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Winter Weather Advisory 0029
Issued by the Pendleton Forecast Office

Action Issued Starts Expiration
New 2025-12-21 01:03:40 2025-12-21 02:00:00 2025-12-22 06:00:00
Continued 2025-12-21 01:42:11 2025-12-21 02:00:00 2025-12-22 06:00:00
Continued 2025-12-21 02:48:42 2025-12-22 06:00:00
Area Extended 2025-12-21 02:48:42 2025-12-22 06:00:00
Continued 2025-12-21 16:20:14 2025-12-22 06:00:00
Continued 2025-12-21 16:20:14 2025-12-22 06:00:00
Expired 2025-12-22 05:54:08 2025-12-22 06:00:00


Action: New
Issued At: 2025-12-21 01:03:40

483 
WWUS46 KPDT 210703
WSWPDT

URGENT - WINTER WEATHER MESSAGE
National Weather Service Pendleton OR
1103 PM PST Sat Dec 20 2025

WAZ522-210815-
/O.CON.KPDT.WS.W.0009.000000T0000Z-251221T0800Z/
Upper Slopes of the Eastern Washington Cascades Crest-
Including the cities of Roslyn and Easton
1103 PM PST Sat Dec 20 2025

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT PST 
TONIGHT...

* WHAT...Snow. Additional snow accumulations up to one inch.

* WHERE...Upper Slopes of the Eastern Washington Cascades Crest.

* WHEN...Until midnight PST tonight.

* IMPACTS...Plan on winter weather conditions.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling.

&&

$$

ORZ509-211515-
/O.NEW.KPDT.WW.Y.0029.251221T0800Z-251222T1200Z/
East Slopes of the Oregon Cascades-
Including the cities of Sunriver, La Pine, Camp Sherman, and
Sisters
1103 PM PST Sat Dec 20 2025

...WINTER WEATHER ADVISORY IN EFFECT UNTIL 4 AM PST MONDAY...

* WHAT...Snow expected. Total snow accumulations of 4 to 8 inches.

* WHERE...East Slopes of the Oregon Cascades.

* WHEN...Until 4 AM PST Monday.

* IMPACTS...Travel could be difficult due to periods of moderate to 
  heavy snow.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. The latest road 
conditions can be obtained by visiting tripcheck.com online, or by 
calling 5 1 1.

&&

$$

PDT


Action: Continued
Issued At: 2025-12-21 01:42:11

373 
WWUS46 KPDT 210741
WSWPDT

URGENT - WINTER WEATHER MESSAGE
National Weather Service Pendleton OR
1141 PM PST Sat Dec 20 2025

WAZ522-210845-
/O.EXP.KPDT.WS.W.0009.000000T0000Z-251221T0800Z/
Upper Slopes of the Eastern Washington Cascades Crest-
Including the cities of Roslyn and Easton
1141 PM PST Sat Dec 20 2025

...WINTER STORM WARNING WILL EXPIRE AT MIDNIGHT PST TONIGHT...

$$

ORZ509-212300-
/O.CON.KPDT.WW.Y.0029.251221T0800Z-251222T1200Z/
East Slopes of the Oregon Cascades-
Including the cities of La Pine, Sisters, Sunriver, and Camp
Sherman
1141 PM PST Sat Dec 20 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 AM PST MONDAY...

* WHAT...Snow expected. Total snow accumulations of 4 to 8 inches.

* WHERE...East Slopes of the Oregon Cascades.

* WHEN...Until 4 AM PST Monday.

* IMPACTS...Travel could be difficult due to periods of moderate to 
  heavy snow.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. The latest road 
conditions can be obtained by visiting tripcheck.com online, or by 
calling 5 1 1.

