St. Louis, MO – Travel and outdoor celebrations in Illinois and eastern Missouri may be disrupted Monday as strong storms target the region late in the day. Thunderstorms are expected to develop Monday evening into Tuesday, potentially affecting Memorial Day events and evening commutes along I-64 and I-55.
According to the National Weather Service in St. Louis, showers will begin Monday afternoon with stronger thunderstorms likely after 7 p.m. Rain will continue into Tuesday, with a 70% chance of thunderstorms that may bring brief gusts up to 30 mph and heavy rainfall. Areas from St. Louis to Brooklyn, IL could see localized street flooding or temporary power outages.
Residents planning barbecues, travel, or outdoor memorial services should monitor local updates and prepare for sudden weather shifts. Officials urge drivers to slow down on wet roads and avoid underpasses prone to flooding. Spotter activation is not expected, but storm development remains possible through Tuesday night.
Extended 5-Day Outlook:
- Wednesday: Partly sunny and calmer, with highs near 74°F — a break from the rain.
- Thursday: High near 76°F, slight chance of afternoon showers.
- Friday: Mostly sunny, high near 77°F.
- Saturday: Warmer and more summer-like, high near 84°F with a 20% chance of storms.
- Sunday: Clear and dry expected, continuing the warming trend.
Stay weather-aware. Storm risks remain possible through Tuesday evening, with more summer-like temperatures building later in the week.
