Eroding CIN Unlocks 70 MPH Gusts in Scorching Western Dakotas — SevereWX

Thunderstorms are ramping up across eastern Montana and northeastern Wyoming's high terrain, poised to surge eastward into the western Dakotas this afternoon. SPC's Mesoscale Discussion 1797 highlights eroding MLCIN amid scorching upper 90s to 100°F temps, dewpoints in the 50s-60s, and steep 7-8°C/km lapse rates. This setup favors strong to severe outflow gusts, with one or more organized clusters possible.

A cluster already hit eastern North Dakota with 57 mph gusts, and downstream environments mirror that potential: moderate instability, dry sub-cloud layers, and sunny skies fueling rapid destabilization. Peak wind gusts could reach 55-70 mph, with hail up to 1.25 inches. Watch issuance odds sit at 60% through 2145Z.

The threat spans eastern Montana, northeastern Wyoming, and western Dakotas—a broad High Plains swath where heat and spreading storms collide for damaging wind risks. Keep an eye on SPC for watch updates.

Stay prepared: Monitor local radar and alerts, secure outdoor items, and have a severe weather plan ready if you're in the path.