* WHAT...Snow expected. From 4500 feet to 5000 feet, total snow
accumulation 3 to 8 inches. Above 5000 feet, total snow
accumulations of 10 to 18 inches. Winds gusting 25 to 45 mph
tonight into Thursday.
* WHERE...West Slopes of the Northern and Central Oregon
Cascades, and South Washington Cascades.
* WHEN...From 1 PM this afternoon to 10 PM PST Thursday.
* IMPACTS...Travel could be very difficult.
* WHAT...South winds 20 to 30 mph with gusts up to 50 mph expected
for the base of the northern Blue Mountains of Oregon and
Washington.
* WHERE...In Oregon, Foothills of the Northern Blue Mountains of
Oregon. In Washington, Foothills of the Blue Mountains of
Washington.
* WHEN...From 10 PM this evening to 10 AM PST Thursday.
* IMPACTS...Gusty winds will blow around unsecured objects. Tree
limbs could be blown down and a few power outages may result.
* WHAT...Visibility one quarter mile or less in dense fog.
* WHERE...Yakima Valley.
* WHEN...Until 10 AM PST this morning.
* IMPACTS...Low visibility could make driving conditions hazardous.
* WHAT...Heavy snow expected for elevations above 3000 feet. Total
snow accumulations between 6 and 18 inches.
* WHERE...Upper Slopes of the Eastern Washington Cascades Crest.
* WHEN...From 1 PM this afternoon to 10 PM PST Thursday.
* IMPACTS...Heavy snowfall and very low visibility will create
extremely dangerous driving conditions.
* WHAT...Wet snow expected above 4000 feet. Total snow accumulations
up to 8 to 10 inches. Winds gusting as high as 45 mph.
* WHERE...In Oregon, Northern Blue Mountains of Oregon. In
Washington, Northwest Blue Mountains.
* WHEN...From 10 PM this evening to 4 PM PST Thursday.
* IMPACTS...Periods of moderate and heavy snow will combine with low
visibilities to create difficult driving conditions. Gusty winds
could bring down tree branches.
* WHAT...Heavy snow expected for elevations above 3000 feet. Total
snow accumulations up to 6 to 12 inches.
* WHERE...Lower Slopes of the Eastern Washington Cascades Crest.
* WHEN...From 4 PM this afternoon to 10 AM PST Thursday.
* IMPACTS...Periods of moderate and heavy snow will combine with low
visibilities to create difficult driving conditions.
* WHAT...South winds of 20 to 30 mph with gusts 45 to 55 mph
tonight. After 3 am Thursday, winds will become west to southwest
20 to 30 mph with gusts 55 to 65 mph. These strong winds will be
primarily across the higher terrain. Winds will gradually ease
after 9 am.
* WHERE...Willapa Hills.
* WHEN...From midnight tonight to 10 AM PST Thursday.
* IMPACTS...Damaging winds may blow down trees and power lines. Some
power outages are expected. Travel will be difficult, especially
for high profile vehicles.
* WHAT...South winds 20 to 30 mph with gusts 55 to 65 mph are
expected along the headlands and open exposed areas like the
beaches. Elsewhere, expect gusts of 45 to 55 mph.
* WHERE...In Oregon, Clatsop County Coast. In Washington, South
Washington Coast.
* WHEN...From 10 PM this evening to 8 AM PST Thursday.
* IMPACTS...Damaging winds may blow down trees and power lines. Some
power outages are expected. Travel will be difficult, especially
for high profile vehicles.
* ADDITIONAL DETAILS...Expect two bursts of strong winds. First,
ahead of the cold front as it moves ashore around 2 am Thursday.
Then, winds ease a bit, then another burst of strong west to
southwest winds from 4 to 8 am as low pressure north of the region
moves inland.
* WHAT...Visibility one quarter mile or less in dense fog. A light
glaze of ice with freezing fog.
* WHERE...Wilbur, Creston, Harrington, Quincy, Coulee City, Moses
Lake, Othello, Grand Coulee, Odessa, Ephrata, and Ritzville.
* WHEN...Until 11 AM PST Wednesday.
* IMPACTS...Low visibility and ice formation from freezing fog may
result in hazardous driving conditions.
...MODERATE TO HEAVY SNOW CHRISTMAS AFTERNOON THROUGH THURSDAY
ACROSS THE CASCADES...
.A winter system will move across the region during the afternoon
into evening on Christmas and bring widespread mountain snow to the
Cascades through Thursday.
* WHAT...Heavy snow expected for elevations above 3000 feet. Total
snow accumulations between 6 and 18 inches.
* WHERE...Upper Slopes of the Eastern Washington Cascades Crest.
* WHEN...From 1 PM Wednesday to 10 PM PST Thursday.
* IMPACTS...Heavy snowfall and very low visibility will create
extremely dangerous driving conditions.
...MODERATE TO HEAVY SNOW CHRISTMAS AFTERNOON THROUGH THURSDAY
ACROSS THE CASCADES...
.A winter system will move across the region during the afternoon
into evening on Christmas and bring widespread mountain snow to the
Cascades through Thursday.
* WHAT...Heavy snow expected for elevations above 3000 feet. Total
snow accumulations up to 6 to 12 inches.
* WHERE...Lower Slopes of the Eastern Washington Cascades Crest.
