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Winter Weather Advisory 0021
Issued by the Seattle Forecast Office

Action Issued Starts Expiration
New 2025-12-04 12:54:25 2025-12-05 21:00:00 2025-12-07 00:00:00
Continued 2025-12-04 23:30:22 2025-12-05 21:00:00 2025-12-07 00:00:00
Continued 2025-12-05 08:16:13 2025-12-05 21:00:00 2025-12-07 00:00:00
Upgraded 2025-12-05 14:16:52 2025-12-05 21:00:00 2025-12-07 00:00:00


Action: New
Issued At: 2025-12-04 12:54:25

699 
WWUS46 KSEW 041854
WSWSEW

URGENT - WINTER WEATHER MESSAGE
National Weather Service Seattle WA
1054 AM PST Thu Dec 4 2025

WAZ302-050600-
/O.NEW.KSEW.WW.Y.0021.251206T0300Z-251207T0600Z/
Cascades of Snohomish and Northern King Counties-
Including Stevens Pass
1054 AM PST Thu Dec 4 2025

...WINTER WEATHER ADVISORY IN EFFECT FROM 7 PM FRIDAY TO 10 PM PST 
SATURDAY...

* WHAT...Snow expected. Total snow accumulations up to 5 to 10 
  inches at Stevens Pass. Winds gusting as high as 35 mph.

* WHERE...Cascades of Snohomish and Northern King Counties.

* WHEN...From 7 PM Friday to 10 PM PST Saturday.

* IMPACTS...Travel could be very difficult over the pass. The 
  hazardous conditions could impact the Friday evening commute.

* ADDITIONAL DETAILS...A convergence zone as well as heavy snowfall 
  at times may allow for snowfall rates to meet or exceed 1 inch per 
  hour. Gusty winds will limit visibility at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. Prepare for possible 
power outages. Refer to WSDOT for the latest pass conditions and 
closures.

&&

$$

62


Action: Continued
Issued At: 2025-12-04 23:30:22

603 
WWUS46 KSEW 050529
WSWSEW

URGENT - WINTER WEATHER MESSAGE
National Weather Service Seattle WA
929 PM PST Thu Dec 4 2025

WAZ302-051500-
/O.CON.KSEW.WW.Y.0021.251206T0300Z-251207T0600Z/
Cascades of Snohomish and Northern King Counties-
Including Stevens Pass
929 PM PST Thu Dec 4 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 7 PM FRIDAY TO 10 
PM PST SATURDAY...

* WHAT...Snow expected. Total snow accumulations up to 5 to 10 
  inches at Stevens Pass. Winds gusting as high as 35 mph.

* WHERE...Cascades of Snohomish and Northern King Counties.

* WHEN...From 7 PM Friday to 10 PM PST Saturday.

* IMPACTS...Travel could be very difficult over the pass. The 
  hazardous conditions could impact the Friday evening commute.

* ADDITIONAL DETAILS...A convergence zone as well as heavy snowfall 
  at times may allow for snowfall rates to meet or exceed 1 inch per 
  hour. Gusty winds will limit visibility at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. Prepare for possible 
power outages. Refer to WSDOT for the latest pass conditions and 
closures.

&&

$$

21


Action: Continued
Issued At: 2025-12-05 08:16:13

969 
WWUS46 KSEW 051415
WSWSEW

URGENT - WINTER WEATHER MESSAGE
National Weather Service Seattle WA
615 AM PST Fri Dec 5 2025

WAZ302-052215-
/O.CON.KSEW.WW.Y.0021.251206T0300Z-251207T0600Z/
Cascades of Snohomish and Northern King Counties-
Including Stevens Pass
615 AM PST Fri Dec 5 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 7 PM THIS EVENING 
TO 10 PM PST SATURDAY...

* WHAT...Snow expected. Total snow accumulations up to 6 to 11 
  inches at Stevens Pass. Winds gusting as high as 35 mph.

* WHERE...Cascades of Snohomish and Northern King Counties.

* WHEN...From 7 PM this evening to 10 PM PST Saturday.

* IMPACTS...Travel could be very difficult over the pass. The 
  hazardous conditions could impact the Friday evening commute.

* ADDITIONAL DETAILS...A convergence zone as well as heavy snowfall 
  at times may allow for snowfall rates to meet or exceed 1 inch per 
  hour. Gusty winds will limit visibility at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. Prepare for possible 
power outages. Refer to WSDOT for the latest pass conditions and 
closures.

&&

$$

21


Action: Upgraded
Issued At: 2025-12-05 14:16:52

040 
WWUS46 KSEW 052016
WSWSEW

URGENT - WINTER WEATHER MESSAGE
National Weather Service Seattle WA
1216 PM PST Fri Dec 5 2025

WAZ302-060615-
/O.UPG.KSEW.WW.Y.0021.251206T0300Z-251207T0600Z/
/O.NEW.KSEW.WS.W.0008.251206T0300Z-251207T0600Z/
Cascades of Snohomish and Northern King Counties-
Including Stevens Pass
1216 PM PST Fri Dec 5 2025

...WINTER STORM WARNING IN EFFECT FROM 7 PM THIS EVENING TO 10 PM 
PST SATURDAY...

* WHAT...Heavy snow expected. Total snow accumulations up to 12 to 
  18 inches. Winds gusting as high as 35 mph.

* WHERE...Cascades of Snohomish and Northern King Counties.

* WHEN...From 7 PM this evening to 10 PM PST Saturday.

* IMPACTS...Travel could be very difficult to impossible. The 
  hazardous conditions could impact the Friday evening commute. 
  Gusty winds could bring down tree branches.

* ADDITIONAL DETAILS...A convergence zone as well as heavy snowfall 
  at times may allow for snowfall rates to exceed 1-1.5 inches per 
  hour. Gusty winds will limit visibility at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in 
your vehicle in case of an emergency. Prepare for possible power 
outages.

&&

$$

WAZ304-060615-
/O.NEW.KSEW.WW.Y.0022.251206T0300Z-251207T0300Z/
Cascades of Pierce and Lewis Counties-
Including White Pass, Paradise, Longmire, Ashford, Mount Rainier,
and Crystal Mountain
1216 PM PST Fri Dec 5 2025

...WINTER WEATHER ADVISORY IN EFFECT FROM 7 PM THIS EVENING TO 7 PM 
PST SATURDAY...

* WHAT...Snow expected. Total snow accumulations up to 8 to 12 
  inches. Winds gusting as high as 35 mph.

* WHERE...Cascades of Pierce and Lewis Counties.

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

* IMPACTS...Travel could be very difficult to impossible. The 
  hazardous conditions could impact the Friday evening commute. 
  Gusty winds could bring down tree branches.

* ADDITIONAL DETAILS...Heavy snowfall at times may allow for rates 
  of around 1 inch per hour at times. Gusty winds will limit 
  visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. Prepare for possible 
power outages.

&&

$$

62



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