Aggregator

A thin layer of below freezing temperatures is trapped in the Hood River Valley this morning as light rainfall begins to increase across the region. Patchy freezing rain has been reported by the cites of Parkdale, Glenwood, and Odell. Temperatures will be slow to warm heading into the midday hours allowing light freezing rain to continue until 1200-1300 PST. Light ice accumulations of 0.02-0.06 inches this morning may impact travel and make surfaces slick. Slippery road conditions are difficult to see and can catch driver off guard, increasing the risk of car accidents; use caution.

* WHAT...An extended period of stagnant air, with light winds and little vertical mixing. This is due to an inversion near the surface that will continue to trap pollutants in valleys. * WHERE...Portions of south central, southwest, and west central Idaho and northeast and southeast Oregon. * WHEN...Until 5 PM MST /4 PM PST/ this afternoon. * IMPACTS...Poor air quality may cause issues for people with respiratory problems.

* WHAT...For the Air Stagnation Advisory in valleys, an extended period of stagnant air, with light winds and little vertical mixing. This is due to an inversion near the surface that will continue to trap pollutants. For the Dense Fog Advisory, visibility less than one mile in dense fog. * WHERE...Lower Treasure Valley Zones, and Upper Weiser River. * WHEN...For the Air Stagnation Advisory, until 5 PM MST this afternoon. For the Dense Fog Advisory, until 11 AM MST this morning. * IMPACTS...Poor air quality may cause issues for people with respiratory problems. Low visibility could make driving conditions hazardous.

* WHAT...For the Air Stagnation Advisory in valleys, an extended period of stagnant air, with light winds and little vertical mixing. This is due to an inversion near the surface that will continue to trap pollutants. For the Dense Fog Advisory, visibility less than one mile in dense fog. * WHERE...Lower Treasure Valley Zones, and Upper Weiser River. * WHEN...For the Air Stagnation Advisory, until 5 PM MST this afternoon. For the Dense Fog Advisory, until 11 AM MST this morning. * IMPACTS...Poor air quality may cause issues for people with respiratory problems. Low visibility could make driving conditions hazardous.

* WHAT...Heavy snow expected at or above elevations greater than 3000 ft. Total snow accumulations between 10 and 16 inches. Winds gusting as high as 40 mph. * WHERE...West Slopes North Cascades and Passes and West Slopes North Central Cascades and Passes. * WHEN...From 4 PM this afternoon to 4 PM PST Sunday. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous. Travel could be very difficult to impossible. * ADDITIONAL DETAILS...Expect 6 to 10 inches of snow at Snoqualmie Pass. Stevens and Snoqualmie Passes are observing freezing rain early this morning. Expect slick roads prior to the transition to snow and onset of snow on roadways.

* WHAT...Snow expected at or above elevations greater than 3000 ft. Total snow accumulations between 6 to 10 inches. Winds gusting as high as 45 mph. * WHERE...West Slopes South Central Cascades and Passes. * WHEN...From 4 PM this afternoon to 4 PM PST Sunday. * IMPACTS...Plan on slippery road conditions. * ADDITIONAL DETAILS...Freezing rain may mix in prior to the transition to snow. This will cause slick roadways prior to the onset of snow onto roadways.

* WHAT...Snow expected. Total snow accumulations up to 10 inches. Winds gusting as high as 40 mph. * WHERE...Upper Slopes of the Eastern Washington Cascades Crest. * WHEN...From 4 PM this afternoon to 4 PM PST Sunday. * IMPACTS...Periods of moderate to heavy snow will cause low visibilities and create difficult driving conditions.

* WHAT...Snow expected. Total snow accumulations of 5 to 9 inches. Winds gusting as high as 40 mph. * WHERE...In Oregon, Northern Blue Mountains of Oregon. In Washington, Northwest Blue Mountains. * WHEN...From 4 PM this afternoon to 4 PM PST Sunday. * IMPACTS...Periods of moderate and heavy snow will cause low visibilities to create difficult driving conditions.

* WHAT...Freezing rain. Additional ice accumulations around a light glaze. Winds gusting as high as 30 mph. * WHERE...Kittitas Valley and Lower Slopes of the Eastern Washington Cascades Crest. * WHEN...Until 4 PM PST this afternoon. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous.

* WHAT...Snow expected. Total snow accumulations of 5 to 9 inches. Winds gusting as high as 40 mph. * WHERE...In Oregon, Northern Blue Mountains of Oregon. In Washington, Northwest Blue Mountains. * WHEN...From 4 PM this afternoon to 4 PM PST Sunday. * IMPACTS...Periods of moderate and heavy snow will cause low visibilities to create difficult driving conditions.

