Sunday January 20 2019

Today is the big Flash Freeze Day. My wife asked what that really meant and I figured I should explain quickly. Temperatures will fall well below freezing so fast, that anything wet outside will freeze. This could be within the hour that temperatures cross the threshold of 32ºF. The includes some wet roads even hours after the rain stopped. We’ve had a lot of rain, and on the north side there is still some leftover snow and slush to keep the ground wet. Below is a look at the temperature timeline to help plan when this may happen near you.

Advisories:

Wind Advisory today for gusts to reach close to 50 mph.
Wind Chill Advisory for the air to ‘feel like’ below zero
The Winter Advisories continue this morning in central PA and western MD

Storm Set Up

The rain is moving away and the Low Pressure will push into New England. That is where the heavy snow remains. We will get the arctic blast behind starting this morning in our northern suburbs and cross Baltimore to the Eastern Shore this afternoon

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Temperatures

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Regional Snapshots at 7 AM —> slider

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Morning Timeline Forecast —> slider

The Flash Freeze is likely within an hour of dropping below 32ºF. Notice how fast temps drop even lower for your area

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Wind Gusts

At Noon

Sunday Evening

Afternoon Timeline Forecast —> slider

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Monday Morning

Looking Ahead:

We may do this again during the week. The next storm appears to be on the same track with a warm up and rain Wednesday, followed by an arctic blast and maybe some snow to add to the freezing Thursday.

Temperature Outlook