First Alert Forecast: Severe Storms Threaten Midwest Friday Evening

Published: July 7, 2025 | First Alert Weather Team

A potent storm system is barreling toward the Midwest, threatening to unleash a round of severe weather late Friday evening. The National Weather Service has placed portions of Illinois, Indiana, and Ohio under a slight to enhanced risk (Level 2–3 of 5) for damaging winds, large hail, and isolated tornadoes.

Timing & Threat Breakdown

The main window for severe storms runs from roughly 5 p.m. Friday through midnight Saturday. The strongest cells are expected to develop along a cold front moving eastward from the Mississippi River Valley. The primary threats include:

• Damaging winds – Straight-line gusts up to 70 mph, capable of downing trees and power lines.
• Large hail – Up to golf ball size in the most intense supercells.
• Isolated tornadoes – A low but non-zero risk, especially in central Indiana and western Ohio.

Why This Storm Is Different

Unlike typical summer popcorn thunderstorms, this system is driven by a powerful upper-level jet streak and abundant Gulf moisture. The combination of strong wind shear (0–6 km shear of 45–55 knots) and moderate instability (CAPE values of 2000–3000 J/kg) creates an environment favorable for organized severe storms, including bow echoes and possibly a few supercells.

Exclusive Perspective: A Pattern Shift

This storm marks the beginning of a more active pattern across the Midwest after a relatively quiet June. Meteorologists note that the positioning of the jet stream is more typical of mid-May, which could extend the severe season deeper into July. “We’re seeing a rare July setup that usually produces severe weather events once every 5–10 years,” said Dr. Lisa Carlson, a severe weather researcher at the University of Illinois. “Residents should not let their guard down just because the calendar says summer.”

Safety Guidance

• Stay weather-aware: Charge devices, ensure NOAA weather radios are operational.
• If a tornado warning is issued, move to the lowest level of your home, away from windows.
• Secure outdoor furniture and trash cans that could become projectiles.
• Avoid driving through flooded roadways – turn around, don’t drown.

Looking Ahead

The First Alert team will continue to monitor the storm’s evolution through Friday evening. Additional updates, including neighborhood-level watches and warnings, will be posted to our mobile app and social channels. For the most current radar and hour-by-hour forecast, visit our weather page.

Stay safe, stay informed, and check back for the latest First Alert updates.