Echo Tops Surge on SD MCS Poised for 90 MPH Minnesota-Iowa Assault — SevereWX

A potent convective cluster barreling eastward from southeast South Dakota at 35 knots is showing signs of strengthening, with recent increases in echo tops hinting at more intensity ahead.

Already delivering 70 mph gusts—like one in Douglas County—this line remains steady but primed for escalation. Downstream in southwest/south-central Minnesota and northwest/north-central Iowa, low-level dewpoints in the upper 70s to low 80s combine with MLCAPE exceeding 3500 J/kg for extreme buoyancy. Expect severe wind gusts to 75-90 mph, potentially isolated 1-1.25 inch hail.

SPC's Mesoscale Discussion 1736 flags a 95% chance of a Severe Thunderstorm Watch issuance within the hour to cover these hazards through around 2:45 AM CDT.

This evening threat targets populated corridors, where damaging winds could down trees, power lines, and cause widespread outages. Hail may dent vehicles and damage crops.

Track it live: SPC graphic here. Monitor radar via local NWS offices (MPX, DMX, FSD).

Preparedness tip: Secure outdoor items, avoid travel under storms, and have multiple alert sources ready—NOAA radio, apps like SevereWX.net. Power outages possible; charge devices now.