. * WHERE...Pullman, La Crosse, Uniontown, Oakesdale, Colfax, Tekoa, and Rosalia. * WHEN...From 1 AM to 8 AM PDT Monday. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.

* WHAT...Temperatures as low as 32 will result in frost formation. * WHERE...Othello, Moses Lake, Coulee City, Creston, Spokane Valley, Fairfield, Airway Heights, Badger Mountain Road, Ephrata, Harrington, Ritzville, Downtown Spokane, Quincy, Mansfield, Grand Coulee, Davenport, Rockford, Wilbur, Cheney, Odessa, and Waterville. * WHEN...From 1 AM to 8 AM PDT Monday. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered.