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Maryland weather: Rain, wind and cooler temperatures expected Sunday

An alarm sounded as a potential flood warning in Ellicott City as heavy rain fell in the area.

Rain is expected to continue through the weekend in the Baltimore area, potentially causing more flooding Sunday, according to the National Weather Service.

No accumulation was recorded Saturday at BWI Marshall Airport, according to the National Weather Service, but showers are expected to pick up into Sunday morning with new precipitation amounts between a quarter and half of an inch possible.

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A coastal flood advisory is in effect for the Anne Arundel County shoreline from 1 a.m. Sunday to 7 a.m. Sunday. At 2.8 feet, flooding of some of the parking area near Dock Street in Annapolis may occur, with water surrounding the Alex Haley Memorial. Tides will be 1 to 1½ feet above normal.

Showers, are expected during the day Sunday, mainly before 2 p.m., with a high near 73, which is unseasonably low for mid-August. Northeast winds of 9 to 11 mph could have gusts as high as 23 mph. New precipitation amounts between a half and three-quarters of an inch are possible.

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Because of the winds, a small craft advisory is in effect for tidal Potomac from Key Bridge to Indian Head from 6 a.m. to 3 p.m. Sunday. A beach advisory was issued to warn of a high risk of rip currents from 8 a.m. to 8 p.m. Sunday with breaking waves around 5 feet resulting in rough surf conditions.

On Sunday night, there’s a chance of showers, mainly before 8 p.m., with patchy fog after midnight. The chance of precipitation is 30%.

Skies should clear a bit Monday, the service said, with showers and thunderstorms possible after 2 p.m. and a high near 83.

Tuesday is the first day in more than a week with no rain in the forecast. Conditions should be mostly sunny with a high near 86.

Friday’s rain prompted a flood warning for the southeastern portions of Baltimore City and Baltimore County. The service recorded 0.49 of an inch at the airport.

Meteorologist Andrew Snyder said last week the weather service was estimating between an inch and an inch and a half of rain falling this weekend.

“With the recent wet conditions, we will be susceptible to flooding more easily than might otherwise be expected,” he said.

“If there is heavy rainfall, there could be flash flooding and localized, very fast rises of water.”

Just two weeks into the month, the Baltimore region has already seen far more rain than average for August. Measurements at the airport recorded 7.85 inches of rain so this month, compared with 1 inch last year. On average, August typically gets 1.44 inches of rain.

The past four days have seen just over 4 inches of rain.

Wednesday’s storm, which caused flash flooding and tree damage in some parts of Howard and Baltimore counties, brought 3.51 inches of rain, an unusually high number for August. The record high on a single day in the month is 7.62 inches, which fell on August 23, 1933.

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