North-Central Nebraska Supercells, Wyoming Inflows Target 2.5-Inch Hail, 80 MPH Winds — SevereWX

Thunderstorms are firing up along a ribbon of juicy instability stretching from northwest Nebraska into southwest South Dakota, primed for supercell action this evening.

The Storm Prediction Center's latest Mesoscale Discussion (1473) flags northwest and north-central Nebraska for isolated severe potential, with a 60% chance of a watch issuance within the next couple hours. A mid-level shortwave trough is providing lift, boosting convective coverage as storms organize.

Shear is stout—Rapid City radar data shows 0-6 km winds around 40 knots—paired with steep low-level lapse rates. This setup favors supercells capable of 2.5-inch hail (tennis ball size) and 65-80 mph wind gusts. Shorter line segments could also pack severe downdrafts.

Meanwhile, ongoing storms in southeast Wyoming are holding together, tracking east into western Nebraska. The stronger cells could dump large hail and damaging winds as they push through.

Peak threats per SPC: tornado winds to 90 mph, gusts 65-80 mph, hail 1.50-2.50 inches. Activity peaks through 8 PM CDT.

Stay prepared: Monitor radar closely, secure outdoor items, and have a severe weather plan ready. Check SPC updates at spc.noaa.gov.