ACUS03 KWNS 141916 SWODY3 SPC AC 141915 Day 3 Convective Outlook NWS Storm Prediction Center Norman OK 0215 PM CDT Tue Apr 14 2026 Valid 161200Z - 171200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS FROM THE LOWER OHIO VALLEY REGION INTO PARTS OF NEW YORK... ...SUMMARY... Isolated strong to severe thunderstorms are possible on Thursday extending from southeast Missouri across the Ohio Valley and into parts of New York. ...Synopsis... A progressive pattern will persist on Thursday, with a leading shortwave trough moving quickly across OH valley into the Northeast. This wave will breakdown the ridge along the East Coast, and provide a focus for scattered strong storms. Low-level warm advection out of the west/southwest will help destabilize the region with storms most likely during the afternoon from the Lower Great Lake across much of upstate NY and northern PA. Instability will be sufficient to support a few fast-moving cells capable of marginal hail and locally damaging gusts. To the southeast, storm coverage is less certain, particularly from AR/MO into the lower OH Valley. Here, cool temperatures aloft will linger, aiding instability, though somewhat behind the upper trough affecting the northeastern states. Showers and storms are most likely in the morning in association with the main wave, but conditional severe probabilities will be higher during the afternoon when instability redevelops. Any storms that form will be capable of producing hail, from MO into AR, western TN/KY, IL and IN. ..Jewell.. 04/14/2026 $$