ESFSEW
A strong frontal system will move across south-central British
Columbia Tuesday night through Wednesday night bringing another
round of moderate to heavy rainfall to western Washington. Storm
total rainfall amounts of 3 to 5 inches are possible across the
Olympics and Cascades with 2 to 3 inches possible across the
lowlands. Snow levels will briefly rise from below 1000 feet on
Tuesday to just above 4000 feet on Wednesday, which will contribute
to greater runoff and snowmelt contributions, particularly over the
Olympics and central Cascades. This will lead to rapid rises in
river and streams across southwestern Washington, especially through
the Skokomish, Chehalis, Skookumchuck, and Newaukum River basins. At
this time, the Skokomish River near Potlatch is the only river
forecast to enter flood stage, though there is a 35% chance for the
Newaukum River near Chehalis to enter flood stage Thursday morning.
* WHAT...Snow. Additional snow accumulations of 2 to 5 inches.
Winds gusting as high as 35 mph.
* WHERE...Eastern Douglas County Foothills, South Central Oregon
Cascades and Siskiyou Mountains and Southern Oregon Cascades.
This includes Willamette Pass, Diamond Lake, Crater Lake, Union
Creek, Lake of the Woods, Howard Prairie, and Mount Ashland.
* WHEN...Until 1 AM PST Tuesday.
* IMPACTS...Travel could be very difficult.
* ADDITIONAL DETAILS....The majority of additional snow will occur
this afternoon. But, accumulating snow flurries may linger
until around 7 AM PST Tuesday.
* View the hazard area in detail at
https://www.wrh.noaa.gov/map/?wfo=mfr
* WHAT...West winds 25 to 35 mph with gusts 45 to 55 mph.
* WHERE...Portions of south central and southwest Idaho and
southeast Oregon.
* WHEN...From 8 AM MST /7 AM PST/ this morning to 5 PM MST /4 PM
PST/ this afternoon.
* IMPACTS...Gusty winds could make driving difficult, especially
for high profile vehicles. Unsecured objects may be blown
around. Tree limbs could be blown down.
* WHAT...Heavy snow above 1500 feet. Additional snow
accumulations of 6 to 12 inches.
* WHERE...Cascade mountains and valleys of Whatcom and Skagit
Counties, including the Mount Baker Ski Area. Cascade
mountains and valleys of Snohomish and King Counties,
including Stevens Pass, and Snoqualmie Pass. Cascade mountains
and valleys of Pierce and Lewis Counties, including the
Crystal Mountain Ski Area, Paradise on Mount Rainier.
* WHEN...Until 4 AM PST Tuesday.
* IMPACTS...Plan on slippery road conditions.
* WHAT...Heavy snow expected. Total snow accumulations of 7 to 10
inches above 3000 feet. Winds gusting as high as 40 mph.
* WHERE...Northeast Blue Mountains.
* WHEN...Through 4 AM PST Tuesday.
* IMPACTS...Motorists should be prepared for winter driving
conditions especially over the mountains.
* WHAT...Snow expected. Expect an additional 2 to 4 inches through
4 PM today.
* WHERE...Holden Village and Stevens Pass.
* WHEN...Through 4 PM Monday afternoon.
* IMPACTS...Motorists should be prepared for winter driving
conditions especially over the Cascade Passes.
* WHAT...Heavy snow expected. Total snow accumulations of 7 to 12
inches above 3000 feet. Winds gusting as high as 35 mph.
* WHERE...Northeast Blue Mountains.
* WHEN...Through 4 AM PST Tuesday.
* IMPACTS...After a few weeks of relatively mild weather, this
storms and additional periods of heavy snow later in the week
will produce hazardous winter conditions in the mountains.
* ADDITIONAL DETAILS...
* WHAT...Heavy snow expected. Expect an additional 4 to 8 inches
through 4 PM today. Gust as high as 45 mph on ridges exposed to
west winds.
* WHERE...Holden Village and Stevens Pass.
* WHEN...Through 4 PM Monday afternoon.
* IMPACTS...Motorists should be prepared for winter driving
conditions especially over the Cascade Passes. Strong winds
could cause damage to trees and isolated power outages.
* WHAT...Snow above 1000 feet. Additional snow accumulations of 2
to 6 inches. Winds could gust as high as 40 mph, mainly on
exposed higher terrain.
* WHERE...Willapa Hills.
* WHEN...Until 1 AM PST Tuesday.
* IMPACTS...Plan on slippery road conditions.
* WHAT...Heavy snow above 1000 feet. Additional snow
accumulations of 5 to 12 inches. Winds gusting as high as 45
mph.
* WHERE...South Washington Cascades and South Washington Cascade
Foothills.
* WHEN...Until 1 AM PST Tuesday.
* IMPACTS...Travel could be very difficult. Patchy blowing snow
could significantly reduce visibility.
* WHAT...Heavy snow above 1000 feet. Additional snow accumulations
of 3 to 10 inches, except 7 to 15 inches above 2500 feet. Winds
gusting as high as 45 mph, mainly on exposed higher terrain.
* WHERE...Northern Oregon Cascade Foothills and Northern Oregon
Cascades.
* WHEN...Until 1 AM PST Tuesday.
* IMPACTS...Travel could be very difficult. Patchy blowing snow
could significantly reduce visibility.
* WHAT...Snow above 1000 feet. Additional snow accumulations of 2
to 6 inches. Winds could gust as high as 40 mph, mainly on
exposed higher terrain.
* WHERE...Coast Range of Northwest Oregon.
* WHEN...Until 1 AM PST Tuesday.
* IMPACTS...Plan on slippery road conditions.
