SPECIAL WEATHER STATEMENT
Issue Date: 215 PM PST SUN DEC 20 2009
Expiration: 600 AM PST MON DEC 21 2009
...LOW SNOW LEVELS COMING MONDAY AFTERNOON AND MONDAY NIGHT TO
SOUTHWEST WASHINGTON AND NORTHWEST OREGON...
SNOW LEVELS ARE EXPECTED TO PLUMMET MONDAY AFTERNOON AND MONDAY
NIGHT BEHIND A COLD FRONT THAT WILL BE BRINGING COLD AIR FROM
ALONG THE BRITISH COLUMBIA COAST DOWN TO SOUTHWEST WASHINGTON AND
NORTHWEST OREGON. THE SNOW LEVEL WILL DROP TO AROUND 1500 FEET
LATE MONDAY...AND COULD BE AS LOW AS AROUND 1000 FEET MONDAY NIGHT
AND EARLY TUESDAY. ONSHORE FLOW IS EXPECTED TO KEEP THE SNOW LEVEL
ABOVE THE VALLEY FLOOR AND ABOVE AREAS NEAR SEA LEVEL.
HOWEVER...ACCUMULATING SNOW IS LIKELY TO FALL IN THE COASTAL
MOUNTAINS AND THE CASCADE FOOTHILLS...THE UPPER HOOD RIVER
VALLEY...AND THE HIGHER ELEVATIONS AROUND THE WESTERN COLUMBIA
RIVER GORGE LATER MONDAY AND ESPECIALLY MONDAY NIGHT AND TUESDAY.
SNOW ACCUMULATIONS OF 3 TO 6 INCHES ARE POSSIBLE IN THE COASTAL
MOUNTAINS AND FOOTHILLS...AND 1 TO 4 INCHES IN THE HIGHER
ELEVATIONS AROUND THE WESTERN COLUMBIA RIVER GORGE AND IN THE
UPPER HOOD RIVER VALLEY.
THE CASCADES WILL LIKELY GET A GOOD DOSE OF SNOW AS WELL...WITH A
FOOT OR MORE POSSIBLE...SPREAD OUT THROUGH TUESDAY. THE PERIOD
WITH THE HEAVIEST SNOW IN THE CASCADES WILL BE MONDAY THROUGH
TUESDAY MORNING. SNOW LEVELS IN THE CASCADES WILL AFFECT MAINLY
THE SKI RESORTS TONIGHT AND EARLY MONDAY...THEN FALL TO PASS
ELEVATIONS BY NOON ON MONDAY...THEN WELL BELOW THE PASSES MONDAY
AFTERNOON.
BE SURE TO LISTEN TO THE LATEST FORECASTS BEFORE TRAVELLING
THROUGH THE SOUTHWEST WASHINGTON AND NORTHWEST OREGON MOUNTAINS
EARLY THIS WEEK AS SNOW WILL LIKELY MAKE TRAVEL DIFFICULT AT TIMES.
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