* WHEN...From 4 PM Wednesday to 10 AM PST Thursday.
* IMPACTS...Periods of moderate and heavy snow will combine with low
visibilities to create difficult driving conditions.
* WHAT...Heavy snow expected at or above elevations greater than
3500 ft. Total snow accumulations between 1 to 3 feet. Winds
gusting as high as 40 mph.
* WHERE...West Slopes North Cascades and Passes, West Slopes North
Central Cascades and Passes, and West Slopes South Central
Cascades and Passes.
* WHEN...From 10 AM Wednesday to 10 PM PST Thursday.
* IMPACTS...Roads will likely become slick and hazardous.
Visibilities may be reduced due to falling and blowing snow.
* ADDITIONAL DETAILS...Accumulations of 6 to 12 inches will be
possible for elevations between 3000 to 3500 feet, including
Snoqualmie Pass.
* WHAT...Heavy snow expected at or above elevations greater than
4000 ft. Total snow accumulations between 1 to 3 feet. Winds
gusting as high as 40 mph.
* WHERE...Olympics.
* WHEN...From 7 AM Wednesday to 4 PM PST Thursday.
* IMPACTS...Roads will likely become slick and hazardous.
Visibilities may be reduced due to falling and blowing snow.
* WHAT...Large breaking waves of 17 to 24 feet expected in the
surf zone.
* WHERE...North Coast and Central Coast zones.
* WHEN...From 9 AM Wednesday to 10 PM PST Thursday.
* IMPACTS...Large waves may wash over beaches, jetties, and
other structures unexpectedly. Localized beach erosion is
possible. People can be swept off rocks and jetties, and drown
while observing high surf.
An atmospheric river Wednesday into Thursday is expected to produce
heavy rainfall across parts of the region.
* WHAT...Flooding caused by excessive rainfall continues to be
possible.
* WHERE...A portion of northwest Washington, including the following
county, Clallam.
* WHEN...From Wednesday afternoon through Friday afternoon.
* IMPACTS...Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
* ADDITIONAL DETAILS...
- rainfall accumulations of 4 to 6 inches over the Olympics
expected. Expect rises on rivers and streams due to the heavy
precipitation, and the Bogachiel River may rise above flood
stage Thursday afternoon.
- http://www.weather.gov/safety/flood
* WHAT...South winds 25 to 35 mph with gusts up to 50 mph expected
for the base of the northern Blue Mountains of Oregon and
Washington.
* WHERE...In Oregon, Foothills of the Northern Blue Mountains of
Oregon. In Washington, Foothills of the Blue Mountains of
Washington.
* WHEN...From 10 PM Wednesday to 10 AM PST Thursday.
* IMPACTS...Gusty winds will blow around unsecured objects. Tree
limbs could be blown down and a few power outages may result.
* WHAT...Visibility of one-quarter mile or less in dense fog.
* WHERE...Yakima Valley.
* WHEN...Until 10 AM PST Wednesday.
* IMPACTS...Low visibility could make driving conditions hazardous.
Patchy dense fog has developed in the Yakima Valley this evening
and is affecting portions of Interstate 82. Visibilities of one-
quarter mile or less have been observed. Motorists should be
prepared for sudden changes in visibility. If you encounter dense
fog, slow down and use low-beam headlights.
...The Flood Warning continues for the following rivers in
Washington...
Skokomish River At Potlatch affecting Mason County.
.The river is expected to remain in minor flood stage through early
Thursday morning. Additional rounds of precipitation are expected to
bring the river back into moderate flood stage early Thursday
morning.
* WHAT...Minor flooding is occurring and moderate flooding is
forecast.
* WHERE...Skokomish River at Potlatch.
* WHEN...Until further notice.
* IMPACTS...At 17.5 feet, the Skokomish River will cause moderate
flooding, with deep and quick flood waters inundating some
residential areas, many roads, and much of the farm land in the
Skokomish Valley. Inundated roads include the Skokomish Valley
road, Bourgault Road West, Purdy Cutoff Road, and Highway 106.
* ADDITIONAL DETAILS...
- At 3:30 PM PST Tuesday the stage was 16.7 feet.
- Flood stage is 16.5 feet.
- Recent Activity...The maximum river stage in the 24 hours
ending at 3:30 PM PST Tuesday was 16.9 feet.
- Forecast...The river is expected to remain in minor flood
stage through early Thursday morning. The river will then
rise into moderate flood stage Thursday.
- Flood History...This crest compares to a previous crest of
16.7 feet on 01/04/2003.
- http://www.weather.gov/safety/flood
* WHAT...Heavy snow expected at or above elevations greater than
3500 ft. Total snow accumulations between 1 to 3 feet with lower
amounts possible for Snoqualmie. Winds gusting as high as 40 mph.
* WHERE...West Slopes North Cascades and Passes, West Slopes North
Central Cascades and Passes, and West Slopes South Central
Cascades and Passes.
* WHEN...From 10 AM Wednesday to 10 PM PST Thursday.
* IMPACTS...Roads will likely become slick and hazardous.
Visibilities may be reduced due to falling and blowing snow.
* ADDITIONAL DETAILS...Accumulations of 6 to 12 inches will be
possible for elevations between 3000 to 3500 feet, including
Snoqualmie Pass.
