Fast-Moving SD MCS Targets Minnesota-Iowa with 90 MPH Gusts, 1-Inch Hail — SevereWX

A potent convective cluster is barreling eastward from southeast South Dakota at 35 knots, primed to deliver severe weather to southwest and south-central Minnesota along with northwest and north-central Iowa tonight.

Recent reports include 70 mph gusts in Douglas County, SD, and radar shows rising echo tops hinting at further intensification. Downstream conditions are ripe: dewpoints in the upper 70s to low 80s fueling extreme buoyancy with MLCAPE exceeding 3500 J/kg. This setup favors damaging straight-line winds up to 90 mph, with isolated large hail to 1.25 inches possible.

The Storm Prediction Center notes a 95% chance of a Severe Thunderstorm Watch issuance within the hour to cover these hazards. Peak threats include wind gusts of 75-90 mph, making this a high-impact event for evening commutes and outdoor activities.

Track the latest via SPC's Mesoscale Discussion 1736 and monitor radar for updates as the line strengthens.

Preparedness: Secure outdoor items, avoid flooded roads, and have multiple alert sources ready—stay safe out there.