* WHAT...Heavy snow possible. Total snow accumulations between 6 and
12 inches possible. Winds could gust as high as 40 mph.
* WHERE...Northern Blue Mountains of Oregon and Washington above
4000 feet.
* WHEN...From late tonight through Saturday afternoon.
* IMPACTS...Roads, and especially bridges and overpasses, will
likely become slick and hazardous. Periods of moderate and heavy
snow will combine with low visibilities to create difficult
driving conditions.
* ADDITIONAL DETAILS...Total snowfall accumulations for I-84 along
the Blue Mountains, including Meacham, are only expected to be
around 3 to 5 inches.
* WHAT...Heavy snow possible. Total snow accumulations of 8 to 18
inches possible, heaviest above 3000 feet. Winds could gust as
high as 40 mph.
* WHERE...Upper Slopes of the Eastern Washington Cascades Crest.
* WHEN...From Thursday evening through Saturday afternoon.
* IMPACTS...Heavy snowfall and very low visibility will create
extremely dangerous driving conditions.
* ADDITIONAL DETAILS...Snow levels will start around 2500-3500 feet
Thursday night before rising to 4000-4500 feet Friday afternoon.
Snow levels will then lower to 1500-2000 feet Friday night.
Precipitation will begin as snow for Snoqualmie Pass, before
transitioning to rain Friday afternoon. Rain will then transition
to snow again at Snoqualmie Pass Friday night.
* WHAT...Heavy snow possible. Total snow accumulations between 18
and 30 inches possible.
* WHERE...Stevens Pass.
* WHEN...From Thursday evening through Saturday afternoon.
* IMPACTS...Motorists should be prepared for winter driving
conditions with accumulations up to an inch per hour Friday
morning through Friday evening.
* ADDITIONAL DETAILS...This will be the heaviest snowfall for
Stevens Pass in a couple of weeks.
* WHAT...Heavy snow possible. Total snow accumulations between 3 to
8 inches in the valleys and 1 to 2 feet in the mountains.
* WHERE...Priest River, Northport, Ione, Clark Fork, Deer Park,
Eastport, Flowery Trail Road, Fruitland, Tiger, Newport,
Schweitzer Mountain Road, Athol, Metaline, Orin-Rice Road,
Metaline Falls, Bonners Ferry, Sandpoint, Springdale-Hunters Road,
Kettle Falls, Colville, and Chewelah.
* WHEN...From late Thursday night through Saturday afternoon.
* IMPACTS...This will likely be the first widespread snow event in a
couple of weeks for north Idaho and northeast Washington.
* ADDITIONAL DETAILS...Lowland snow accumulations have the potential
to be widely variable with some locations in southern parts of
Stevens and Pend Orielle counties receiving a couple inches of wet
snow while lowland spots in the northern parts of the county have
the chance for 8 inches or more.
* WHAT...Heavy snow possible at or above elevations greater than
3000 ft. Total snow accumulations between 12 and 30 inches
possible.
* WHERE...West Slopes North Cascades and Passes, West Slopes North
Central Cascades and Passes, and West Slopes South Central
Cascades and Passes.
* WHEN...From Thursday evening through Saturday afternoon.
* IMPACTS...Travel could be very difficult.
* ADDITIONAL DETAILS...Snow levels will start around 2500-3500 feet
Thursday night before rising to 4000 feet Friday afternoon. Snow
levels will then lower to near 2000 feet Friday night.
Precipitation will begin as snow for Snoqualmie Pass, before
transitioning to rain Friday afternoon. Rain will then transition
to snow again at Snoqualmie Pass and increase in intensity Friday
night.
* WHAT...Heavy snow possible above 3000 feet. Total snow
accumulations between 6 and 12 inches, and up to 15 inches above
5000 ft. Winds could gust as high as 40 mph.
* WHERE...South Washington Cascades and the Northern and Central
Cascades of Oregon.
* WHEN...From Thursday evening through Saturday afternoon.
* IMPACTS...Roads, and especially bridges and overpasses, will
likely become slick and hazardous.
* ADDITIONAL DETAILS...Snow levels will start around 4000-5000 ft
Thursday evening into Friday, before lowering to 3000-3500 ft
Friday night.
* WHAT...Stagnant air conditions will have potential to trap
pollutants near the ground.
* WHERE...Portions of North Idaho and Central, North Central, and
Northeast Washington including Spokane, Coeur d'Alene, Kellogg,
Bonners Ferry, Sandpoint, Metaline, Deer Park, Colville, Republic,
Omak, Winchester, Lake Chelan, Wenatchee, Leavenworth, and
Waterville.
* WHEN...Until 4 AM PST Friday.
* IMPACTS...Periods of air stagnation can lead to the buildup of
pollutants near the surface.
* WHAT...Stagnant conditions will have potential to trap pollutants
near the ground with deteriorated air quality.
* WHERE...Clarkston, Lewiston, Peck, Kamiah, Winchester, Alpowa
Summit, Soldiers Meadow Road, Nezperce, Pomeroy, Gifford,
Craigmont, Lapwai, Lewiston Grade, and Culdesac.
* WHEN...Until 4 AM PST Friday.
* IMPACTS...Periods of air stagnation can lead to the buildup of
pollutants near the surface.
* WHAT...Very cold temperatures as low as 24.
* WHERE...Central and Southern Willamette Valley, Tualatin Valley,
and North Clark County Lowlands.
