MOUNTAINSIDE, NJ — A severe thunderstorm spotted over Edison is headed toward southern Union County, according to the National Weather Service.

At 3:28 p.m. the National Weather Service issued a severe thunderstorm watch that remains in effect until 11 p.m. for the region.

Radar indicated strong thunderstorms were located along a line extending from near Morris Plains to Linden. The storms are nearly stationary. Wind gusts of up to 50 m.p.h. and half inch hail are possible with these storms. Locations impacted include... Newark, Elizabeth, Summit, Millburn, Harrison, Caldwell, Orange, Clark, Fairfield, Union, East Orange, Irvington, West Orange, Montclair and Westfield.

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A flood advisory is in effect until 6:30 p.m. and a Flash Flood Warning is in effect until 6:45 p.m.

The National Weather Service warns that torrential rainfall is also occurring with these storms, and may cause localized flooding. Do not drive your vehicle through flooded roadways. Frequent cloud to ground lightning is occurring with this storm. Lightning can strike 10 miles away from a thunderstorm. Seek a safe shelter inside a building or vehicle.

Forecasters warned of 60 m.p.h. wind gusts and hail the size of quarters.