&&

$$

MC


Action: Continued
Issued At: 2025-12-21 02:48:42

330 
WWUS46 KPDT 210847
WSWPDT

URGENT - WINTER WEATHER MESSAGE
National Weather Service Pendleton OR
1247 AM PST Sun Dec 21 2025

WAZ522-212300-
/O.EXA.KPDT.WW.Y.0029.000000T0000Z-251222T1200Z/
Upper Slopes of the Eastern Washington Cascades Crest-
Including the cities of Roslyn and Easton
1247 AM PST Sun Dec 21 2025

...WINTER WEATHER ADVISORY IN EFFECT UNTIL 4 AM PST MONDAY...

* WHAT...Snow. Additional snow accumulations between 5 and 10 inches.

* WHERE...Upper Slopes of the Eastern Washington Cascades Crest.

* WHEN...Until 4 AM PST Monday.

* IMPACTS...Periods of moderate and heavy snow will combine with low 
  visibilities to create difficult driving conditions.

* ADDITIONAL DETAILS...Snow rates will increase through the 
  afternoon, peaking after 4 PM.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. The latest road 
conditions can be obtained by visiting the website 
wsdot.wa.gov/travel.

&&

$$

ORZ509-212300-
/O.CON.KPDT.WW.Y.0029.000000T0000Z-251222T1200Z/
East Slopes of the Oregon Cascades-
Including the cities of La Pine, Sisters, Sunriver, and Camp
Sherman
1247 AM PST Sun Dec 21 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 AM PST MONDAY...

* WHAT...Snow expected. Total snow accumulations of 4 to 8 inches.

* WHERE...East Slopes of the Oregon Cascades.

* WHEN...Until 4 AM PST Monday.

* IMPACTS...Travel could be difficult due to periods of moderate to 
  heavy snow.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. The latest road 
conditions can be obtained by visiting tripcheck.com online, or by 
calling 5 1 1.

&&

$$

MC


Action: Area Extended
Issued At: 2025-12-21 02:48:42

330 
WWUS46 KPDT 210847
WSWPDT

URGENT - WINTER WEATHER MESSAGE
National Weather Service Pendleton OR
1247 AM PST Sun Dec 21 2025

WAZ522-212300-
/O.EXA.KPDT.WW.Y.0029.000000T0000Z-251222T1200Z/
Upper Slopes of the Eastern Washington Cascades Crest-
Including the cities of Roslyn and Easton
1247 AM PST Sun Dec 21 2025

...WINTER WEATHER ADVISORY IN EFFECT UNTIL 4 AM PST MONDAY...

* WHAT...Snow. Additional snow accumulations between 5 and 10 inches.

* WHERE...Upper Slopes of the Eastern Washington Cascades Crest.

* WHEN...Until 4 AM PST Monday.

* IMPACTS...Periods of moderate and heavy snow will combine with low 
  visibilities to create difficult driving conditions.

* ADDITIONAL DETAILS...Snow rates will increase through the 
  afternoon, peaking after 4 PM.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. The latest road 
conditions can be obtained by visiting the website 
wsdot.wa.gov/travel.

&&

$$

ORZ509-212300-
/O.CON.KPDT.WW.Y.0029.000000T0000Z-251222T1200Z/
East Slopes of the Oregon Cascades-
Including the cities of La Pine, Sisters, Sunriver, and Camp
Sherman
1247 AM PST Sun Dec 21 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 AM PST MONDAY...

* WHAT...Snow expected. Total snow accumulations of 4 to 8 inches.

* WHERE...East Slopes of the Oregon Cascades.

* WHEN...Until 4 AM PST Monday.

* IMPACTS...Travel could be difficult due to periods of moderate to 
  heavy snow.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. The latest road 
conditions can be obtained by visiting tripcheck.com online, or by 
calling 5 1 1.

&&

$$

MC


Action: Continued
Issued At: 2025-12-21 16:20:14

023 
WWUS46 KPDT 212219
WSWPDT

URGENT - WINTER WEATHER MESSAGE
National Weather Service Pendleton OR
219 PM PST Sun Dec 21 2025

ORZ509-221200-
/O.CON.KPDT.WW.Y.0029.000000T0000Z-251222T1200Z/
East Slopes of the Oregon Cascades-
Including the cities of Camp Sherman, Sisters, La Pine, and
Sunriver
219 PM PST Sun Dec 21 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 AM PST MONDAY...

