Overnight Storm Clusters Eye Large Hail, 80 MPH Winds in Northern Midwest to Upper MI — SevereWX

Overnight Storm Clusters Eye Large Hail, 80 MPH Winds in Northern Midwest to Upper MI

Storms bubbling along a stalled boundary in northern Minnesota and Wisconsin are showing signs of strengthening into the overnight hours, potentially leading to clustered activity pushing into western and central Upper Michigan.

The Storm Prediction Center highlights a conditionally favorable setup with MUCAPE exceeding 2000 J/kg and robust deep-layer shear supporting isolated large hail up to 2.50 inches and damaging gusts to 80 mph from the most intense cells. While currently elevated to the cool side of the boundary, low-level warm advection is expected to spark more development, increasing coverage and the odds of upscale growth.

A 60% chance of watch issuance reflects confidence in this evolution if ongoing cells intensify or new clusters form. Peak hazards include 1.50-2.50 inch hail, 65-80 mph winds, and isolated gusts to 90 mph.

This subtle overnight shift could catch areas off-guard, especially with storms departing from diurnal peaks. Guidance shows clustering potential, though realization has lagged so far.

Stay prepared: Enable wireless alerts, monitor local NWS updates, and secure outdoor items before dusk. Have a severe weather plan ready for hail and wind impacts.