Big Changes Possible Late Week as Powerful Nor’easter May Threaten Mid-Atlantic Coast

Last week I warned that the upper-level pattern was showing signs of becoming blocked and a pattern change to below- average temperatures is likely the second half of April across much of the eastern United States.

Potent Nor’easter May Impact Mid-Atlantic and New England Friday and Saturday

A very potent upper-level low pressure system depicted in the forecast model above (courtesy pivotal weather) will slide across the northern Mid-Atlantic states on Thursday, likely spawning the development of a coastal storm (Nor’easter) on Friday.

Depending upon the exact track of this system wet snow may accumulate in spots from the Alleghenies to the Poconos with a cold rain, gusty winds, and temperatures running twenty degrees below average (or more) for the lower elevations.

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Freezing Rain Redeveloping this Evening along Interstate 95

Here are the Latest Snowfall Reports (a bust with mainly sleet in Metro DC) from the NWS Database

As has been the trend this winter, the far northwest suburbs received a bit more snow but sleet even ruined the party for these areas as well with 7.2″ so far being the unofficial winner near Martinsburg, WV.

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Travel Nearly Impossible Thursday as High-Impact Winter Storm Blasts DC Area

Latest Snow and Sleet Accumulation Potential Map

This will be a high-impact winter storm with a crippling sleet and/or freezing rain event along and east of Interstate 95.  For those of you in the 6 to 10″ area of my map below — this is mainly a snow event .  Elsewhere, precipitation will begin as a period of accumulating snow before changing to sleet  and/or freezing rain.

The million dollar question remains whether we see mostly sleet (ice pellets) or freezing rain (liquid that falls and freezes on everything).

Ice Accumulations from Freezing Rain could be Crippling along Interstate 95

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