2-Inch Hail Looms Midwest as Gusty Supercells Fire Montana — SevereWX

2-Inch Hail Looms Midwest as Gusty Supercells Fire Montana

Upper Midwest takes priority with storms organizing fast in northern Iowa, southeast Minnesota, and southwestern Wisconsin. SPC sees a high chance (80%) of a tornado watch as heating battles cloud cover near a surface trough and cold front. Expect splitting supercells fueled by 40-45 kt shear, packing 1.5-2.5 inch hail (golf ball to tennis ball size) -- biggest threat west near Iowa -- plus damaging winds to 60 mph. Storms are just starting but could explode into evening.

Meanwhile in the Northern Rockies, isolated strong storms are bubbling over southern Montana into far northern Wyoming. Ahead of a shortwave trough, steep lapse rates from intense heating (mid-80s) mix with 40-55 kt upper winds for organized cells, maybe supercells. 65-80 mph gusts lead the hazards thanks to dry air below clouds, with hail up to 1.25 inches possible but limited by weaker instability. Wyoming's threat is iffier under clouds.

These are two Mesoscale Discussions (MCDs) from SPC -- short-term alerts (2-6 hours) flagging fast-evolving severe risks too small for Day 1 outlooks. They signal close monitoring, with watches very possible (60-80% odds). Not every storm will hit severe, but the potent ones could.

Stay prepared: Charge devices, know your safe spot, monitor radar via apps like RadarScope or local NWS. Have helmets ready for hail, secure outdoor items for winds. Check SevereWX.net for updates -- safety first this stormy Tuesday afternoon!