Severe storms are expected to hit eastern Missouri and western Illinois by Thursday night, with the potential to bring large hail, damaging winds, and travel disruptions to the St. Louis metro area.
The National Weather Service has issued warnings for storms to develop after 7 p.m. on Thursday, with storms likely affecting major routes such as I-70, I-64, and U.S. Route 40. Cities like St. Louis, Florissant, Arnold, and Columbia, Illinois, are at the highest risk.
These storms could bring gusts over 40 mph and hail, with the chance of isolated but intense cells that could cause tree damage and power outages, similar to past early June weather events.
Emergency officials may activate trained spotters if the storms intensify. It is important for residents to review their safety plans, charge their devices, and avoid outdoor activities on Thursday night.
Before the storms arrive, the region will experience pleasant early summer weather. Monday through Wednesday will stay dry, with sunny skies and temperatures climbing to the upper 80s. However, Thursday will bring increasing humidity, signaling a shift toward unstable weather conditions.
5-Day Weather Snapshot for Eastern Missouri & Western Illinois (June 9–14)
Monday (June 9): Mostly sunny, high of 81°F. Calm conditions.
Tuesday: Sunny, high of 82°F. Overnight low near 62°F.
Wednesday: Sunny, high near 88°F. Partly cloudy overnight.
Thursday: Mostly cloudy, high of 87°F. Storm risk increases after sunset.
Friday: 40% chance of thunderstorms. High of 86°F.
Saturday: Storms likely. High near 86°F.
