Maryland Weather Meteorology, astronomy and climate conditions in the Baltimore region

Maryland weather: Flash flood watch in effect through Wednesday; Baltimore on pace for wettest July ever

The Baltimore region is at significant risk of flash flooding as the week begins, with more rain falling on ground that’s already saturated, the National Weather Service warned.

A flash flood watch is in effect through early Wednesday morning for the Baltimore area, with Harford County and parts of Baltimore County under a flood warning until 9:45 p.m. Monday. A coastal flood watch is also in effect for Anne Arundel County

“Multiple rounds of showers and thunderstorms are expected,” according to the weather service. “These factors could lead to flash flooding of small streams and creeks.”

With nearly 10 inches of rain having already falling so far this month and more rain on the way, this July may be perhaps the soggiest in Baltimore’s history.

“We’re definitely on pace for one of the wettest if not the wettest July on record for the Baltimore area,” said Dan Hofmann, meteorologist with the National Weather Service.

As of Sunday evening, 9.55 inches of rain had been recorded for the month at BWI Marshall airport. Only July 1905 and July 1889 were wetter, with 10.65 inches and 11.03 inches of rain respectively.

Between half an inch and three-quarters of rain are expected for Monday, according to the weather service. Thunderstorms are possible throughout the rest of the week, and the flash flood watch may have to be extended.

The wet weather is expected to keep the region cooler than it has been in recent weeks. The temperatures are forecast to be in the 80s until Friday, when the high will go back up to about 90 degrees.

Baltimore received more than 5 inches of rainfall over the weekend, most of which fell Saturday. The historic average for the weekend was .27 inches. So far, Baltimore has seen nearly 7 more inches of rain in July than the historic average, according to forecasting service Weather Underground.

An incident with a stranded MTA bus in Dundalk on Monday was resolved on its own. According to MTA spokesman Paul Shepard, cars around the bus had become stranded in floodwaters. But the water receded after just 20 minutes.

Rising water shut down a few roads in Baltimore County and nearby areas Monday. River Road in Oella and Thistle Road in Catonsville were both shut down Monday due to flooding. In Anne Arundel County, sections of Route 450 were closed, as well as the I-695 inner loop at exit 6A. In Cecil County, Route 7 was shut down between White Hall Road and Creswell Ave.

In Baltimore County, several vehicles became stranded in high water over the weekend, particularly in the Catonsville area, said Elise Armacost, spokeswoman for Baltimore County Fire and Emergency Management. Most incidents involved “vehicles that tried to drive through water and found it was deeper” than the driver had realized, she said.

Baltimore Sun reporter Talia Richman contributed to this article.

crentz@baltsun.com

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