'It will be cold enough for snow at valley floors by Tuesday morning'

'It will be cold enough for snow at valley floors by Tuesday morning'

ROSEBURG, Ore. - The moisture soaking the Northwest will be on its way out just as a blast of Arctic air moves the freezing level down to the valley floor, the National Weather Service said Monday.

The mountains won't escape this wintry weather: Conditions are right for another 4 to 8 inches of snow at the pass levels in the Cascades and up to a foot above 5,500 feet.

The National Weather service issued a Special Weather Statement regarding this week's expected cold snap. Could temps reach the mid-teens before it's over? They say yes.

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For skiers, that's good news: Mount Bachelor and ski areas on Mount Hood are already open, and the base elevation at Willamette Pass Ski Resort is 5,120. | Ski and Snow Report

However, school children in Roseburg and Douglas County hoping for a snow day Tuesday might be disappointed. | School Closures & Delays

"Big question remains as to what happens tonight," forecasters wrote in the short term weather forecast discussion. "Showers will be decreasing. However, air mass will be cooling rapidly tonight. It will be cold enough for snow at valley floors by Tuesday morning but probably not in time to see anything more than some flurries or mixed rain and snow showers in the Umpqua Valley as the precipitation comes to an end."

That doesn't mean the weather couldn't create hazardous conditions in town.

"Roads will gradually dry, but any residual moisture may well freeze later tonight, especially on lesser traveled roadways and areas where plenty of leaves are still on streets," forecasters said. "Motorists should be prepared for locally icy spots on roads in valleys later tonight and Tuesday morning."    

In the mountains, forecasters have issued a winter weather advisory for snow and blowing snow, in effect until 7 p.m.

Snow levels will drop below 3,000 feet this afternoon and 2,000 feet by evening.

"Roads will become snow covered and hazardous," forecasters said. "Periods of snow will cause primarily travel difficulties. be prepared for snow covered roads and limited visibilities, and use caution while driving."

NOAA Special Weather Statement:

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MEDFORD OR
319 PM PST SUN DEC 1 2013

CENTRAL DOUGLAS COUNTY-EASTERN CURRY COUNTY AND JOSEPHINE COUNTY-
EASTERN DOUGLAS COUNTY FOOTHILLS-JACKSON COUNTY-
INCLUDING THE CITIES OF...DRAIN...ELKTON...ROSEBURG...SUTHERLIN...
GREEN...MYRTLE CREEK...CANYONVILLE...GLENDALE...GRANTS PASS...
CAVE JUNCTION...STEAMBOAT...TOKETEE FALLS...MEDFORD...ASHLAND
319 PM PST SUN DEC 1 2013

...VERY COLD WEATHER THIS WEEK WITH LIGHT SNOW POSSIBLE IN THE
VALLEYS...

A STRONG COLD FRONT WILL MOVE THROUGH THE REGION ON MONDAY.
PRECIPITATION IS EXPECTED TO BE RAIN IN THE VALLEYS THROUGH MONDAY
AFTERNOON, HOWEVER BY MONDAY NIGHT AND TUESDAY IT WILL BE COLD
ENOUGH THAT SNOW MAY FALL ALL THE WAY TO THE VALLEY FLOORS.

THE AIRMASS WILL THEN DRY OUT AND BECOME VERY COLD TUESDAY NIGHT
THROUGH THE REST OF THE WEEK. LOW TEMPERATURES WILL BE WELL DOWN
INTO THE 20S OVER SOUTHWEST OREGON VALLEYS WITH HIGHS IN THE LOW
TO MID 30S. THURSDAY MORNING IS EXPECTED TO THE BE THE COLDEST
TIME WHEN LOWS IN THE MID TO UPPER TEENS ARE POSSIBLE.

IT IS CERTAIN THAT VERY COLD WEATHER IS COMING TO SOUTHWEST
OREGON THIS WEEK. CONFIDENCE IN SNOWFALL IS LOWER, BUT RESIDENTS
AND TRAVELERS SHOULD ALSO BE PREPARED FOR THE POSSIBILITY OF
LIGHT SNOW EARLY TUESDAY WHICH COULD IMPACT TRAVEL.

STAY TUNED TO THE NATIONAL WEATHER SERVICE FOR UPDATED FORECASTS
AS THIS STORM SYSTEM APPROACHES.