Monday 5:30 AM Update

Good morning, here is your 5:30 AM update:

High impact Nor’easter still slated to slam the Washington Metropolitan Area this evening through Tuesday.  Thunder-Snow and sleet is possible overnight with gusty winds (40 mph +) and snowfall/sleet rates of one to two inches per hour during the overnight hours!

The exact snow/snow-sleet/sleet-rain line is still in question but it is important to remember that where this line sets up, one won’t have to travel too far to go from lighter accumulations to significant accumulations. This is why it is prudent to be prepared for this major high-impact winter storm (the potential loss of power) than to focus too much on any slight shifts back and forth between where this line sets up. Please continue to monitor the official forecast from the National Weather Service as those of you under Winter Weather Advisories could still be upgraded to a Winter Storm Warning later today.

As of 5AM No changes to my snowfall map:

  • After looking at the all-important European Model I am sticking with this for now. Any update to this map won’t be made until this afternoon.

 

  • The area of highest uncertainty in my opinion continues to be those of you located in the “4 to 8” and “1 to 4” zone in the map below.  I can see a situation where this zone gets shrunk very close together meaning the short west to east distance from Woodbridge, VA to Waldorf, MD could see a snowfall gradient of 10″ or more! 

This storm has a lot of moisture to work with:

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