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UPDATE (5:30 p.m.) -- At the Inner Harbor? Heads up! Storm will likely move into parts of Baltimore City within the hour. Heavy rain and gusty winds possible.

UPDATE (5:11 p.m.) -- Planning to drive north into Pennsylvania tonight? Strong storms are lined up west-to-east just across the state line. You'll run into some heavy rain in some areas.

Radar Update: Planning to drive North into PA this evening? Strong storms are lined up West to East just across the state line! You'll run into some heavy rain in some areas. #MdWx pic.twitter.com/7pwDiaSXdY

UPDATE (4:30 p.m.) -- Storm in northern Frederick County near the Pennsylvania line is 50,000 feet tall, that's big. Strong damaging winds and large hail are likely.

UPDATE (3:30 p.m.) -- So far, just one storm on the radar map. Storms should pick up in coverage as we head into the evening.

UPDATE (3 p.m.) -- The National Weather Service issued a severe thunderstorm watch for much of central Maryland and the Upper Eastern Shore until 9 p.m.

BALTIMORE -- Meteorologist Chelsea Ingram says severe storms will pop up Saturday evening across Maryland.

The timing is around 4-5 p.m. for scattered storms to pop up, becoming more widespread by 7-8 p.m. onward.

Ingram said there will be strong wind gusts and possible flooding in some parts of Maryland. Thunderstorms will produce heavy rainfall with localized rainfall amounts around 1 to 3 inches within an hour or two. Heavy amounts of rain in a short period of time may lead to rapid rises of creeks and streams as well as the potential for flash flooding in urban areas.

LIGHTNING SAFETY: If you can hear thunder, that means the storm is within 10 miles, and you are at risk of being struck by lightning. The safest place to be during lightning is inside a sturdy building that has plumbing and electricity. If that building happens to be struck, the wires and pipes tend to disperse the energy more safely into the ground.

If you are outdoors, without a building nearby, your car is the next safest place to be during lightning. The outdoor metal frame disperses the electricity, preventing it from reaching inside the car.

TORNADO SAFETY: During a tornado warning, go to the lowest level of the building, to the most interior room, and stay away from windows.

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