Arctic airmass settles Into D.C.

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.{ }