* WHAT...South winds 25 to 35 mph with gusts 45 to 50 mph expected for Ladd and Pyles Canyons. * WHERE...Grande Ronde Valley. * WHEN...Until 4 PM PST this afternoon. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result.

* WHAT...Visibility 1/2 mile or less in freezing fog. * WHERE...Foothills of the Northern Blue Mountains of Oregon. * WHEN...Until 11 AM PST this morning. * IMPACTS...Low visibility could make driving conditions hazardous. * ADDITIONAL DETAILS...Areas of dense fog, especially along Interstate 84 around Pendleton, could make for hazardous driving conditions. Additionally, below freezing temperatures may create slick spots on roadways.

* WHAT...Visibility less than a quarter mile in freezing fog. * WHERE...North Central Oregon. * WHEN...Until 11 AM PST this morning. * IMPACTS...Low visibility could make driving conditions hazardous.

* WHAT...An extended period of stagnant air, with light winds and little vertical mixing. This is due to an inversion near the surface that will continue to trap pollutants in valleys. * WHERE...Portions of south central, southwest, and west central Idaho and northeast and southeast Oregon. * WHEN...Until 5 PM MST /4 PM PST/ this afternoon. * IMPACTS...Poor air quality may cause issues for people with respiratory problems.

* WHAT...For the Air Stagnation Advisory in valleys, an extended period of stagnant air, with light winds and little vertical mixing. This is due to an inversion near the surface that will continue to trap pollutants. For the Dense Fog Advisory, visibility less than one mile in dense fog. * WHERE...Portions of southwest and west central Idaho and southeast Oregon. * WHEN...For the Air Stagnation Advisory, until 5 PM MST this afternoon. For the Dense Fog Advisory, until 11 AM MST this morning. * IMPACTS...Poor air quality may cause issues for people with respiratory problems. Low visibility could make driving conditions hazardous.

* WHAT...For the Air Stagnation Advisory in valleys, an extended period of stagnant air, with light winds and little vertical mixing. This is due to an inversion near the surface that will continue to trap pollutants. For the Dense Fog Advisory, visibility less than one mile in dense fog. * WHERE...Portions of southwest and west central Idaho and southeast Oregon. * WHEN...For the Air Stagnation Advisory, until 5 PM MST this afternoon. For the Dense Fog Advisory, until 11 AM MST this morning. * IMPACTS...Poor air quality may cause issues for people with respiratory problems. Low visibility could make driving conditions hazardous.

* WHAT...Mixed precipitation expected. Total snow accumulations up to one inch. Freezing rain possible which may cause slick roads. Ice accumulations under 0.10 inch. * WHERE...Lower Treasure Valley Zones, and Malheur County. * WHEN...From 5 PM MST /4 PM PST/ this afternoon to 5 AM MST /4 AM PST/ Sunday. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous. Plan on slippery road conditions.

* WHAT...Heavy mixed precipitation expected. Freezing rain and light snow is expected first through Saturday morning with ice accumulations up to a quarter of an inch. Snow then becomes heavier with Total snow accumulations up to 12 to 18 inches tonight into Sunday. Winds gusting as high as 35 mph. * WHERE...Holden Village, Stevens Pass, and Stehekin. * WHEN...Until 4 PM PST Sunday. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous.

* WHAT...Mixed precipitation expected. Total snow and sleet accumulations of 2 to 6 inches over the mountains and ice accumulations around 0.10 to 0.20 inches. * WHERE...Tiger, Sandpoint, Northport, Springdale-Hunters Road, Ione, Eastport, Kettle Falls, Priest River, Fruitland, Metaline, Colville, Athol, Deer Park, Chewelah, Flowery Trail Road, Clark Fork, Newport, Bonners Ferry, Metaline Falls, Orin-Rice Road, and Schweitzer Mountain Road. * WHEN...Until 10 PM PST this evening. * IMPACTS...Travel could be very difficult. * ADDITIONAL DETAILS...Additional light snow is expected in the mountains through Sunday morning.

* WHAT...Moderate mixed precipitation expected. Freezing rain and light snow is expected this morning with ice accumulations up to a quarter of an inch. Snow then becomes heavier with Total snow accumulations of 4 to 8 inches tonight into Sunday near the Cascade Crest . Winds gusting as high as 35 mph. * WHERE...Mazama, Loup Loup Pass, Winthrop, Methow, Plain, Twisp, Leavenworth, and Conconully. * WHEN...Until 7 PM PST this evening. * IMPACTS...Plan on slippery road conditions.