UPDATE: A Severe Thunderstorm Watch is also now in effect.

Original story below…

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NOTTINGHAM, MD—The National Weather Service has issued a Flash Flood Watch for Baltimore County and Baltimore City.

The watch will be in effect until 2 a.m. on Thursday.

Showers and scattered thunderstorms are expected to arrive on Wednesday night. Average rainfall amounts of one-half to one inch are expected.

Thunderstorms, however, will contain very heavy rainfall with rainfall rates around 1 to 3 inches per hour. Localized rainfall amounts of 2 to 4 inches are possible.

Heavy amounts of rain in a short period of time may cause creeks and streams to rapidly rise out of their banks and lead to flash-flooding in urban areas.

Residents should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.