* WHEN...Until 10 AM PST this morning.
* IMPACTS...Hypothermia can occur with prolonged exposure to these
temperatures.
* WHAT...Cold temperatures as low as 25 expected.
* WHERE...Central and Southern Willamette Valley, Tualatin Valley,
and North Clark County Lowlands.
* WHEN...From 10 PM this evening to 10 AM PST Wednesday.
* IMPACTS...Hypothermia can occur with prolonged exposure to these
temperatures.
* WHAT...Poor air quality will continue. This is due to an inversion
and stagnant air conditions near the surface that will continue to
trap pollutants.
* WHERE...Portions of central, north central, and northeast Oregon
and central, south central, and southeast Washington.
* WHEN...Until 4 AM PST Friday.
* IMPACTS...Poor air quality may cause issues for people with
respiratory problems.
* WHAT...Stagnant air conditions will have potential to trap
pollutants near the ground.
* WHERE...Portions of North Idaho and Central, North Central, and
Northeast Washington including Spokane, Coeur d'Alene, Kellogg,
Bonners Ferry, Sandpoint, Metaline, Deer Park, Colville, Republic,
Omak, Winchester, Lake Chelan, Wenatchee, Leavenworth, and
Waterville.
* WHEN...Until 4 AM PST Friday.
* IMPACTS...Periods of air stagnation can lead to the buildup of
pollutants near the surface.
* WHAT...Stagnant conditions will have potential to trap pollutants
near the ground with deteriorated air quality.
* WHERE...Pomeroy, Kamiah, Culdesac, Soldiers Meadow Road, Lewiston,
Peck, Lewiston Grade, Lapwai, Gifford, Nezperce, Alpowa Summit,
Clarkston, Craigmont, and Winchester.
* WHEN...Until 4 AM PST Friday.
* IMPACTS...Periods of air stagnation can lead to the buildup of
pollutants near the surface.
* WHAT...Apparent (feels-like) temperatures as low as 25 expected.
* WHERE...Greater Portland/Vancouver Metro, Central and Southern
Willamette Valley, Lower Columbia River and Cowlitz River Valleys,
and South Washington Cascade Foothills.
* WHEN...Until 10 AM PST this morning.
* IMPACTS...Hypothermia can occur with prolonged exposure to these
temperatures.
* ADDITIONAL DETAILS...Easterly winds through the Columbia River
Gorge with gusts to 25-30 mph in the far eastern
Portland/Vancouver Metro area will lead to warmer temperatures,
but the apparent temperatures will be close to 25 degrees.
* WHAT...Apparent (feels-like) temperatures as low as 25 expected.
* WHERE...Greater Portland/Vancouver Metro, Central and Southern
Willamette Valley, Lower Columbia River and Cowlitz River Valleys,
and South Washington Cascade Foothills.
* WHEN...From 10 PM this evening to 10 AM PST Tuesday.
* IMPACTS...Hypothermia can occur with prolonged exposure to these
temperatures.
* ADDITIONAL DETAILS...Easterly winds through the Columbia River
Gorge with gusts to 25-30 mph in the far eastern
Portland/Vancouver Metro area will lead to warmer temperatures,
but the wind chill will be close to 25 degrees.
* WHAT...Poor air quality will continue. This is due to an inversion
and stagnant air conditions near the surface that will continue to
trap pollutants.
* WHERE...Portions of central, north central, and northeast Oregon
and central, south central, and southeast Washington.
* WHEN...Until 4 AM PST Friday.
* IMPACTS...Poor air quality may cause issues for people with
respiratory problems.
* WHAT...Stagnant air conditions will have potential to trap
pollutants near the ground.
* WHERE...Portions of North Idaho and Central, North Central, and
Northeast Washington including Spokane, Coeur d'Alene, Kellogg,
Bonners Ferry, Sandpoint, Metaline, Deer Park, Colville, Republic,
Omak, Winchester, Lake Chelan, Wenatchee, Leavenworth, and
Waterville.
* WHEN...Until 4 AM PST Friday.
* IMPACTS...Periods of air stagnation can lead to the buildup of
pollutants near the surface.
* WHAT...Stagnant conditions will have potential to trap pollutants
near the ground with deteriorated air quality.
* WHERE...Kamiah, Craigmont, Lapwai, Gifford, Culdesac, Peck,
Clarkston, Winchester, Nezperce, Pomeroy, and Lewiston.
* WHEN...Until 4 AM PST Friday.
* IMPACTS...Periods of air stagnation can lead to the buildup of
pollutants near the surface.
* WHAT...Stagnant conditions will have potential to trap pollutants
near the ground with deteriorated air quality.
* WHERE...Winchester, Clarkston, Craigmont, Lewiston, Kamiah,
Soldiers Meadow Road, Lewiston Grade, Alpowa Summit, Peck, Lapwai,
Pomeroy, Culdesac, Gifford, and Nezperce.
* WHEN...Until 4 PM PST Monday.
* IMPACTS...Periods of air stagnation can lead to the buildup of
pollutants near the surface.
* WHAT...Stagnant conditions will have potential to trap pollutants
near the ground with deteriorated air quality.
* WHERE...Portions of North Idaho and Central, North Central, and
Northeast Washington.
* WHEN...Until 4 PM PST Monday.
* IMPACTS...Periods of air stagnation can lead to the buildup of
pollutants near the surface.
