Overnight Elevated Storms Target Large Hail, 80 MPH Gusts in Northern Midwest — SevereWX

Elevated thunderstorms pulsing across northern Minnesota and Wisconsin late evening are showing signs of organization along a stalled baroclinic zone extending into western and central Upper Michigan.

The setup features most-unstable CAPE exceeding 2000 J/kg—plenty of fuel for severe outcomes—paired with robust deep-layer shear favoring storm clustering and upscale growth. So far, isolated storms have managed large hail and damaging wind gusts, but low-level warm advection is expected to spark broader development through the overnight hours.

SPC's Mesoscale Discussion 1755 highlights a 60% chance of watch issuance within the next few hours if cells intensify or merge into a more potent cluster. Peak threats include:

• Hail: 1.50-2.50 inches (golf ball to tennis ball)
• Wind gusts: 65-80 mph
• Tornadoes: Up to 90 mph (low-end EF2)

This evolution has lagged slightly behind guidance, but trends point to a ramp-up, potentially catching late-night residents off-guard in rural northern areas.

Stay prepared: Monitor local NWS updates, have a weather app with alerts enabled, and secure outdoor items before bed. If a watch is issued, be ready to shelter quickly for hail or winds. Check radar frequently overnight.

Valid: ~11 PM CDT Jul 26 to ~1 AM Jul 27, 2026.