643 ACUS03 KWNS 161927 SWODY3 SPC AC 161926 Day 3 Convective Outlook NWS Storm Prediction Center Norman OK 0226 PM CDT Thu Apr 16 2026 Valid 181200Z - 191200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS OVER MUCH OF THE UPPER OHIO VALLEY... ...SUMMARY... Scattered strong to severe thunderstorms capable of damaging winds and hail will be possible on Saturday from the upper Ohio Valley. ...Synopsis... An upper trough will move toward the upper Great Lakes and OH Valley on Saturday, with a cold front moving quickly east and extending from western NY/PA into KY/TN by 00Z. A narrow plume of upper 50s F to near 60 F dewpoints will exist and contribute to up to 1000 J/kg MUCAPE. Storms will likely be ongoing early in the day along the front as it moves out of IN and into western OH/KY, and 40-50 kt southwest winds at 850 mb may support damaging gusts potential. Heating ahead of the front from OH/PA southward into WV/KY/TN may support new development, although lapse rates aloft over southern areas will be poor. Still, favorable deep-layer mean wind speeds and sufficient shear may support isolated severe gusts or marginal hail, especially into OH/western PA. Further, low-level shear will be strongest over northern areas, with some supercell potential. ..Jewell.. 04/16/2026 $$