Alert archive / Washington / Winter Storm Warnings in 2021

Winter Storm Warning 14, NWS Seattle, WA

December 7, 2021

NWS Seattle, WA issued this winter storm warning at Dec 7, 2021, 3:04 PM PST. It took effect at Dec 8, 2021, 4:00 AM PST. It was in force for 24 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Dec 7, 2021, 3:04 PM PST (23:04 UTC)
In effect from
Dec 8, 2021, 4:00 AM PST
Expired
Dec 9, 2021, 3:41 AM PST
In force
24 hr
Issued by
NWS Seattle, WA

The text

As transmitted.

301 
WWUS46 KSEW 072304
WSWSEW

URGENT - WINTER WEATHER MESSAGE
National Weather Service Seattle WA
304 PM PST Tue Dec 7 2021

WAZ567>569-080715-
/O.NEW.KSEW.WS.W.0014.211208T1200Z-211209T1800Z/
Cascades of Whatcom and Skagit Counties-
Cascades of Snohomish and King Counties-
Cascades of Pierce and Lewis Counties-
including Newhalem, Stevens Pass, Snoqualmie Pass, Paradise, 
and Longmire
304 PM PST Tue Dec 7 2021

...WINTER STORM WARNING IN EFFECT FROM 4 AM WEDNESDAY TO 10 AM
PST THURSDAY ABOVE 2000 FEET...

* WHAT...Heavy snow expected above 2000 feet. Total snow 
  accumulations of 12 to 18 inches.

* WHERE...Cascade mountains of Whatcom, Skagit Snohomish, King
  Pierce and Lewis Counties, including the Mount Baker Ski Area,
  Stevens Pass, Snoqualmie Pass, the Crystal Mountain Ski Area,
  and Paradise on Mount Rainier.

* WHEN...From 4 AM Wednesday to 10 AM PST Thursday.

* IMPACTS...Plan on difficult travel conditions.

* ADDITIONAL DETAILS...Snow fall rates of 1 to 2 inches per hour
  are possible. Highest snow fall rates and accumulations are
  expected to be between Stevens and Snoqualmie Pass.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. 

For the latest road conditions in Washington state, call 5 1 1.

&&

$$

WAZ513-080715-
/O.NEW.KSEW.WW.Y.0033.211208T1200Z-211209T1300Z/
Olympics-
including Hurricane Ridge
304 PM PST Tue Dec 7 2021

...WINTER WEATHER ADVISORY IN EFFECT FROM 4 AM WEDNESDAY TO 5 AM
PST THURSDAY ABOVE 3000 FEET...

* WHAT...Snow expected above 3000 feet. Total snow accumulations
  of 6 to 9 inches.

* WHERE...Olympic mountains including Hurricane Ridge.

* WHEN...From 4 AM Wednesday to 5 AM PST Thursday.

* IMPACTS...Plan on slippery road conditions.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For the latest road conditions in Washington state, call 5 1 1.

&&

$$

http://www.weather.gov/seattle
4 follow-up statements
026 
WWUS46 KSEW 080651
WSWSEW

URGENT - WINTER WEATHER MESSAGE
National Weather Service Seattle WA
1051 PM PST Tue Dec 7 2021

WAZ567>569-081900-
/O.CON.KSEW.WS.W.0014.211208T1200Z-211209T1800Z/
Cascades of Whatcom and Skagit Counties-
Cascades of Snohomish and King Counties-
Cascades of Pierce and Lewis Counties-
including Newhalem, Stevens Pass, Snoqualmie Pass, Paradise, 
and Longmire
1051 PM PST Tue Dec 7 2021

...WINTER STORM WARNING REMAINS IN EFFECT FROM 4 AM WEDNESDAY TO
10 AM PST THURSDAY ABOVE 2000 FEET...

* WHAT...Heavy snow expected above 2000 feet. Total snow 
  accumulations of 12 to 18 inches.

* WHERE...Cascade mountains of Whatcom, Skagit Snohomish, King
  Pierce and Lewis Counties, including the Mount Baker Ski Area,
  Stevens Pass, Snoqualmie Pass, the Crystal Mountain Ski Area,
  and Paradise on Mount Rainier.

