Supercells Primed Along NE Nebraska-to-Minnesota Boundary with Large Hail, Tornado Risk — SevereWX

Severe storms are bubbling up along a low-key boundary from northeast Nebraska into southern Minnesota, western Wisconsin, northern Iowa, and far southeast South Dakota.

The Storm Prediction Center's latest Mesoscale Discussion (MD 1429) flags an 80% chance of a tornado watch tonight as a strengthening low-level jet erodes inhibition over a warm, moist air mass (70s dewpoints). Expect widely scattered thunderstorms to spark after 6 PM CDT, organizing into supercells and clusters thanks to 40 kt effective shear and steep lapse rates.

Peak threats include:

• Hail: 1.50-2.50 inches
• Winds: 65-80 mph gusts
• Tornadoes: A couple possible, up to 85-110 mph (EF1-EF2)

Deepening cumulus is already visible along the ENE-WSW boundary. While exact timing is tricky due to subtle lift, SPC forecasters anticipate a watch soon for this all-hazards setup. Storms could mix supercellular and linear modes, hiking risks for damaging winds, hail, and spin-ups amid clockwise-curving low-level winds.

Areas at highest risk: Northeast Nebraska, northern Iowa, southern Minnesota, western Wisconsin, southeast South Dakota. Check SPC's graphic for the precise outline.

Stay prepared: Monitor radar closely, secure outdoor items, know your safe spot, and have multiple alert sources ready. A watch could drop any moment—don't wait for it to arrive.