Uncapped Southern Missouri Heat Primed for 70 MPH Gusts into Illinois — SevereWX

Southern Missouri's uncapped environment is fueling a growing severe wind threat this afternoon.

SPC's Mesoscale Discussion 2001 highlights central and southern Missouri into southwest Illinois as the prime zone for storms capable of 55-70 mph damaging gusts. With surface temps hitting 100°F, a hot, well-mixed boundary layer has erased capping south of lingering boundaries from earlier activity. MLCAPE soars to 2000-3000 J/kg, setting the stage for intense development.

An MCV along the IA-MO border provides lift to the north, but the real action brews farther south where CAMs show initial discrete storms potentially growing upscale into an MCS tracking into southern Illinois tonight. While models vary on exact initiation, the signal for wind damage is clear—especially if cold pools coalesce.

Watch issuance odds sit at 60%, with convective trends under close watch. Affected WFOs include LSX (St. Louis), SGF (Springfield), EAX (Kansas City), and PAH (Paducah). Check SPC's MD graphic for the latest polygon.

This fits into a broader severe day across the Plains and East, but Missouri's heat-driven setup stands out for evening wind potential.

Stay prepared: Monitor radar, secure outdoor items, and have a severe weather plan ready. Alerts via NOAA Weather Radio or apps can provide critical lead time.