One line is in New York City just before 6 p.m. Monday, July 6. Ping-pong-ball-size hail (of about 1.5 inches in diameter) and 60 miles-per-hour wind gusts have been reported.
The hail could injure people and animals, the National Weather Service warns.
"Expect hail damage to roofs, siding, windows, and vehicles," the weather service said. "Expect wind damage to trees and power lines."
Other lines are potent storms have been reported west of the Hudson River in the area of I-84.
Storm activity is expected to wind down shortly after nightfall on Monday.
Check back to Daily Voice for updates.
Click here to follow Daily Voice Ulster Sullivan and receive free news updates.