Central Nebraska Supercells Set to Fire with Giant Hail, Damaging Winds — SevereWX

Central Nebraska Supercells Set to Fire with Giant Hail, Damaging Winds

Storms are gearing up for a serious punch in portions of central and southern Nebraska this evening. The Storm Prediction Center's latest Mesoscale Discussion highlights strong to severe thunderstorm development expected within the next 1-2 hours, along a surface confluence zone spilling over from northern Kansas.

Towering cumulus is already bubbling up, fueled by eroding convective inhibition from a strengthening southerly low-level jet and a nearby mid-level shortwave trough. Once initiated, these storms should organize into supercells thanks to robust buoyancy and effective shear.

Primary threats:

• Very large hail: Most probable 1.50-2.50 inches (golf ball to tennis ball size), driven by steep mid-level lapse rates and elongated hodographs.
• Damaging winds: 65-80 mph gusts likely as storms grow upscale and cold pools coalesce.
• Tornado potential: A spin-up or two possible if storms stay surface-based, with peak intensity up to 90 mph.

A Severe Thunderstorm Watch is 80% likely within the hour, covering the MD area valid until about 1 AM CDT. Convection may elevate later due to low-level stabilization, but the hail and wind risks remain high.

This setup differs from recent Plains action, focusing on central/southern Nebraska rather than the Dakotas or northwest corners. Keep an eye on radar as initiation ramps up around 7-9 PM CDT.

Stay prepared: Have a severe weather plan, monitor local NWS updates, and seek shelter if warnings issue. Know your safe spot away from windows.