Alert archive / Washington / Winter Storm Warnings in 2021

Winter Storm Warning 16, NWS Seattle, WA

December 17, 2021

NWS Seattle, WA issued this winter storm warning at Dec 17, 2021, 2:16 PM PST. It took effect at Dec 17, 2021, 10:00 PM 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 17, 2021, 2:16 PM PST (22:16 UTC)
In effect from
Dec 17, 2021, 10:00 PM PST
Expired
Dec 18, 2021, 10:00 PM PST
In force
24 hr
Issued by
NWS Seattle, WA

The text

As transmitted.

374 
WWUS46 KSEW 172216
WSWSEW

URGENT - WINTER WEATHER MESSAGE
National Weather Service Seattle WA
216 PM PST Fri Dec 17 2021

WAZ567>569-181045-
/O.UPG.KSEW.WS.A.0009.211218T0600Z-211219T1800Z/
/O.NEW.KSEW.WS.W.0016.211218T0600Z-211219T1200Z/
Cascades of Whatcom and Skagit Counties-
Cascades of Snohomish and King Counties-
Cascades of Pierce and Lewis Counties-
including Stevens Pass, Snoqualmie Pass, and Paradise
216 PM PST Fri Dec 17 2021

...WINTER STORM WARNING IN EFFECT FROM 10 PM THIS EVENING TO 4 AM
PST SUNDAY ABOVE 3000 FEET...

* WHAT...Heavy snow expected above 3000 feet. Total snow
  accumulations of 10 to 28 inches. Winds gusting as high as 40 
  mph.

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

* WHEN...From 10 PM this evening to 4 AM PST Sunday.

* IMPACTS...Travel could be very difficult.

* ADDITIONAL DETAILS...Frezing rain will be possible at Snoqualmie
  Pass Saturday morning.

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.

&&

$$

WAZ513-181045-
/O.UPG.KSEW.WS.A.0009.211218T0600Z-211219T1800Z/
/O.NEW.KSEW.WW.Y.0036.211218T0300Z-211219T0000Z/
Olympics-
216 PM PST Fri Dec 17 2021

...WINTER WEATHER ADVISORY IN EFFECT FROM 7 PM THIS EVENING TO
4 PM PST SATURDAY ABOVE 4000 FEET...

* WHAT...Snow expected above 4000 feet. Total snow accumulations
  of 4 to 20 inches. Winds gusting as high as 55 mph.

* WHERE...Olympic mountains including Hurricane Ridge.

* WHEN...From 7 PM this evening to 4 PM PST Saturday.

* IMPACTS...Plan on difficult travel conditions. Gusty winds 
  could bring down tree branches.

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
5 follow-up statements
547 
WWUS46 KSEW 172224
WSWSEW

URGENT - WINTER WEATHER MESSAGE
National Weather Service Seattle WA
224 PM PST Fri Dec 17 2021

WAZ567>569-180630-
/O.CON.KSEW.WS.W.0016.211218T0600Z-211219T1200Z/
Cascades of Whatcom and Skagit Counties-
Cascades of Snohomish and King Counties-
Cascades of Pierce and Lewis Counties-
including Stevens Pass, Snoqualmie Pass, and Paradise
224 PM PST Fri Dec 17 2021

...WINTER STORM WARNING REMAINS IN EFFECT FROM 10 PM THIS EVENING
TO 4 AM PST SUNDAY ABOVE 3000 FEET...

* WHAT...Heavy snow expected above 3000 feet. Total snow
  accumulations of 10 to 28 inches. Winds gusting as high as 40 
  mph.

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

* WHEN...From 10 PM this evening to 4 AM PST Sunday.

* IMPACTS...Travel could be very difficult.

* ADDITIONAL DETAILS...Freezing rain will be possible at 
  Snoqualmie Pass Saturday morning.

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.

&&

$$

WAZ513-180630-
/O.CON.KSEW.WW.Y.0036.211218T0300Z-211219T0000Z/
Olympics-
224 PM PST Fri Dec 17 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 7 PM THIS
EVENING TO 4 PM PST SATURDAY ABOVE 4000 FEET...

* WHAT...Snow expected above 4000 feet. Total snow accumulations 
  of 4 to 20 inches. Winds gusting as high as 55 mph.

