Heavy rain occurred as tropical moisture (record levels for November) streamed northward into the area and interacted with a stalled frontal zone. This heavy rainfall resulted in widespread flooding across central and southern Maryland.
Every event with a place to put it. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS LWX wrote it up.
Heavy rain occurred as tropical moisture (record levels for November) streamed northward into the area and interacted with a stalled frontal zone. This heavy rainfall resulted in widespread flooding across central and southern Maryland.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Baltimore/Washington wrote its last area forecast discussion before the first event at Nov 11, 3:09 PM EST, 5 hours 30 minutes earlier.
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</html>The national radar mosaic for the moment the first event began.
19 flood. Local standard time, as filed.
Delaware Avenue (MD-7) was closed due to flooding between Howard Street and Creswell Avenue.
St Marys River at Great Mills reached Major Flood Stage, and was above Minor Flood Stage during the indicated time period. The peak level of 11.46 feet was reached at 2:30 AM on November 12th. Widespread flooding occurred in Great Mills, with water approaching homes and businesses.
Newtowne Neck Road was closed due to flooding at Merchants Lane.
Medleys Neck Road was closed due to flooding. Vehicle was stranded in floodwater.
Point Lookout Road (MD Route 5) was closed due to flooding at Chingville Road.
Three Notch Road (MD-235) was closed at Lei Drive due to flooding.
Prince Frederick Road (MD-243) was closed due to flooding at Leonardtown Road (MD-5).
Bayside Road (MD-243) was closed at Newtown Neck Road due to flooding.
Medleys Neck Road (MD-244) was closed due to flooding.
Flat Iron Road was closed due to flooding at Highway to Heaven Lane.
Maddox Road (MD-238) was closed at Hurry Road due to flooding.
MD Route 202 was closed due to flooding at Baltimore-Washington Parkway.
Point Lookout Road (MD-5) was closed due to flooding at Indian Bridge Road (MD-471).
Old Washington Road (MD-925) was closed due to flooding between Leonardtown (MD-5) and Smallwood Drive.
Middletown Road was closed due flooding between Billingsley Road and Marshall Corner Road (MD-227).
Bumpy Oak Road was closed due to flooding between Livingston Road and Marshall Corner Road (MD-227).
Central Avenue (MD-214) was closed due to flooding east of Beards Point Road/Brick Church Road.
Mattawoman Creek at Pomonkey was in Minor Flood Stage during the indicated time period, reaching a peak level of 7.76 feet at 10:00 PM on November 12th. Pomfret Road was flooded.
The Western Branch at Upper Marlboro was in Minor Flood Stage during the indicated time period, reaching a peak level of 13.90 feet at 5:15 PM on November 12th. The Water Street Bridge was completely covered by water, and much of Race Track Road was flooded between Marlboro Pike and the Community Center.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Maryland in 2020Every state in 2020This day in weather historyWarnings in Maryland, November 2020
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-10-01. Each event’s entry at NCEI: 928433, 927353, 926407, 926408, 926411, 926413, 926414, 926416, 926417, 926418, 926420, 926421, 926424, 926888, 926890, 926893, 926895, 927351, 927350.