Strong Thunderstorms Possible on Wednesday; Snow Showers Possible Friday; Major Pattern Change Possible through Mid-March


Once the warm front moves through later today the Mid-Atlantic will be under the influence of southwesterly flow out ahead of the next strong cold front forecast to arrive during the afternoon hours on Wednesday. 

March will roar in like a lion, starting out with the potential for another round of strong storms and mild weather and ending the day with modified arctic air behind the cold front.

Watching a Clipper on Friday as some light snow may impact portions of the Mid-Atlantic

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Some Light Frozen Precipitation Possible Today in Western Zones

National Capital, DC,Netherlands Carillon

Pretty sunrise this morning over the National mall this morning!  Watching the radar closely off to our southwest as warm air advection out ahead of the next warm front could touch off some very light frozen precipitation across our far western zones. Clouds will increase today and temperatures may hold in the upper 40s.

Latest High Resolution Rapid Refresh model shows some light precipitation across our western zones developing late morning. With a dry atmosphere, evaporative cooling may allow for some very light snow, sleet or freezing drizzle across western Maryland and the Shenandoah Valley this morning into the early afternoon hours.

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Update on Saturday’s Squall Line

Want to cool off from the February heat wave? Head to the western shore of the Chesapeake Bay (Annapolis).

Image below (courtesy WxBell) shows today’s high temperatures (according to the latest high-resolution-rapid-refresh HRRR model):

  • Mid to upper 70s likely at Dulles while Annapolis holds near 60 when the Chesapeake Bay breeze kicks in! Pretty cool to visually see the local effects of the colder Chesapeake Bay waters and how convection currents work (rising warm air over land, with cooler air over water replacing it). 


Moving on to Saturday’s Storm potential:

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Timing Saturday’s Strong Thunderstorms

We are in a moderate drought and unfortunately the cold front that will roar through the Metropolitan Area on Saturday afternoon will provide very little in the way of drought relief. 


A squall line will likely cross the Blue Ridge around noon and then move across the immediate Washington Area & 95 corridor between 2 PM and 4 PM.  How much rain could fall in your back yard?

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