Tuesday May 12 2020

Another Frost Advisory has been issued for inland areas for Wednesday morning. This should be the final one of the season, so run that same drill of protecting your outdoor plants and bring your potted ones indoors.

I know this is getting old! If I am over the chill, then it must be saying something. I was optimistic that we already past the core of the cold air, as some clouds kept this morning’s temperatures milder than forecast.  But High Pressure and light winds should allow the daytime clouds to fade, bringing on a clear night and rapid cooling.

May 12 maryland weather Tuesdsy afternoon


Frost Advisory Wednesday

This is for places where temperatures will drop into the 30s before sunrise.  Often the colder spots are west and north of the cities and warmer waters of the Chesapeake Bay.

May 12 Frost Advisory Wednesday


How Cold Will It Get?

Here is a comparison of three computer models. The agreement is that locally we should not see freezing. The only marginal contrast is where the frost line may be based on dropping into the 30s.  Note that frost can form on grass and plants when the air temperature (measured at 5 Ft above the ground) is 39ºF or cooler.

Forecast Low Temperatures 

May 12 maryland weather temperstures Wednesday morning ECMWF


May 12 maryland weather temperstures Wednesday morning HRRR


May 12 maryland weather temperstures Wednesday morning NAM


Weather Collection Lab:

Yesterday’s Observations; Today’s Climate Data, Sun Times, and Moon Phase.

May 12 maryland weather Tuesday morning


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Wednesday Warming

May 12 maryland weather temperatures Wednesday afternoon


Warmer By This Weekend

May 12 maryland weather temperature outlook


Also See:


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

Other  Links:

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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