Tuesday, March 3, 2026 - Patchy fog is making the morning commute tricky across parts of the St. Louis area, and scattered showers and thunderstorms are likely at times through the day with a high near 58°F. Plan on slower travel where low visibility and downpours line up, and be ready for midday and evening plans to get interrupted by brief heavy rain.
Morning Fog And A Wet Commute
Dense, patchy fog and light drizzle are expected to linger through mid-morning in many neighborhoods, dropping visibility to a quarter mile or less in spots. Drivers should flip on low-beam headlights, watch for slick bridges and ramps, and build in extra time for both surface streets and the highway.
Showers, Thunderstorms And Rain Totals
Showers and thunderstorms are forecast to become more widespread this afternoon and then ramp up again this evening, especially along and north of the I-70 corridor. Some locations could see a soaking 1 to 3 inches of rain through Wednesday night. The National Weather Service says a few storms may produce small hail or brief heavy downpours, and another round of showers and thunderstorms is possible Friday night into Saturday as temperatures climb, with highs near 79°F in parts of the metro. For full timing and details, see the National Weather Service Saint Louis forecast discussion.
Warm Turn And Weekend Outlook
Temperatures trend warmer behind the system, with 60s expected Thursday and the warmest readings Friday before a cold front moves through. That warm-to-cool swing can leave the ground saturated and drainage poor in low-lying areas through the weekend, so expect lingering puddles and slower drying after the heavier showers.
Prepare And Where To Learn More
The City of St. Louis Emergency Management and the NWS offer free storm-spotter talks for residents who want to learn how to spot and report severe weather. A session is scheduled March 5 at the William J. Harrison Center (3140 Cass Ave). Residents are also encouraged to sign up for NotifySTL and keep a weather radio handy; see details from the City of St. Louis Emergency Management.
If you have to drive in heavy rain, slow down, avoid standing water and never try to cross flooded roadways. Check for weather updates before heading out this evening and again on Friday if you have outdoor plans.
