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Posted at 09:29 AM ET, 04/23/2012

Sunday’s rain: a soaker, but not quite record-setting

Doppler estimated rainfall amounts indicate a fairly uniform 1-1.5” fell across the metro region. (NOAA)
Sunday’s coastal storm provided a welcome day-long washout, cutting the region’s annual rainfall deficit by 20 percent. Amounts were fairly uniform with most spots receiving between 1-1.5”. At Reagan National Airport (DCA), 1.27” fell, just shy of the daily record of 1.47” from 1883.

Prior to the weekend’s rain, the annual deficit rainfall deficit at DCA had passed 5” and drought conditions had creeped into the eastern suburbs. The year-to-date rain of 5.75” was just 0.2” above the lowest output on record since 1871. After Sunday, the rainfall deficit stands at an improved but still lacking 3.97”. In other words, we need water to keep coming and, fortunately, it’s in the forecast.

Dulles Airport received 0.96” and BWI 1.33”.

See below for more Sunday rainfall totals...

Surface weather map from around 9:30 p.m. EDT Sunday night shows a wound-up coastal low pressure center just east of the Delmarva peninsula (National Weather Service)
Very light, patchy rain began Sunday morning around the region. As the coastal low deepened off the North Carolina and moved north, rain increased in coverage and intensity around midday. Between 1 p.m. and 10 p.m., the rain fell moderately and remarkably steadily. Hourly amounts at Reagan National Airport varied between 0.09-0.13” per hour in that span.

Steady rain ended between 11 p.m. and midnight as the low pulled north of our latitude.

Here are select rainfall totals from around the region...


West Springfield 1.32”
McLean 1.08-1.27”
Vienna 1.05”
Fairfax 0.85”
Warrenton 0.69-0.71”
Woodbridge 1.15-1.26”
Stafford 1.11”
Leesburg 1.20”
Lovettsville 1.36”
Round Hill 1.38”


Pasadena 1.4”
Severn 1.24-1.38”
Waldorf 1.5”
La Plata 1.1”
Frederick: 1.05”
Columbia 1.29-1.32”
Ellicott City 1.19”
Silver Spring 1.33”
Rockville 1.29”
Gaithersburg 1.01-1.19”
Bethesda 1.26”
Laurel 1.42”
Oxon Hill 1.44”
Bowie 1.39”
Hollywood 1.84”
Leonardtown 1.5”

More reports from the National Weather Service

By  |  09:29 AM ET, 04/23/2012

Categories:  Latest, Droughts, Local Climate

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