Monday, May 4, 2009

Mid Atlantic Drought Update: Deficits Continue Eroding

Images (click to enlarge): 24-hour total precipitation and 90-day percentage of average precipitation ending at 8 am EDT Monday, from National Weather Service Precipitation Analysis.

PM Update: As of 5 pm, additional rain during the day has further pushed down the deficits to as low as 10% for the year. Year-to-date totals and departures from average are now:
Washington National 10.69"/-18%
Washington Dulles 11.32"/-13%
Baltimore (BWI) 12.54"/-10%

Original Post:
Following extremely dry conditions for the first quarter of 2009, a wet April has led into a soggy May in the Mid Atlantic area. Through 8 am this morning, 24-hour precipitation over 1" was widespread in the northern Virginia/DC/Maryland region. Daily totals in the immediate vicinity of Washington, DC were:
Washington National 1.11"
Washington Dulles 1.32"
Baltimore (BWI) 1.11"
These amounts, and additional rainfall during the day, will continue to erode the lingering deficits. As of midnight, the year-to-date departures from average were:
Washington National -2.45"/-19%
Washington Dulles -2.54"/-20%
Baltimore (BWI) -2.04"/-17%

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