MOUNT HOLLY, NJ (357 AM EDT MON APR 15 2019) — The National Weather Service in Mount Holly NJ has issued a Severe Thunderstorm Warning for Southeastern Morris County in northern New Jersey Somerset County in northern New Jersey North central Middlesex County in northern New Jersey until 430 AM EDT. At 356 AM EDT, severe thunderstorms were located along a line extending from Mendham to Belle Mead, moving northeast at 55 mph. HAZARD: 60 mph wind gusts and penny size hail. SOURCE: Radar indicated. Damage to roofs, siding, trees, and power lines is possible. Locations impacted include Morristown, Somerville, Somerset, Bridgewater, Madison, Middlesex, Florham Park, East Hanover, Lincoln Park, Bound Brook, Manville, Chatham, Boonton, Butler, Morris Plains, Mendham, Mountain Lakes, Riverdale, Peapack And Gladstone and Far Hills. Remain alert for a possible tornado! Tornadoes can develop quickly from severe thunderstorms. If you spot a tornado go at once into the basement or small central room in a sturdy structure. Intense thunderstorm lines can produce brief tornadoes and widespread significant wind damage. Although a tornado is not immediately likely, it is best to move to an interior room on the lowest floor of a building. These storms may cause serious injury and significant property damage.