* WHERE...Olympic mountains including Hurricane Ridge.

* WHEN...From 7 PM this evening to 4 PM PST Saturday.

* IMPACTS...Plan on difficult travel conditions. Gusty winds 
  could bring down tree branches.

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
706 
WWUS46 KSEW 180350
WSWSEW

URGENT - WINTER WEATHER MESSAGE
National Weather Service Seattle WA
750 PM PST Fri Dec 17 2021

WAZ567>569-181800-
/O.CON.KSEW.WS.W.0016.211218T0600Z-211219T1200Z/
Cascades of Whatcom and Skagit Counties-
Cascades of Snohomish and King Counties-
Cascades of Pierce and Lewis Counties-
including Stevens Pass, Snoqualmie Pass, and Paradise
750 PM PST Fri Dec 17 2021

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 4 AM PST SUNDAY
ABOVE 3000 FEET...

* WHAT...Heavy snow expected above 3000 feet. Total snow
  accumulations of 14 to 28 inches. Winds gusting as high as 40 
  mph.

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

* WHEN...From 10 PM this evening to 4 AM PST Sunday.

* IMPACTS...Travel could be very difficult.

* ADDITIONAL DETAILS...Freezing rain will be possible at 
  Snoqualmie Pass Saturday morning.

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.

&&

$$

WAZ513-181800-
/O.CON.KSEW.WW.Y.0036.000000T0000Z-211219T0000Z/
Olympics-
750 PM PST Fri Dec 17 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 PM PST
SATURDAY ABOVE 4000 FEET...

* WHAT...Snow expected above 4000 feet. Total snow accumulations
  of 10 to 20 inches. Winds gusting as high as 55 mph.

* WHERE...Olympic mountains including Hurricane Ridge.

* WHEN...From 7 PM this evening to 4 PM PST Saturday.

* IMPACTS...Plan on difficult travel conditions. Gusty winds 
  could bring down tree branches.


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
386 
WWUS46 KSEW 180448
WSWSEW

URGENT - WINTER WEATHER MESSAGE
National Weather Service Seattle WA
848 PM PST Fri Dec 17 2021

WAZ567>569-181800-
/O.CON.KSEW.WS.W.0016.211218T0600Z-211219T1200Z/
Cascades of Whatcom and Skagit Counties-
Cascades of Snohomish and King Counties-
Cascades of Pierce and Lewis Counties-
including Stevens Pass, Snoqualmie Pass, and Paradise
848 PM PST Fri Dec 17 2021

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 4 AM PST SUNDAY
ABOVE 3000 FEET...

* WHAT...Heavy snow expected above 3000 feet. Total snow 
  accumulations of 14 to 28 inches. Winds gusting as high as 40 
  mph.

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

* WHEN...From 10 PM this evening to 4 AM PST Sunday.

* IMPACTS...Travel could be very difficult.


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.

&&

$$

WAZ503-181500-
/O.EXB.KSEW.WW.Y.0036.000000T0000Z-211218T1500Z/
Western Whatcom County-
including Bellingham, Blaine, Point Roberts, Ferndale, Lynden, 
Sumas, and Sudden Valley
848 PM PST Fri Dec 17 2021

...WINTER WEATHER ADVISORY IN EFFECT UNTIL 7 AM PST SATURDAY...

* WHAT...Snow accumulations of up to 1 to 2 inches. Winds gusting
  as high as 40 mph.

* WHERE...Lowlands of western Whatcom County, including Point
  Roberts, Lummi Island, Bellingham, Lynden and Sumas.

* WHEN...Until 7 AM PST Saturday.

* IMPACTS...Plan on winter travel conditions, especially on less
  traveled roadways. Gusty winds could bring down tree branches.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

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

&&

$$

WAZ513-181800-
/O.CON.KSEW.WW.Y.0036.000000T0000Z-211219T0000Z/
Olympics-
848 PM PST Fri Dec 17 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 PM PST
SATURDAY ABOVE 4000 FEET...

* WHAT...Snow expected above 4000 feet. Total snow accumulations 
  of 10 to 20 inches. Winds gusting as high as 55 mph.

* WHERE...Olympic mountains including Hurricane Ridge.

* WHEN...From 7 PM this evening to 4 PM PST Saturday.

