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Posted at 09:30 AM ET, 08/27/2012

Buckets of rain douse Chesapeake Bay and Delmarva; a waterspout in Charles county

Waterspout near Cobb Island in Charles County, Md. early Sunday afternoon, posted to YouTube

Even as low pressure weakened over the mid-Atlantic Sunday, there was sufficient turning of the wind with height to spin up an impressive waterspout in southern Maryland. (See video above).

But some of the rainfall amounts logged along and east of I-95 this weekend were more remarkable than this whirlwind.

Consider Baltimore Washington International (BWI) Airport set a rainfall record for the date Sunday tallying 3.36”,almost doubling the old record from 1974 of 1.73”.


Weekend rainfall estimates from doppler radar. Regions in yellow received at least 2” of rain over the weekend. Red shaded areas received at least 5” and the lightest pink shade indicates 10”. (Radarscope)
But the heaviest amounts fell to the south and east, in southern Maryland and on the Delmarva Peninsula.

On Saturday and Saturday night, 5-10” of rain in the vicinity of Bethany Beach and Rehoboth. Bethany received 6.39” and Rehoboth 7.21” - totals more characteristic of a tropical storm.

Having been in Bethany at the time, I can attest the rain fell in sheets with loud, booming thunder and frequent lightning beginning late Saturday afternoon and not relenting until the pre-dawn hours Sunday. Low-lying areas were flooded.

10” or more rain may have fallen around Berlin, Maryland according to doppler radar estimates.

During Sunday, the axis of the heaviest rain shifted west. Doppler radar estimates indicate more than 5”fell around Easton, Calvert Beach and northwest of Baltimore between Reisterstown and Timonium.

South of Baltimore, there was an abrupt cutoff in rainfall totals west of I-95. Reagan National received just 0.29” of rain Sunday and Dulles 0.32”.

While localized flooding resulted from the weekend’s torrents, they concentrated over the part of the region suffering most from drought.

How much rain fell where you live over the weekend?

By  |  09:30 AM ET, 08/27/2012

Categories:  Latest, Local Climate, Thunderstorms, Floods

 
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