* WHAT...Snow expected. Additional 3 to 7 inches of additional 
  accumulation expected.

* WHERE...East Slopes of the Oregon Cascades.

* WHEN...Until 4 AM PST Monday.

* IMPACTS...Travel could be difficult due to periods of moderate to 
  heavy snow.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. The latest road 
conditions can be obtained by visiting tripcheck.com online, or by 
calling 5 1 1.

&&

$$

WAZ522-221200-
/O.CON.KPDT.WW.Y.0029.000000T0000Z-251222T1200Z/
Upper Slopes of the Eastern Washington Cascades Crest-
Including the cities of Easton and Roslyn
219 PM PST Sun Dec 21 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 AM PST MONDAY...

* WHAT...Snow expected. Additional 3 to 7 inches of additional 
  accumulation expected.

* WHERE...Upper Slopes of the Eastern Washington Cascades Crest.

* WHEN...Until 4 AM PST Monday.

* IMPACTS...Travel could be difficult due to periods of moderate to 
  heavy snow.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. The latest road 
conditions can be obtained by visiting the website 
wsdot.wa.gov/travel.

&&

$$

MD


Action: Continued
Issued At: 2025-12-21 16:20:14

023 
WWUS46 KPDT 212219
WSWPDT

URGENT - WINTER WEATHER MESSAGE
National Weather Service Pendleton OR
219 PM PST Sun Dec 21 2025

ORZ509-221200-
/O.CON.KPDT.WW.Y.0029.000000T0000Z-251222T1200Z/
East Slopes of the Oregon Cascades-
Including the cities of Camp Sherman, Sisters, La Pine, and
Sunriver
219 PM PST Sun Dec 21 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 AM PST MONDAY...

* WHAT...Snow expected. Additional 3 to 7 inches of additional 
  accumulation expected.

* WHERE...East Slopes of the Oregon Cascades.

* WHEN...Until 4 AM PST Monday.

* IMPACTS...Travel could be difficult due to periods of moderate to 
  heavy snow.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. The latest road 
conditions can be obtained by visiting tripcheck.com online, or by 
calling 5 1 1.

&&

$$

WAZ522-221200-
/O.CON.KPDT.WW.Y.0029.000000T0000Z-251222T1200Z/
Upper Slopes of the Eastern Washington Cascades Crest-
Including the cities of Easton and Roslyn
219 PM PST Sun Dec 21 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 AM PST MONDAY...

* WHAT...Snow expected. Additional 3 to 7 inches of additional 
  accumulation expected.

* WHERE...Upper Slopes of the Eastern Washington Cascades Crest.

* WHEN...Until 4 AM PST Monday.

* IMPACTS...Travel could be difficult due to periods of moderate to 
  heavy snow.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. The latest road 
conditions can be obtained by visiting the website 
wsdot.wa.gov/travel.

&&

$$

MD


Action: Expired
Issued At: 2025-12-22 05:54:08

003 
WWUS46 KPDT 221153
WSWPDT

URGENT - WINTER WEATHER MESSAGE
National Weather Service Pendleton OR
353 AM PST Mon Dec 22 2025

ORZ509-WAZ522-221300-
/O.EXP.KPDT.WW.Y.0029.000000T0000Z-251222T1200Z/
East Slopes of the Oregon Cascades-Upper Slopes of the Eastern
Washington Cascades Crest-
Including the cities of Roslyn, Sunriver, Camp Sherman, La Pine,
Easton, and Sisters
353 AM PST Mon Dec 22 2025

...WINTER WEATHER ADVISORY WILL EXPIRE AT 4 AM PST EARLY THIS 
MORNING...

There may be some lingering snow showers for the next hour or so, 
but little additional accumulation is expected.

$$

LN



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