Frontal Thunderstorms Charge Up Tornado Risk Along Ohio River — SevereWX

Frontal Thunderstorms Charge Up Tornado Risk Along Ohio River

Storm Prediction Center's Mesoscale Discussion 1816 highlights growing severe potential this afternoon in portions of southern Indiana, Ohio, central Kentucky, and middle Tennessee. Scattered thunderstorms are firing ahead of a cold front and surface cyclone, with storms intensifying along a broad frontal zone in the lower Ohio Valley.

Surface temps have climbed into the upper 70s to low 80s°F amid diffuse heating and a very moist air mass, fueling MLCAPE of 1000-2000 J/kg. Stronger westerly flow aloft provides 30-35 kt effective shear, supporting a mix of clustered multicells and transient supercells. High PWATs could load downdrafts for damaging gusts up to 55-70 mph.

Tornado odds hinge on low-level details: backed flow along the Ohio River in southern IN, northern KY, and southwest OH boosts 0-500m SRH to 75-150 m²/s², enough for a couple EF1-EF2 twisters (85-110 mph). SPC eyes a 40% chance of issuing a watch within the next few hours, though clouds and vague forcing temper confidence.

Most probable peaks: Tornado: 85-110 mph | Wind: 55-70 mph.

Check SPC's MD graphic for the latest polygon. Areas like Louisville, Cincinnati fringes, and Nashville suburbs could see action from 12:30-3 PM CDT.

Stay prepared: Monitor radar, secure outdoors, and have a severe weather plan ready—know your safe spot indoors. Follow @SevereWXnet for updates.