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May 13, 2008

So how much rain did we get?

NOAA 

Whew! That was a lot of water. But just how much, exactly? The numbers, of course, depend on where you were. The National Weather Service map above shows the heaviest concentration of rain south of Annapolis, chiefly in Calvert County. Here are more rain totals from around the region.

The National Weather Service instruments at Baltimore-Washington International Airport recorded 2.2 inches yesterday, a record for the date. The previous record for rain on a May 12 in Bawlmer was 2.06 inches, set in 1921. It was the third record rain total at BWI since Friday.

Altogether, the airport recorded a five-day total of 6.15 inches. That is 2.28 inches more than the long-(30-year) term average for an entire May in Baltimore. We are also running 4.73 inches ahead of the pace for the first 12 days in May.

The heaviest rain, of course, fell to the south of Baltimore. In fact, our instruments here at Calvert & Centre streets clocked in just 1.61 inches during the Sunday/Monday storm, while the airport saw 3.69  inches. Some locations saw far more, including North Beach, in Calvert County, which topped the state at more than 7 inches.

There's more rain in store. These sunny skies and 70-degree temperatures will hang around for today and tomorrow. But by Thursday you can expect increasing chances for showers as the next storm system and cold front move in from the west, much as they did last week. The next sunshine will be Monday.

Posted by Frank Roylance at 12:19 PM | | Comments (4)
Categories: By the numbers
        

Comments

Am I the only one who doesn't see a difference in shades of yellow for the "less than 1" and "greater than 6" inches categories?

Nope. I don't see a difference either. I suspect they just ran out of colors. But it's reasonable to assume that if it's yellow surrounded by white, it's probably greater than 6 inches. If it's yellow surrounded by green, it's probably less than 1 inch.

Bryan's question was noticed by the folks at Sterling. They have now substituted red for the 6-inches-plus regions. Here's the new link: http://www.erh.noaa.gov/er/lwx/events/20080512/ We aim to serve.

Well, I am I the only one that thinks it is pretty amazing that the entire Eastern Shore got 5-6 inches of rain, or did we finally secede!

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About Frank Roylance
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.

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