Tuesday April 21 2020

A quiet start this morning is not going to last. A strong cold front will provide some strong lines of storms that may turn severe mid day and early this afternoon. The main risk will be damaging winds over 60 mph. But large hail is possible as well with very cold air aloft and a new Canadian air mass to follow.  Temps will drop into the 20s inland Wednesday morning, where a hard freeze is expected. Following that, we have two more storms brining rain Thursday through Sunday.

The prime energy will be passing across northeastern Maryland to southern New England. But all of our region should watch for the potential of storm impact.  The storm timeline is highlighted in the slider below.

Severe Storm Risk Today


Radar Simulation –> slider

  • Some renegade showers could pass across northern areas this morning.
  • 12 Noon and 1 PM the main storm line crosses the big cities. A second line is possible.
  • 2 PM to 5 PM – The focus crosses Delmarva and Southern Maryland.
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Temperature Forecast

Afternoon: Upper 50s to mid 60s.


Today’s Weather Collection Lab:

Click the map for

  • Monday’s Observations
  • This Morning’s Map
  • Today’s climate data, sun times, and moon phase

Wednesday Morning

The I-95 corridor and waters around the Bay should protect those places in the mid 30s. A sharp cutoff to the 20s is expected inland.

Freeze Warning

Colder air spills in overnight bringing temperatures down into the 20s Wednesday morning across the counties west and north of the big cities. It is still too early to plant tender vegetation. The temperature forecast map can be found below.


Wednesday Afternoon

This will be the sunny and quiet day of the week.


Looking Ahead:

The next round of rain will be with one storm Thursday into Friday, then a second event over the weekend.

Storm Animation: Tuesday Afternoon to Sunday Evening


Temperature Outlook 


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Water Spout OR Scud Cloud on videos and photos near Middle River Maryland

Other  Links:

When is the typical last freeze or frost?

See more here


Baltimore Weather At BWI May Not Be As Hot As Reported

Construction at the airport close to the weather station may be added artificial heat. Click here or the image for the details.



Was Your County Not Included?

Click this map for more on the regional forecast zones


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