006
WWUS46 KPDT 172253
WSWPDT
URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE PENDLETON OR
253 PM PST WED DEC 17 2025
ORZ509-181215-
/O.EXT.KPDT.WW.Y.0027.251218T0600Z-251218T1800Z/
EAST SLOPES OF THE OREGON CASCADES-
INCLUDING THE CITIES OF SUNRIVER, CAMP SHERMAN, SISTERS, AND LA
PINE
253 PM PST WED DEC 17 2025
...WINTER WEATHER ADVISORY NOW IN EFFECT FROM 10 PM THIS EVENING TO
10 AM PST THURSDAY...
* WHAT...SNOW. TOTAL SNOW ACCUMULATIONS BETWEEN 4 AND 7 INCHES
EXPECTED. WINDS GUSTING AS HIGH AS 45 MPH.
* WHERE...EAST SLOPES OF THE OREGON CASCADES.
* WHEN...FROM 10 PM THIS EVENING TO 10 AM PST THURSDAY.
* IMPACTS...PLAN ON WINTER WEATHER DRIVING CONDITIONS. PERIODS OF
MODERATE TO HEAVY SNOWFALL AND STRONG WINDS CAN REDUCE VISIBILITY
ALONG US 26 AND US 20.
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.
WAZ522-181215-
/O.CON.KPDT.WW.Y.0027.000000T0000Z-251219T0000Z/
UPPER SLOPES OF THE EASTERN WASHINGTON CASCADES CREST-
INCLUDING THE CITIES OF EASTON AND ROSLYN
253 PM PST WED DEC 17 2025
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 PM PST
THURSDAY...
* WHAT...SNOW AND FREEZING RAIN. ADDITIONAL SNOW ACCUMULATIONS
BETWEEN 4 AND 10 INCHES MOSTLY THROUGH THURSDAY MORNING. FREEZING
RAIN UP TO A TENTH OF AN INCH THURSDAY.
* WHERE...UPPER SLOPES OF THE EASTERN WASHINGTON CASCADES CREST.
* WHEN...UNTIL 4 PM PST THURSDAY.
* IMPACTS...PLAN ON WINTER WEATHER DRIVING CONDITIONS. PERIODS OF
MODERATE TO HEAVY SNOWFALL, STRONG WINDS, AND BLOWING SNOW COULD
SIGNIFICANTLY REDUCE VISIBILITY ALONG I-90 AND US 12. FREEZING
RAIN COULD BRING
SLIPPERY CONDITIONS.
* ADDITIONAL DETAILS...CONFIDENCE IN MORE THAN A TENTH OF AN INCH
FREEZING RAIN THURSDAY IS LOW (LESS THAN 20 PERCENT CHANCE).
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.
WAZ523-181215-
/O.CON.KPDT.WW.Y.0027.000000T0000Z-251219T0000Z/
LOWER SLOPES OF THE EASTERN WASHINGTON CASCADES CREST-
INCLUDING THE CITIES OF CLE ELUM, CLIFFDELL, AND APPLETON
253 PM PST WED DEC 17 2025
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 PM PST
THURSDAY...
* WHAT...SNOW AND FREEZING RAIN. ADDITIONAL SNOW ACCUMULATIONS
BETWEEN 2 AND 6 INCHES MOSTLY THROUGH THURSDAY MORNING. FREEZING
RAIN UP TO A TENTH OF AN INCH THURSDAY.
* WHERE...LOWER SLOPES OF THE EASTERN WASHINGTON CASCADES CREST.
* WHEN...UNTIL 4 PM PST THURSDAY.
* IMPACTS...TRAVEL COULD BE DIFFICULT DUE TO PERIODS OF MODERATE TO
HEAVY SNOW. GUSTY WINDS COULD BRING DOWN TREE BRANCHES. FREEZING
RAIN COULD BRING SLIPPERY CONDITIONS.
* ADDITIONAL DETAILS...CONFIDENCE IN MORE THAN A TENTH OF AN INCH
FREEZING RAIN THURSDAY IS LOW (LESS THAN 20 PERCENT CHANCE).
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.
ORZ502-WAZ030-181215-
/O.CON.KPDT.WW.Y.0027.251218T1200Z-251219T0000Z/
NORTHERN BLUE MOUNTAINS OF OREGON-NORTHWEST BLUE MOUNTAINS-
INCLUDING THE CITIES OF MEACHAM, TOLLGATE, AND SKI BLUEWOOD
RESORT
253 PM PST WED DEC 17 2025
...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 4 AM TO 4 PM PST
THURSDAY...
* WHAT...SNOW EXPECTED. TOTAL SNOW ACCUMULATIONS BETWEEN 3 TO 7
INCHES. FREEZING RAIN UP TO A TENTH OF AN INCH THURSDAY.
* WHERE...IN OREGON, NORTHERN BLUE MOUNTAINS OF OREGON. IN
WASHINGTON, NORTHWEST BLUE MOUNTAINS.
* WHEN...FROM 4 AM TO 4 PM PST THURSDAY.
* IMPACTS...PLAN ON WINTER WEATHER DRIVING CONDITIONS. PERIODS OF
MODERATE TO HEAVY SNOWFALL AND STRONG WINDS CAN REDUCE VISIBILITY
ALONG I-84 AND US82.
* ADDITIONAL DETAILS...CONFIDENCE IN MORE THAN A TENTH OF AN INCH
FREEZING RAIN THURSDAY IS LOW (LESS THAN 30 PERCENT CHANCE).
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SLOW DOWN AND USE CAUTION WHILE TRAVELING. IN OREGON, THE LATEST
ROAD CONDITIONS CAN BE OBTAINED BY VISITING TRIPCHECK.COM ONLINE, OR
BY CALLING 5 1 1. IN WASHINGTON, THE LATEST ROAD CONDITIONS CAN BE
OBTAINED BY VISITING THE WEBSITE WSDOT.WA.GOV/TRAVEL.
MD
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