Flash Flood Watch Issued For MD, Heavy Rains Forecast

MARYLAND — A second day of rain has prompted the National Weather Service to issue a flash flood watch for parts of Maryland, D.C. and Northern Virginia Tuesday. Hourly rainfall rates of 1.5 to 2 inches are possible in the heaviest downpours.

"Flash flooding will be possible Tuesday afternoon into the early evening, particularly for areas which were hit on Monday by very heavy rainfall," the NWS said in issuing the watch.

In Maryland, Anne Arundel, Howard, Montgomery, Howard, Montgomery, Prince George's and Baltimore counties are under the watch from 2 to 8 p.m.

And a severe thunderstorm watch is in effect until 9 p.m. for Anne Arundel, Baltimore, Calvert, Caroline, Cecil, Charles, Dorchester, Harford, Howard, Kent, Montgomery, Prince George's, Queen Anne's, Somerset, St. Marys, Talbot, Wicomico, and Worcester counties, plus the city of Baltimore.

Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations, the NWS said. Flooding may occur in poor drainage and urban areas.

Related: DC Flash Flood Drowns Dogs At Pet Care Business

"Given the antecedent conditions in place across portions of the D.C. metro area, additional heavy rainfall today will enhance the threat for further flash flooding issues," the National Weather Service said. "Thunderstorms may be slow to move initially before becoming more progressive later in the afternoon."

Residents are urged to check weather.gov/safety/flood for flood safety and preparedness information.

Most of the I-95 corridor has been upgraded to a slight risk for severe weather for thunderstorms that are expected to move through this afternoon into this evening, the NWS said.

Here's the latest Maryland forecast from the National Weather Service:

Tuesday: Scattered showers, with thunderstorms also possible after 3pm. Some of the storms could produce gusty winds and heavy rain. Partly sunny, with a high near 89. Southwest wind around 9 mph. Chance of precipitation is 50%.

Tuesday Night: Showers and thunderstorms likely before midnight, then a chance of showers between midnight and 3am. Some of the storms could produce gusty winds and heavy rain. Mostly cloudy, with a low around 72. Northwest wind 5 to 7 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Wednesday: Sunny, with a high near 89. Northwest wind 6 to 9 mph.

Wednesday Night: Partly cloudy, with a low around 73. West wind 5 to 7 mph becoming calm after midnight.

Thursday: Mostly sunny, with a high near 90. Light east wind becoming south 8 to 13 mph in the morning.

Thursday Night: A slight chance of showers after 9pm. Mostly clear, with a low around 76. Chance of precipitation is 20%.

Friday: Sunny, with a high near 89.

Friday Night: Mostly clear, with a low around 66.

Saturday: Sunny, with a high near 86.