From the ABC 7 Weather team

Arctic airmass settles Into D.C.

November 11, 2013 - 05:56 AM
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Get ready for the coldest air of the season to move in tomorrow. 

Hope you have your heaviest winter coats, gloves, scarves, and hats ready: beginning tomorrow, you'll likely need it.  A big dip in the jet stream will allow an arctic air mass to settle in.  Check out Monday morning temperatures in central Canada.

That cold air mass will slide south overnight Monday and will greet us Tuesday. Temperatures will moderate a bit, so we are not expecting sub-freezing temperatures; however, highs will only be in the upper 30s to lower 40s and overnight lows will tumble into the 20s. 

Factor in brisk northerly winds, and it will feel even colder! 

Along with the cold air also comes the chance for a little precipitation as the cold front slides through.  This WILL NOT be a big snow-maker in the nation's capital, but a few wet flakes are not out of the question. 

Overnight Monday and early Tuesday, the front may squeeze out a little precipitation that could fall as cold rain or even wet snow.  Precipitation totals will be minimal to even non-existent, so no accumulation is expected.  Also keep in mind how warm ground temperatures are.

Penn State ewall

This further emphasizes the point the StormWatch weather team made last week regarding the chatter about a big snowstorm.  Early last week, computer guidance suggested a coastal low would develop to produce high snow accumulations in our area. 

It's important to recognize how the long range forecasts can change over a span of a few days.

Until then, bundle up and brace yourself for this cold blast!  In fact, Reagan National will likely see it's first day this season of at or below freezing temperatures. 

Check out the forecast lows for Wednesday morning. I'm cold just looking at these numbers!  It will feel even colder than this with brisk northerly winds. 

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