The National Weather Service of Buffalo has issued severe thunderstorm warnings for western Jefferson County until 7 p.m., and for eastern Jefferson County and Lewis County until 7:30 p.m.
Locations in the warning include Watertown, Calcium, Adams Center, Mannsville, Southwick Beach and Henderson Harbor. The area of Interstate 81 between Exits 38 and 52 also is included in the warning.
Severe thunderstorms capable of producing damaging winds in excess of 60 mph are expected, the service says. Moving northeast at 60 mph, the storms are located along a line extending from 19 miles west of Southwick Beach to 25 miles north of Oswego.
Locations affected by a separate thunderstorm warning until 7:30 p.m. include Fort Drum, West Carthage, Barnes Corners, Highmarket, Lowville, Indian River and Port Leyden.