SPC Severe Thunderstorm Watch 423

WW 423 SEVERE TSTM MA NY VT LO 301715Z - 010000Z URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 423 NWS Storm Prediction Center Norman OK 115 PM EDT Tue Jun 30 2026 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Far western Massachusetts Central and Eastern New York Far southern Vermont Lake Ontario * Effective this Tuesday afternoon and evening from 115 PM until 800 PM EDT. * Primary threats include... Scattered damaging wind gusts to 70 mph likely Isolated large hail events to 1.5 inches in diameter possible A tornado or two possible SUMMARY...A well-organized and fast-moving cluster of storms will continue southeastward this afternoon with a primary concern for damaging winds as storms progress southeastward. Additional peripheral development is also possible this afternoon across other parts of the nearby region within an unstable air mass. The severe thunderstorm watch area is approximately along and 70 statute miles east and west of a line from 25 miles north northwest of Watertown NY to 55 miles east of Binghamton NY. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU3). PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A Severe Thunderstorm Watch means conditions are favorable for severe thunderstorms in and close to the watch area. Persons in these areas should be on the lookout for threatening weather conditions and listen for later statements and possible warnings. Severe thunderstorms can and occasionally do produce tornadoes. && AVIATION...A few severe thunderstorms with hail surface and aloft to 1.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A few cumulonimbi with maximum tops to 600. Mean storm motion vector 31040. ...Guyer Read more