SPECIAL WEATHER STATEMENT
Issue Date: 539 AM PST THU DEC 10 2009
Expiration: 545 PM PST THU DEC 10 2009
...WINTER PRECIPITATION EVENT ACROSS OREGON AND FAR SOUTHERN
WASHINGTON THIS WEEKEND...
A COMPLEX STORM SYSTEM WILL APPROACH THE AREA FRIDAY NIGHT AND
MOVE ACROSS OREGON AND FAR SOUTHERN WASHINGTON SATURDAY AND
SATURDAY NIGHT. THE ARCTIC AIR MASS OVER THE REGION IS MODERATING
VERY SLOWLY...SO MOST OF THE PRECIPITATION FROM THIS STORM WILL FALL
IN THE FORM OF SNOW. THERE IS SOME UNCERTAINTY ON HOW FAR NORTH
THE MOISTURE FROM THIS SYSTEM WILL SPREAD...BUT THERE IS THE
POTENTIAL FOR ACCUMULATING SNOW IN THE LOWER ELEVATIONS OF NORTH
CENTRAL AND NORTHEAST OREGON AS WELL AS THE MOUNTAINS DEPENDING ON
THE STORM TRACK. SOME WARMER AIR ALOFT WILL SPREAD OVER PARTS OF
THE COLUMBIA DESCHUTES PLATEAU AND THE JOHN DAY BASIN WHICH COULD LEAD
TO SOME FREEZING RAIN AND SLEET MIXED IN WITH THE SNOW.
THIS IS AN EVOLVING SITUATION AND PEOPLE ACROSS INTERIOR PORTIONS
OF OREGON AND EXTREME SOUTHERN WASHINGTON SHOULD CONTINUE TO
MONITOR THE FORECASTS OVER THE NEXT COUPLE OF DAYS.
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