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May 4, 2011

Showers and cold air slow to depart

Overnight rain dropped more than a half-inch on The Sun's weather station at Calvert and Centre streets, with the highest rain rates around 6 a.m.  The rest has been dribs and drabs, but it adds up.  

Sun Weather Station

Other spots have seen more, especially south of Baltimore. Anne Arundel County had some serious storms, with at least five schools closed this morning due to power outages. Here's more from the CoCoRaHS Network:

South Gate, Anne Arundel:  1.18 inches

White Marsh, Baltimore Co.:  0.78 inch

Severna Park, Anne Arundel:  0.75 inch

Herald Harbor, Anne Arundel:  0.70 inch

Cockeysville, Baltimore Co.: 0.65 inch

BWI-Marshall Airport:  0.62 inch

Bel Air, Harford:  0.55 inch

Taneytown, Carroll:  0.42 inch

The clouds, cold air and drizzle will be slow to depart the region, forecasters say. Today's showers should dissipate by 2 p.m. or so, although there will be some lingering risk until sunset. Temperatures will struggle to reach 60 degrees. We haven't quite reached 50 here at The Sun, at noon. The average high for this time of year at BWI is 70 degrees.

The cold front that crossed the region overnight has moved off the coast, but the trailing rain is taking its time. As skies finally begin to clear late tonight, radiation cooling will drop the overnight lows deep into the 40s. Western counties could see the 30s, and the weather service has issued frost and freeze watches for portions of western Virginia and West Virginia. "This could potentially damage spring crops sensitive to a freeze," forecasters warned.

Northwest winds Thursday will bring drier conditions, and sunshine will push daytime highs into the upper 60s - still cool for the season.  Low pressure  off the coast of Maine (see map; click to enlarge), and high pressure in the Ohio Valley will combine to make Thursday a windy one. Showers and thunderstorms become a factor again Friday and Friday night as new disturbances move by. 

For the weekend, Saturday is your best bet for outdoor activities, with  mostly sunny skies predicted, and a high near 70. Showers return on Sunday.

Posted by Frank Roylance at 11:29 AM | | Comments (0)
Categories: Forecasts

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About Frank Roylance
This site is the Maryland Weather archive. The current Maryland Weather blog can be found here.
Frank Roylance is a reporter for The Baltimore Sun. He came to Baltimore from New Bedford, Mass. in 1980 to join the old Evening Sun. He moved to the morning Sun when the papers merged in 1992, and has spent most of his time since covering science, including astronomy and the weather. One of The Baltimore Sun's first online Web logs, the Weather Blog debuted in October 2004. In June 2006 Frank also began writing comments on local weather and stargazing for The Baltimore Sun's print Weather Page. Frank also answers readers’ weather queries for the newspaper and the blog. Frank Roylance retired in October 2011. Maryland Weather is now being updated by members of The Baltimore Sun staff

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