* WHEN...From 4 AM Wednesday to 10 AM PST Thursday.

* IMPACTS...Plan on difficult travel conditions.

* ADDITIONAL DETAILS...Snow fall rates of 1 to 2 inches per hour
  are possible. Highest snow fall rates and accumulations are
  expected to be between Stevens and Snoqualmie Pass..

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. 

For the latest road conditions in Washington state, call 5 1 1.

&&

$$

WAZ513-081900-
/O.CON.KSEW.WW.Y.0033.211208T1200Z-211209T1300Z/
Olympics-
including Hurricane Ridge
1051 PM PST Tue Dec 7 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 4 AM WEDNESDAY
TO 5 AM PST THURSDAY ABOVE 3000 FEET...

* WHAT...Snow expected above 3000 feet. Total snow accumulations
  of 6 to 9 inches.

* WHERE...Olympic mountains including Hurricane Ridge.

* WHEN...From 4 AM Wednesday to 5 AM PST Thursday.

* IMPACTS...Plan on slippery road conditions.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For the latest road conditions in Washington state, call 5 1 1.

&&

$$

http://www.weather.gov/seattle
059 
WWUS46 KSEW 081820
WSWSEW

URGENT - WINTER WEATHER MESSAGE
National Weather Service Seattle WA
1020 AM PST Wed Dec 8 2021

WAZ567-569-081930-
/O.CAN.KSEW.WS.W.0014.000000T0000Z-211209T1800Z/
Cascades of Whatcom and Skagit Counties-
Cascades of Pierce and Lewis Counties-
1020 AM PST Wed Dec 8 2021

...WINTER STORM WARNING IS CANCELLED...

The heaviest and most persistent snow has ended. There may still 
be some moderate to heavy snow showers that move through. These 
will be mostly scattered and short lived. 

$$

WAZ513-081930-
/O.CAN.KSEW.WW.Y.0033.000000T0000Z-211209T1300Z/
Olympics-
1020 AM PST Wed Dec 8 2021

...WINTER WEATHER ADVISORY IS CANCELLED...

The heaviest and most persistent snow has ended for the majority 
of the region. There may still be some moderate to heavy snow 
showers that move through. These will be mostly scattered and 
short lived, particularly for high elevations on the west side of
the mountains. 

$$

WAZ568-090230-
/O.CON.KSEW.WS.W.0014.000000T0000Z-211209T1800Z/
Cascades of Snohomish and King Counties-
including Darrington, Baring, Stevens Pass, Skykomish, 
and Snoqualmie Pass
1020 AM PST Wed Dec 8 2021

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 10 AM PST
THURSDAY ABOVE 2000 FEET...

* WHAT...Heavy snow continued above 2000 feet. Additional snow
  accumulations of 8 to 16 inches.

* WHERE...Cascade mountains of Snohomish and King Counties,
  including Stevens Pass, and Snoqualmie Pass.

* WHEN...Until 10 AM PST Thursday.

* IMPACTS...Plan on difficult travel conditions.

* ADDITIONAL DETAILS...A persistent convergence zone will continue
  to impact the area between and including Stevens and Snoqualmie
  Pass. Snowfall rates of 1 to 2 inches per hour remain possible.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. 

For the latest road conditions in Washington state, call 5 1 1.

&&

$$

http://www.weather.gov/seattle
501 
WWUS46 KSEW 090200
WSWSEW

URGENT - WINTER WEATHER MESSAGE
National Weather Service Seattle WA
600 PM PST Wed Dec 8 2021

WAZ568-091300-
/O.CON.KSEW.WS.W.0014.000000T0000Z-211209T1800Z/
Cascades of Snohomish and King Counties-
including Darrington, Baring, Stevens Pass, Skykomish, 
and Snoqualmie Pass
600 PM PST Wed Dec 8 2021

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 10 AM PST
THURSDAY ABOVE 2000 FEET...

* WHAT...Heavy snow continued above 2000 feet. Additional snow 
  accumulations of 2 to 10 inches.