* WHAT...Heavy snow above 1000 feet. Additional snow accumulations
of 3 to 9 inches, except 7 to 19 inches above 2500 feet. Winds
gusting as high as 40 mph, mainly on exposed higher terrain.
* WHERE...Cascade Foothills in Lane County and Cascades in Lane
County.
* WHEN...Until 1 AM PST Tuesday.
* IMPACTS...Travel could be very difficult. Patchy blowing snow
could significantly reduce visibility.
* WHAT...Heavy snow above 1000 feet. Additional snow accumulations
of 2 to 5 inches. Winds gusting as high as 40 mph.
* WHERE...Upper Hood River Valley.
* WHEN...Until 1 AM PST Tuesday.
* IMPACTS...Plan on slippery road conditions. The hazardous
conditions could impact the morning or evening commute.
* WHAT...Snow above 1000 feet. Additional snow accumulations of up
to 5 inches except up to 8 inches above 2000 feet. Winds could
gust as high as 40 mph, mainly on exposed higher terrain.
* WHERE...Central Coast Range of Western Oregon.
* WHEN...Until 1 AM PST Tuesday.
* IMPACTS...Plan on slippery road conditions.
* WHAT...West winds 20 to 35 mph with gusts up to 50 mph
expected.
* WHERE...In California, Northeast Siskiyou and Northwest Modoc
Counties and Modoc County. In Oregon, Central and Eastern Lake
County. This includes Summer Lake, the Warner Mountains,
Winter Rim, Hart Mountains, Tule Lake Wildlife Refuge, and
Likely.
* WHEN...From 1 AM to 10 PM PST Monday.
* IMPACTS...Gusty winds could blow around unsecured objects.
Tree limbs could be blown down and a few power outages may
result.
* ADDITIONAL DETAILS...The strongest winds will occur this
morning and afternoon. Light snow will accompany the gusty winds
with up to an inch for most valley locations, and 2 to 8 inches
in the mountains.
* View the hazard area in detail at
https://www.wrh.noaa.gov/map/?wfo=mfr
* WHAT...Heavy snow expected above 2500 feet. Total snow
accumulations of 3 to 8 inches.
* WHERE...Jackson County. This includes the Highway 227 between
Tiller and Trail, Prospect, Butte Falls, and Dead Indian
Memorial Highway.
* WHEN...From 4 AM Monday to 1 AM PST Tuesday.
* IMPACTS...Travel could be very difficult to impossible. The
hazardous conditions could impact the morning or evening
commute.
* ADDITIONAL DETAILS...Precipitation will begin as rain late
tonight then transition to snow later this morning. Our recent
warm temperatures will likely delay the onset of snow
accumulation on road surfaces.
* View the hazard area in detail at
https://www.wrh.noaa.gov/map/?wfo=mfr
* WHAT...Snow expected. Total snow accumulations of 3 to 8
inches on the higher terrain. Southwest to west winds gusting
as high as 45 mph.
* WHERE...In California, South Central Siskiyou County, North
Central and Southeast Siskiyou County, Northeast Siskiyou and
Northwest Modoc Counties and Modoc County. In Oregon, Central
and Eastern Lake County. This includes Highway 97 near Grass
Lake, Cedar Pass on Highway 299, the Warner Mountains, and the
higher terrain of central Siskiyou County (including Mount
Shasta).
* WHEN...From 4 AM Monday to 1 AM PST Tuesday.
* IMPACTS...Plan on slippery road conditions. The hazardous
conditions could impact the morning or evening commute. Gusty
winds could bring down tree branches.
* ADDITIONAL DETAILS...The heaviest snow is expected late this
morning into tonight. Valley locations will mostly receive up
to an inch of snow. Snow levels will begin near 5000 feet and
fall to valley floors during the event.
* View the hazard area in detail at
https://www.wrh.noaa.gov/map/?wfo=mfr
* WHAT...Heavy snow expected. Total snow accumulations of 3 to 8
inches. Southwest to west winds gusting as high as 40 mph.
* WHERE...Northern and Eastern Klamath County and Western Lake
County. This includes Crescent, Gilchrist, and Chemult.
* WHEN...From 10 PM this evening to 1 AM PST Tuesday.
* IMPACTS...Plan on slippery road conditions. The hazardous
conditions could impact the morning or evening commute.
* ADDITIONAL DETAILS...Snow levels will be at 3000 feet as snow
begins later this morning, but will quickly fall to the valley
floor late tonight. The heaviest snow is expected mid to late
Monday morning.
* View the hazard area in detail at
https://www.wrh.noaa.gov/map/?wfo=mfr
* WHAT...Heavy snow expected. Total snow accumulations of 8 to
22 inches. West winds gusting as high as 40 mph.
* WHERE...Eastern Douglas County Foothills, South Central Oregon
Cascades and Siskiyou Mountains and Southern Oregon Cascades.
This includes Willamette Pass, Diamond Lake, Crater Lake,
Union Creek, Lake of the Woods, Howard Prairie, and Mount
Ashland.
* WHEN...From 10 PM this evening to 1 AM PST Tuesday.
* IMPACTS...Travel could be very difficult to impossible.
* ADDITIONAL DETAILS...The snow level will be at 3000 feet before
sunrise, 2000 feet by this afternoon, then as low as 1000 feet
as snow tapers off late tonight. The heaviest snowfall is
expected during the morning hours. Snow will be favored in the
Cascades, with 3 to 10 inches of snow expected in the Siskiyou
Mountains (including around 3 to 6 inches on Siskiyou Summit).
* View the hazard area in detail at
https://www.wrh.noaa.gov/map/?wfo=mfr