* IMPACTS...Plan on difficult travel conditions. Gusty winds 
  could bring down tree branches.

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
196 
WWUS46 KSEW 181454
WSWSEW

URGENT - WINTER WEATHER MESSAGE
National Weather Service Seattle WA
654 AM PST Sat Dec 18 2021

WAZ503-181600-
/O.EXP.KSEW.WW.Y.0036.000000T0000Z-211218T1500Z/
Western Whatcom County-
including Bellingham, Blaine, Point Roberts, Ferndale, Lynden, 
Sumas, and Sudden Valley
654 AM PST Sat Dec 18 2021

...WINTER WEATHER ADVISORY WILL EXPIRE AT 7 AM PST THIS MORNING...

Precipitation will continue across the region today, however, 
given warming temperatures across the area, expect little to no 
additional snow accumulations.

$$

WAZ567>569-190000-
/O.CON.KSEW.WS.W.0016.000000T0000Z-211219T1200Z/
Cascades of Whatcom and Skagit Counties-
Cascades of Snohomish and King Counties-
Cascades of Pierce and Lewis Counties-
including Stevens Pass, Snoqualmie Pass, and Paradise
654 AM PST Sat Dec 18 2021

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 4 AM PST SUNDAY
ABOVE 3000 FEET...

* WHAT...Heavy snow continues above 3000 feet. Additional snow 
  accumulations of 12 to 22 inches. Winds gusting as high as 45 
  mph.

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

* WHEN...Until 4 AM PST Sunday.

* IMPACTS...Plan on difficult travel conditions.

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.

&&

$$

WAZ513-190000-
/O.CON.KSEW.WW.Y.0036.000000T0000Z-211219T0000Z/
Olympics-
654 AM PST Sat Dec 18 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 PM PST THIS
AFTERNOON ABOVE 4000 FEET...

* WHAT...Snow continues above 4000 feet. Additional snow 
  accumulations of 6 to 9 inches. Winds gusting as high as 50 mph.

* WHERE...Olympic mountains including Hurricane Ridge.

* WHEN...Until 4 PM PST this afternoon.

* IMPACTS...Plan on slippery road conditions. Gusty winds could 
  bring down tree branches.

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
423 
WWUS46 KSEW 182229
WSWSEW

URGENT - WINTER WEATHER MESSAGE
National Weather Service Seattle WA
229 PM PST Sat Dec 18 2021

WAZ567>569-190600-
/O.EXT.KSEW.WS.W.0016.000000T0000Z-211219T0600Z/
Cascades of Whatcom and Skagit Counties-
Cascades of Snohomish and King Counties-
Cascades of Pierce and Lewis Counties-
including Stevens Pass, Snoqualmie Pass, and Paradise
229 PM PST Sat Dec 18 2021

...WINTER STORM WARNING NOW IN EFFECT UNTIL 10 PM PST THIS
EVENING ABOVE 3000 FEET...

* WHAT...Heavy snow continued above 3000 feet. Additional snow
  accumulations of up to 7 inches. Winds gusting as high as 40 
  mph.

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

* WHEN...Until 10 PM PST this evening.

* IMPACTS...Plan on slippery road conditions.

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.

&&

$$

WAZ513-190000-
/O.CON.KSEW.WW.Y.0036.000000T0000Z-211219T0000Z/
Olympics-
229 PM PST Sat Dec 18 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 PM PST THIS
AFTERNOON ABOVE 4000 FEET...

* WHAT...Snow continued above 4000 feet. Additional snow 
  accumulations of up to two inches.

* WHERE...Olympic mountains including Hurricane Ridge.

* WHEN...Until 4 PM PST this afternoon.

* 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

The office that day

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

IssuedProductOfficeCountiesLasted
Dec 17, 2:51 AM PSTGale WarningSEW38 hr
Dec 17, 3:22 AM PSTWinter Storm WatchSEW11 hr
Dec 17, 3:27 AM PSTHigh Wind WarningSEWSan Juan33 hr
Dec 17, 3:27 AM PSTWind AdvisorySEW33 hr
Dec 17, 2:16 PM PSTWinter Weather AdvisorySEW26 hr
Dec 17, 2:41 PM PSTSmall Craft AdvisorySEW4 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.