* WHAT...Mixed precipitation expected. Total snow and sleet
accumulations of 2 to 6 inches over the mountains, up to 2 inches
of snow near the Canadian border, and additional ice accumulations
around 0.10 inches.
* WHERE...Bonners Ferry, Springdale-Hunters Road, Athol, Sandpoint,
Clark Fork, Tiger, Metaline, Deer Park, Ione, Eastport, Flowery
Trail Road, Newport, Orin-Rice Road, Schweitzer Mountain Road,
Northport, Priest River, Fruitland, Chewelah, Colville, Kettle
Falls, and Metaline Falls.
* WHEN...Until 10 PM PST this evening.
* IMPACTS...Plan on slippery road conditions.
* ADDITIONAL DETAILS...Additional light snow is expected through
Sunday morning.
* WHAT...Moderate mixed precipitation expected. Freezing rain 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.
* WHERE...Loup Loup Pass, Leavenworth, Twisp, Conconully, Methow,
Winthrop, Mazama, and Plain.
* WHEN...Until 7 PM PST this evening.
* IMPACTS...Roads, and especially bridges and overpasses, will
likely become slick.
* WHAT...Mixed precipitation expected. Total ice accumulations of a
tenth of an inch or less. Snow accumulation up to 1 inch around
the West Plains this afternoon and evening.
* WHERE...Portions of Central, East Central, North Central, and
Northeast Washington.
* WHEN...Until 7 PM PST this evening.
* IMPACTS...Plan on slippery road conditions.
* ADDITIONAL DETAILS...Temperatures will slowly warm above freezing
this morning, but there will continue to be cold pockets where
freezing rain will continue through the afternoon.
* WHAT...South winds 30 to 35 mph with gusts around 45 mph for the
southern Grande Ronde Valley near 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...Fog has decreased and visibility has improved.
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...Lower Treasure Valley Zones, and Upper Weiser River.
* WHEN...Until 5 PM MST this afternoon.
* IMPACTS...Poor air quality may cause issues for people with
respiratory problems.
* 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.
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.