* WHERE...Cascade mountains and valleys of Snohomish and King 
  Counties, including Darrington, Index, Skykomish, Stevens 
  Pass, and Snoqualmie Pass.

* WHEN...Until 10 AM PST Thursday.

* IMPACTS...Plan on slippery road conditions.

* ADDITIONAL DETAILS...A persistent convergence zone will continue
  to impact the area between and including Stevens and Snoqualmie
  Pass. Snowfall rates of 1 to 2 inches per hour remain possible.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. 

For the latest road conditions in Washington state, call 5 1 1.

&&

$$

http://www.weather.gov/seattle
633 
WWUS46 KSEW 091141
WSWSEW

URGENT - WINTER WEATHER MESSAGE
National Weather Service Seattle WA
341 AM PST Thu Dec 9 2021

WAZ568-100000-
/O.CAN.KSEW.WS.W.0014.000000T0000Z-211209T1800Z/
/O.NEW.KSEW.WW.Y.0034.211209T1141Z-211210T0600Z/
/O.NEW.KSEW.WS.A.0008.211211T0600Z-211212T0600Z/
Cascades of Snohomish and King Counties-
including Stevens Pass and Snoqualmie Pass
341 AM PST Thu Dec 9 2021

...WINTER WEATHER ADVISORY IN EFFECT UNTIL 10 PM PST THIS EVENING
ABOVE 2000 FEET...
...WINTER STORM WATCH IN EFFECT FROM FRIDAY EVENING THROUGH
SATURDAY EVENING ABOVE 3000 FEET...
...WINTER STORM WARNING IS CANCELLED...

* WHAT...For the Winter Weather Advisory above 2000 feet, snow
  continued. Additional snow accumulations of 4 to 10 inches. For
  the Winter Storm Watch above 3000 feet, heavy snow possible.
  Total snow accumulations of 18 to 30 inches possible.

* WHERE...Cascade mountains Snohomish and King Counties, including
  Stevens and Snoqualmie Pass.

* WHEN...For the Winter Weather Advisory, until 10 PM PST this 
  evening. For the Winter Storm Watch, from Friday evening 
  through Saturday evening.

* IMPACTS...Travel could be very difficult in the passes through
  tonight and again Friday night and Saturday.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

Monitor the latest forecasts for updates on this situation. 

For the latest road conditions in Washington state, call 5 1 1.

&&

$$

WAZ567-569-100000-
/O.NEW.KSEW.WS.A.0008.211211T0600Z-211212T0600Z/
Cascades of Whatcom and Skagit Counties-
Cascades of Pierce and Lewis Counties-
including Paradise
341 AM PST Thu Dec 9 2021

...WINTER STORM WATCH IN EFFECT FROM FRIDAY EVENING THROUGH
SATURDAY EVENING ABOVE 3000 FEET...

* WHAT...Heavy snow possible above 3000 feet. Total snow
  accumulations of 18 to 30 inches possible. Winds could gust as 
  high as 40 mph.

* WHERE...Cascade mountains Whatcom and Skagit Counties including
  the Mount Baker Ski Area. The Cascade mountains Pierce and Lewis
  Counties, including the Crystal Mountain Ski Area, White Pass
  and Paradise on Mount Rainier.

* WHEN...From Friday evening through Saturday evening.

* IMPACTS...Travel could be very difficult.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the latest forecasts for updates on this situation. 

&&

$$

http://www.weather.gov/seattle

The office that day

Everything else NWS Seattle, WA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Dec 7, 5:32 AM PSTSmall Craft AdvisorySEW9 days
Dec 7, 1:32 PM PSTGale WarningSEW20 hr
Dec 7, 1:32 PM PSTSmall Craft AdvisorySEW7 hr
Dec 7, 3:04 PM PSTWinter Weather AdvisorySEW19 hr
Dec 7, 3:05 PM PSTCoastal Flood AdvisorySEWSan Juan21 hr

Nearby

Winter Storm Warnings in Washington, 2021Every winter storm warning in 2021

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text.