St. Louis is starting Friday, March 13, 2026, on a gentle note: mild, mostly clear, and sitting in the upper 40s with a steady west wind. By late afternoon, temperatures should climb into the low 60s under partly sunny skies. It will stay breezy enough to feel a bit cooler at times, so a light jacket still earns a spot in the morning commute, and you will notice those gusts building as the day goes on.
Afternoon Winds Kick Up Some Trouble
West winds of 9 to 15 mph are expected to strengthen through the day, with gusts that could reach around 31 mph in more exposed spots. Wind Advisories are in effect this morning for parts of Missouri and Illinois, and those stronger gusts can make driving tricky for high-profile vehicles. Patio chairs, trash cans, and anything else left loose could go traveling, so it is a good idea to tie things down or bring them in before the midday peak. For the latest watch and warning status, check updates from the local forecast office.
Weekend Flip: Sunny Saturday, Volatile Sunday
Saturday is the calm before the chaos, a warm and dry day with mostly sunny skies and highs topping out in the mid to upper 60s. Sunday, March 15, 2026, is the one to circle on the calendar. Rain looks likely from roughly 7 a.m. to 4 p.m., followed by a strong cold front that should sweep through and kick off periods of heavy rain and thunderstorms. Late Sunday into Monday, that same front is expected to send temperatures tumbling and flip the rain over to snow for a brief window.
From Spring Storms To Slushy Roads
The storm setup carries a risk for strong to severe thunderstorms Sunday afternoon and evening, mainly across southeastern Missouri. Damaging wind gusts are the main concern, with a smaller but still notable tornado threat in some areas. As colder air pours in late Sunday night into Monday morning, precipitation is expected to change to snow, with a short period of accumulating snow possible. Some spots could see around an inch, with higher totals favored north of I-70. Monday will feel like a different season entirely, with highs only in the upper 20s and the potential for slick spots on bridges and overpasses.
How To Get Ready Before It Hits
If you have outdoor plans, Saturday is your best bet. Get errands, yard work, and any last-minute prep done, and move anything portable indoors before Sunday, since conditions are expected to go downhill quickly once the front arrives. The City of St. Louis Emergency Management is urging residents to sign up for local alerts and revisit their severe-weather game plan. You can find preparedness guides and the NotifySTL signup on St. Louis Emergency Management.
Forecast details and storm timing may shift as the system approaches, so it is smart to keep an eye on updates through the weekend and stay alert for any watches or warnings that get issued for the St. Louis region. For official forecast information, visit the National Weather Service St. Louis.
