* WHAT...Heavy mixed precipitation expected. Total snow and sleet
accumulations up to one inch and ice accumulations between one
tenth and two tenths of an inch. Winds gusting as high as 45 mph.
* WHERE...Portland Metro Lowlands, Greater Vancouver Metro, and
Portland West Hills and Chehalem Mountain.
* WHEN...From 4 AM Thursday to 10 AM PST Friday.
* IMPACTS...Roads, and especially bridges and overpasses, will
likely become slick and hazardous.
* WHAT...Mixed precipitation expected. Total snow accumulations up
to one inch and ice accumulations around one tenth of an inch.
Winds gusting as high as 35 mph.
* WHERE...South Washington and North and Central Oregon Coast.
* WHEN...From 4 AM Thursday to 4 AM PST Friday.
* IMPACTS...Roads, and especially bridges and overpasses, will
likely become slick and hazardous.
* WHAT...Significant icing expected. Total snow accumulations up to
one inch and ice accumulations up to three tenths of an inch.
* WHERE...Central and Southern Willamette Valley, Central Oregon
Coast Range Lowlands, and Central Oregon Coast Range.
* WHEN...From 10 PM this evening to 4 AM PST Friday.
* IMPACTS...Roads, and especially bridges and overpasses, will
likely become slick and hazardous.
* WHAT...Southeast winds 25 to 40 mph with gusts between 50 and 60
mph expected for the base of the northern Blue Mountains of Oregon.
* WHERE...Base of the Northern Blue Mountain Foothills of Oregon.
* WHEN...From 10 PM this evening to 10 PM PST Thursday.
* IMPACTS...Damaging winds will blow down trees and power lines.
Widespread power outages are expected. Travel will be difficult,
especially for high profile vehicles.
* WHAT...For the Cold Weather Advisory, very cold temperatures as
low as 20 below. For the High Wind Warning, south winds 25 to 40
mph with gusts 50 to 60 mph expected.
* WHERE...Grande Ronde Valley.
* WHEN...For the Cold Weather Advisory, until 7 AM PST Thursday. For
the High Wind Warning, from 10 PM this evening to 10 PM PST
Thursday.
* IMPACTS...Damaging winds will blow down trees and power lines.
Widespread power outages are expected. Travel will be difficult,
especially for high profile vehicles. Frostbite and hypothermia
will occur if unprotected skin is exposed to these temperatures.
Very cold temperatures can lead to hypothermia with prolonged
exposure.
* WHAT...For the Cold Weather Advisory, very cold temperatures as
low as 20 below. For the High Wind Warning, south winds 25 to 40
mph with gusts 50 to 60 mph expected.
* WHERE...Grande Ronde Valley.
* WHEN...For the Cold Weather Advisory, until 7 AM PST Thursday. For
the High Wind Warning, from 10 PM this evening to 10 PM PST
Thursday.
* IMPACTS...Damaging winds will blow down trees and power lines.
Widespread power outages are expected. Travel will be difficult,
especially for high profile vehicles. Frostbite and hypothermia
will occur if unprotected skin is exposed to these temperatures.
Very cold temperatures can lead to hypothermia with prolonged
exposure.
* WHAT...Very cold wind chills as low as 15 below expected.
* WHERE...Blue Mountains of Oregon and Washington, Wallowa County,
Ochoco-John Day Highlands, East Slopes of the Oregon Cascades,
Central Oregon, and Upper Slopes of the Eastern Washington
Cascades Crest.
* WHEN...Until 7 AM PST Thursday.
* IMPACTS...The dangerously cold wind chills as low as 15 below zero
could cause frostbite on exposed skin in as little as 30 minutes.
Frostbite and hypothermia will occur if unprotected skin is
exposed to these temperatures. Very cold temperatures can lead to
hypothermia with prolonged exposure.
* WHAT...Snow expected. Total snow accumulations between 5 and 10
inches. Winds gusting as high as 45 mph.
* WHERE...Blue Mountains of Oregon and Washington.
* WHEN...From 7 AM Thursday to 10 PM PST Friday.
* IMPACTS...Travel could be difficult due to periods of moderate to
heavy snow. Gusty winds could bring down tree branches.
* WHAT...Snow expected. Total snow accumulations between 1 and 3
inches. Winds gusting as high as 50 mph.
* WHERE...Grande Ronde Valley.
* WHEN...From 7 AM Thursday to 10 PM PST Friday.
* IMPACTS...Travel could be difficult due to periods of moderate to
heavy snow. Gusty winds could bring down tree branches.
* ADDITIONAL DETAILS...Blowing snow in the southern portion of the
valley may reduce visibilities to less than half a mile at times
Thursday morning through the afternoon.
* WHAT...Snow expected. Total snow accumulations between 3 and 5
inches. Winds gusting as high as 40 mph.
* WHERE...In Oregon, Foothills of the Northern Blue Mountains of
Oregon. In Washington, Foothills of the Blue Mountains of
Washington.
* WHEN...From 7 AM Thursday to 10 PM PST Friday.
* IMPACTS...Periods of moderate and heavy snow will combine with low
visibilities to create difficult driving conditions. The hazardous
conditions could impact the Thursday morning and evening commutes.
* ADDITIONAL DETAILS...Blowing snow along areas at the base of the
northern Blue Mountain Foothills in Oregon, including Cabbage
Hill, may see visibilities drop to a half mile or less Thursday
morning through Thursday evening.
