Harford County Under Tornado Watch

The National Weather Service has issued a tornado watch for Harford County and much of Maryland until 10 p.m. Friday.

A watch means it is probable a tornado will happen; a warning is when it is imminent, according to the National Weather Service.

The Harford County Emergency Operations Center issued an alert message about the watch around 3:20 p.m.

"This means that conditions are favorable for strong to severe storms, which could mean the development of tornadoes," Linda Ploener with Harford emergency operations said in the alert call.

The forecast shows heavy rain, along with strong winds and thunderstorms, will move through the area as a cold-front approaches. See the latest forecast for Havre de Grace from the National Weather Service.