Low Temperatures in the Immediate Forecast

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US 26 at Quartz Creek Elevation 1100 ft. From ODOT camera.

MUCH COOLER TEMPERATURES AND MOUNTAIN SNOW SHOWERS THIS WEEK…

A COLD UNSTABLE AIR MASS REMAINS IN PLACE OVER THE REGION THROUGH

THE REMAINDER OF THIS WEEK. AN ASSOCIATED UPPER LEVEL TROUGH WILL

GRADUALLY DRIFT SOUTH FROM THE GULF OF ALASKA…SETTING UP JUST

OFF OF THE PACIFIC NORTHWEST COASTLINE LATE TONIGHT INTO THURSDAY

MORNING. EXPECT SNOW LEVELS BY THURSDAY EVENING TO REACH 2500 TO

3500 FEET…BRINGING THE POTENTIAL FOR A COUPLE INCHES OF SNOW

ACROSS THE CASCADES AND THE HIGHER TERRAIN OF THE COAST RANGE.

HOWEVER…THE MORE WESTERLY TRACK OF THE UPPER LOW WILL LIKELY

KEEP THE HEAVIEST PRECIPITATION JUST OFFSHORE WITH RELATIVELY

MINIMAL AMOUNTS EXPECTED TOWARD THE CASCADES. SNOW LEVELS FRIDAY

WILL THEN FALL TO AROUND 1500 FEET NEAR THE CASCADES WHILE

US 30 at Bradley Wayside, elevation 655 ft. Camera view from ODOT.

REMAINING AROUND 2500 FEET TOWARD THE COAST RANGE…BUT THE SNOW

POTENTIAL DRAMATICALLY DECREASES AS THE BULK IS EXPECTED TO MOVE

SOUTH AND WEST OF THE REGION.

ADDITIONALLY…TEMPERATURES AT ALL ELEVATIONS WILL LOWER

DRAMATICALLY OVER THE NEXT FEW DAYS. OVERNIGHT TEMPERATURES IN THE

VALLEY AND AT THE COAST WILL FALL TO THE MID AND UPPER 30S AROUND

SUNRISE THURSDAY…WHILE THE CASCADES WILL DIP INTO THE 20S.

THERE IS STILL A FAIR AMOUNT OF UNCERTAINTY REGARDING PRECIPITATION

DETAILS AND ESPECIALLY SHOULD THE UPPER LOW FORECAST DRIFT BACK

TOWARD THE EAST WITH TIME. PLEASE MONITOR NATIONAL WEATHER SERVICE

FORECASTS AND STATEMENTS THROUGH THE REMAINING DAYS AHEAD…

PARTICULARLY IF YOU HAVE PLANS TO TRAVEL IN AND/OR OVER THE

CASCADES.