* WHAT...Snow expected. Total snow accumulations between 5 and 8
inches. Winds gusting as high as 35 mph.
* WHERE...East Slopes of the Oregon Cascades.
* WHEN...From 1 AM Thursday to 4 PM PST Friday.
* IMPACTS...Periods of moderate and heavy snow will combine with low
visibilities to create difficult driving conditions.
* WHAT...Snow expected. Total snow accumulations between 3 and 7
inches. Winds gusting as high as 40 mph.
* WHERE...Ochoco-John Day Highlands.
* WHEN...From 4 AM Thursday to 4 PM PST Friday.
* IMPACTS...Periods of moderate and heavy snow will combine with low
visibilities to create difficult driving conditions.
* ADDITIONAL DETAILS...Blowing snow along US Highway 20 may reduce
visibilities to a half mile or less at times early Thursday
morning through the afternoon.
* WHAT...Snow expected. Total snow accumulations between 1 and 3
inches.
* WHERE...John Day Basin.
* WHEN...From 4 AM Thursday to 4 PM PST Friday.
* IMPACTS...Travel could be difficult due to periods of moderate to
heavy snow.
* WHAT...Snow expected. Total snow accumulations between 2 and 4
inches.
* WHERE...Foothills of the Southern Blue Mountains of Oregon and
Lower Columbia Basin of Oregon.
* WHEN...From 7 AM Thursday to 4 PM PST Friday.
* IMPACTS...Travel could be difficult due to periods of moderate to
heavy snow. The hazardous conditions could impact the Thursday
morning and evening commutes.
* WHAT...Snow expected. Total snow accumulations between 2 and 4
inches.
* WHERE...Central Oregon.
* WHEN...From 1 AM Thursday to 10 AM PST Friday.
* IMPACTS...Travel could be difficult due to periods of moderate to
heavy snow. The hazardous conditions could impact the Thursday
morning and evening commutes.
* WHAT...Snow expected. Total snow accumulations between 1 and 3
inches.
* WHERE...Eastern Columbia River Gorge of Oregon and Washington.
* WHEN...From 7 AM Thursday to 10 AM PST Friday.
* IMPACTS...Travel could be difficult due to periods of moderate to
heavy snow. The hazardous conditions could impact the Thursday
morning and evening commutes.
* WHAT...Snow expected. Total snow accumulations between 2 and 4
inches.
* WHERE...North Central Oregon.
* WHEN...From 4 AM Thursday to 10 AM PST Friday.
* IMPACTS...Travel could be difficult due to periods of moderate to
heavy snow. The hazardous conditions could impact the Thursday
morning and evening commutes.
* WHAT...Snow expected. Total snow accumulations between 6 and 12
inches. Winds gusting as high as 55 mph.
* WHERE...The southern Oregon Cascades and Siskiyou Mountains. This
includes areas from Lake of the Woods northward and higher
portions of the Siskiyou Mountains west of Interstate 5, including
the Mount Ashland Ski road, including portions of Highways 230, 62
and 140.
* WHEN...From 1 AM Thursday to 1 PM PST Friday.
* IMPACTS...Travel could be very difficult to impossible. The
hazardous conditions could impact the Thursday morning and evening
commutes. Gusty winds could bring down tree branches.
* ADDITIONAL DETAILS...Heaviest snowfall accumulations are expected
near Diamond Lake and Crater Lake, especially Thursday morning and
again Thursday evening through Friday morning.
* WHAT...Snow expected. Total snow accumulations between 2 and 4
inches. Winds gusting as high as 40 mph.
* WHERE...Klamath County and Western Lake County, including areas
from Modoc Point northward and areas east of Klamath Falls. This
includes the communities of Chemult, Chiloquin, Beatty, and Bly.
This also includes portions of Highway 97, 140, 66, and 31.
* WHEN...From 1 AM to 2 PM PST Thursday.
* IMPACTS...Plan on slippery road conditions. The hazardous
conditions could impact the Thursday morning commute.
* ADDITIONAL DETAILS...Snow levels will rise from valley floors
early Thursday to around 4500 feet Thursday afternoon. Moderate
snow is likely in the morning on Thursday, then expect some
continued snow across higher terrain in the afternoon. Then, light
snow showers are expected Thursday night and Friday with snow
levels between 4000 and 5000 feet.
* WHAT...Wet snow expected above 1500 feet. Total snow accumulations
up to one inch. Winds gusting as high as 20 mph in valleys and 40
mph over mountains. Lighter snow of a half inch or less is
possible for elevations below 1500 feet elevation.
* WHERE...This includes portions of the Illinois Valley, lower
passes along Interstate 5 north of Grants pass and mountains in
Josephine and eastern Curry counties.
* WHEN...From 10 PM this evening to 8 AM PST Thursday.
* IMPACTS...Plan on slippery road conditions. The hazardous
conditions could impact the Thursday morning commute.
* ADDITIONAL DETAILS...Snow levels are expected to start out around
1200 feet tonight then rise early Thursday morning to around 1500
to 2500 feet, before rising higher to 4000 feet late Thursday
morning. A period of light to moderate snow is expected, then
transitioning to rain for most areas by late Thursday morning. As
snow transitions to rain, there may be a brief period of wintry
mix with ice pellets.
