Update: MCV Over Ohio Sparks Afternoon Damaging Wind Threat Across Appalachians — SevereWX
MCV Fuels Isolated Severe Storms in Ohio Valley
A mesoscale convective vortex (MCV) parked over southwest Ohio is setting the stage for scattered severe thunderstorms this afternoon, according to SPC Mesoscale Discussion 2081.
Visible satellite loops reveal the MCV driving a zone of lift north of Columbus, where deep low-level moisture (MUCAPE 1500-2500 J/kg from the 12Z ILN sounding) meets intense daytime heating. Expect MLCAPE to climb to 1500-2000 J/kg ahead of the system, sparking storm coverage and intensity ramps by early afternoon.
While mid/upper winds and shear lag westward—potentially curbing storm organization—steep low-level lapse rates could still pack a punch. Damaging wind gusts of 55-70 mph lead the risks, especially if clusters or lines form. Stronger cells might drop marginally severe hail up to 1.25 inches.
The discussion covers central/eastern Ohio, eastern Kentucky, northern/western West Virginia, and western Pennsylvania/New York. A severe thunderstorm watch looks likely by 17-18Z (12-1 PM EDT), with 60% odds.
Stay prepared: Monitor radar closely, secure outdoor items, and have a severe weather plan ready. Check local NWS updates for the latest.
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