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WWUS46 KMFR 212105
WSWMFR
URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE MEDFORD OR
105 PM PST SUN DEC 21 2025
..HIGH IMPACT WINTER STORM FOR SISKIYOU COUNTY
.A HIGH IMPACT WINTER STORM WILL LIKELY BRING TWO WAVES OF HEAVY
SNOWFALL TO SISKIYOU COUNTY ABOVE 4500 FEET. THE SNOW LEVEL WILL
START AROUND 5500 FEET, ALTHOUGH IT WILL GRADUALLY LOWER THROUGH THE
WEEK.
ORZ027-028-220515-
/O.CON.KMFR.WW.Y.0019.000000T0000Z-251222T1200Z/
SOUTH CENTRAL OREGON CASCADES-SISKIYOU MOUNTAINS AND SOUTHERN
OREGON CASCADES-
INCLUDING THE FOLLOWING LOCATIONS...CRATER LAKE AND DIAMOND LAKE
105 PM PST SUN DEC 21 2025
..WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 AM PST MONDAY
* WHAT...SNOW. ADDITIONAL SNOW ACCUMULATIONS 1 TO 8 INCHES. WINDS
GUSTING AS HIGH AS 40 MPH OVER HIGH AND EXPOSED TERRAIN.
* WHERE...THE SOUTHERN OREGON CASCADES AND SISKIYOU MOUNTAINS.
INCLUDING THE LOCATIONS OF...DIAMOND LAKE.
THIS ALSO INCLUDES THE FOLLOWING PASSES OR NOTABLE LOCATIONS...
DIAMOND LAKE JUNCTION ON STATE HIGHWAYS 230 & 138 AT 4478 FT.
CRATER LAKE NATIONAL PARK AT 6100 FT.
WILLAMETTE PASS ON STATE HIGHWAY 58 AT 5090 FT.
* WHEN...UNTIL 4 AM PST MONDAY.
* IMPACTS...ROADS, AND ESPECIALLY BRIDGES AND OVERPASSES, WILL
LIKELY BECOME SLICK AND HAZARDOUS. PLAN ON SLIPPERY ROAD
CONDITIONS AND DELAYS IN YOUR COMMUTE.
* ADDITIONAL DETAILS...PROBABILITY OF SNOW ACCUMULATION
BETWEEN 4 AM SATURDAY TO 4 AM MONDAY.
PROBABILITIES DON'T ALWAYS OVERLAP THE HAZARD'S TIME RANGE.
LOCATION >= >= >=
8IN 12IN 18IN
-------- ---- ---- ----
DIAMOND 19% 5% 1%
LAKE
JUNCTION
CRATER 64% 35% 9%
LAKE
VISIT WEATHER.GOV/MFR/WINTER FOR ADDITIONAL SNOW PROBABILITIES
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SLOW DOWN AND USE CAUTION WHILE TRAVELING. CALL 511 OR VISIT
TRIPCHECK.COM FOR ROAD INFORMATION.
BE PREPARED FOR SLIPPERY ROADS. SLOW DOWN AND USE CAUTION WHILE
DRIVING. IF YOU ARE GOING OUTSIDE, WATCH YOUR FIRST FEW STEPS TAKEN
ON STAIRS, SIDEWALKS, AND DRIVEWAYS. THESE SURFACES COULD BE ICY AND
SLIPPERY, INCREASING YOUR RISK OF A FALL AND INJURY.
CAZ080-082>084-220515-
/O.NEW.KMFR.WS.A.0007.251223T1200Z-251226T1800Z/
WESTERN SISKIYOU COUNTY-SOUTH CENTRAL SISKIYOU COUNTY-NORTH
CENTRAL AND SOUTHEAST SISKIYOU COUNTY-NORTHEAST SISKIYOU AND
NORTHWEST MODOC COUNTIES-
INCLUDING THE FOLLOWING LOCATIONS...BRAY AND TENNANT
105 PM PST SUN DEC 21 2025
...WINTER STORM WATCH IN EFFECT FROM LATE MONDAY NIGHT THROUGH
FRIDAY MORNING ELEVATIONS ABOVE 4500 FEET IN SISKIYOU COUNTY...
* WHAT...HEAVY SNOW POSSIBLE ABOVE 4500 FEET IN SISKIYOU COUNTY.
TOTAL SNOW ACCUMULATIONS 1 TO 5 FEET POSSIBLE. WINDS COULD GUST AS
HIGH AS 60 MPH OVER HIGH AND EXPOSED TERRAIN. THE HIGHER SNOW
ACCUMULATION TOTALS WILL BE WELL ABOVE THE AVERAGE SNOW LEVEL OF
4500 FEET.
* WHERE...ELEVATIONS ABOVE 4500 FEET IN SISKIYOU COUNTY.
* WHEN...FROM LATE MONDAY NIGHT THROUGH FRIDAY MORNING.
* IMPACTS...TRAVEL MAY BE VERY DIFFICULT TO IMPOSSIBLE. THE
HAZARDOUS CONDITIONS COULD IMPACT THE TUESDAY MORNING AND EVENING
COMMUTES. GUSTY WINDS COULD BRING DOWN TREE BRANCHES. POCKETS OF
POWER OUTAGES ARE LIKELY.
* ADDITIONAL DETAILS...VISIT WEATHER.GOV/MFR/WINTER FOR ADDITIONAL
SNOW PROBABILITIES
PRECAUTIONARY/PREPAREDNESS ACTIONS...
MONITOR THE LATEST FORECASTS FOR UPDATES ON THIS SITUATION.
CAZ085-220515-
/O.NEW.KMFR.WS.A.0007.251223T1200Z-251226T1800Z/
MODOC COUNTY-
105 PM PST SUN DEC 21 2025
...WINTER STORM WATCH IN EFFECT FROM LATE MONDAY NIGHT THROUGH
FRIDAY MORNING ABOVE 5500 FT IN MODOC COUNTY...
* WHAT...HEAVY SNOW POSSIBLE ABOVE 5500 FT IN MODOC COUNTY. TOTAL
SNOW ACCUMULATIONS 3 TO 19 INCHES POSSIBLE. WINDS COULD GUST AS
HIGH AS 55 MPH OVER HIGH AND EXPOSED TERRAIN.
* WHERE...ABOVE 5500 FT IN MODOC COUNTY.
* WHEN...FROM LATE MONDAY NIGHT THROUGH FRIDAY MORNING.
* IMPACTS...TRAVEL MAY BE VERY DIFFICULT TO IMPOSSIBLE. THE
HAZARDOUS CONDITIONS COULD IMPACT THE TUESDAY MORNING AND EVENING
COMMUTES. STRONG WINDS COULD CAUSE TREE DAMAGE.
* ADDITIONAL DETAILS...VISIT WEATHER.GOV/MFR/WINTER FOR ADDITIONAL
SNOW PROBABILITIES
PRECAUTIONARY/PREPAREDNESS ACTIONS...
MONITOR THE LATEST FORECASTS FOR UPDATES ON THIS SITUATION.
SMITH
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