March Out Like a Lion

The upcoming Easter weekend is looking stunning with mostly sunny skies and high temperatures ranging from the middle 60s to near 70 degrees.  But first we have to get through a rather rainy Wednesday and January-like temperatures on Thursday and Friday.

The latest high-resolution NAM model (image above, courtesy Pivotal Weather) shows widespread showers with some embedded thunder beginning around 1pm on Wednesday and continuing through the tail end of the evening rush hour.

An arctic front will then approach the DC Area on Wednesday night while a strong area of low pressure develops and rides northward along the front changing rain over to snow in our western zones. Some snow may even mix…

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No April Fools Joke, Here Comes the Temperature Plunge!

Just as the famous Yoshino cherry trees begin to blossom along the Tidal Basin, the North Atlantic Oscillation (NAO) is forecast to dive providing an ominous and reliable warning that a blocking pattern across the northern Atlantic Ocean is setting up as we head into early April.

The image above (courtesy NOAA) shows the NAO index plunging this week.  When the NAO is negative, high pressure builds over the north Atlantic Ocean causing the jet stream to dip into the eastern United States.  This dip in the jet stream typically initiates east coast storms followed by a blast of cold air.

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Squall Line this Evening Ahead of ‘Arctic Blast’

The image above (courtesy Tropical Tidbits) is from the latest North American High-Resolution forecast model. Notice the yellow line of heavy rain moving through the DC Region between 00z (8pm) and 02z (10pm) this evening. This represents the actual cold front which will be accompanied by brief torrential rain and winds gusting in excess of 45 to 50mph.

High temperatures on Saturday will range from the low to middle 40s in our western zones to the upper 40s in downtown Washington… more typical of mid January than early May.

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