WEATHER: Temps To Remain Below Freezing Through Thanksgiving Morning


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The National Weather Service issued an updated “Special Weather Statement” late Tuesday afternoon (Nov. 23rd), with warnings that temps will remain below freezing through Thanksgiving morning (Nov. 25th).

They’re also predicting possible new record lows early Wednesday morning (Nov. 23rd) after a clear night with light winds.

There’s also a chance of snow on Thanksgiving morning, as a weak warm front will move in then.

“With temperatures remaining below freezing compact snow and ice will remain on many roadways,” the statement says. “For frequently travelled roads… friction from tires may temporarily melt the snow and ice on the Road… only to have it re-freeze again overnight.”

Here’s the statement as of 4:52 PM PST on November 23, 2010:

… Sub-freezing temperatures to last through Thanksgiving morning…

… Transition to a more typical weather pattern Thanksgiving afternoon…

The very cold air mass over western Washington will keep temperatures below freezing through Thanksgiving morning. The coldest temperatures… teens and possibly single digits… will occur Wednesday morning after a clear night with light winds. For some locations these readings may produce new record low temperatures. Day time highs Wednesday will warm into the 20s and lower 30s… and increasing clouds Wednesday night will keep most areas in the lower to mid 20s.

Icy roads will be a problem through Thanksgiving morning. With temperatures remaining below freezing compact snow and ice will remain on many roadways. For frequently travelled roads… friction from tires may temporarily melt the snow and ice on the Road… only to have it re-freeze again overnight.

A weak warm front will reach the area on Thanksgiving… beginning the transition to warmer weather. There is a good chance of precipitation on Thanksgiving… but there is still some uncertainty at this point how early any precipitation will reach the area. Any precipitation falling during the morning will most likely be snow… but accumulations will be very light. Temperatures will rise to above freezing by Thanksgiving afternoon… and rain is expected.

A cold front will bring rain and mountain snow to the area Thursday night. Snow levels will be around 3000 feet over the central Cascades… which is enough to bring snow to Snoqualmie Pass.

For areas that have several inches or more snow on the ground… the rain Thursday night will make Road conditions rather messy. Ponding of water on the roads as the snow melts may cause Hydro-planing problems for vehicles.

A showery weather pattern will persist the rest of the Thanksgiving Holiday weekend. Rain showers over The Lowlands with snow showers affecting the Cascade passes.

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