St. Louis is waking up to a pleasant Saturday — partly sunny skies and a high near 86°F — but a major storm system is tracking toward the metro tonight, and residents should have a plan before sunset.
Today’s Setup
The National Weather Service says isolated shower activity across central Missouri will fizzle by mid-morning, leaving the rest of the afternoon dry. Expect partly sunny skies, a high near 86°F, and light northwest winds around 5 mph. By St. Louis summer standards, it’s a comfortable afternoon. Forest Park, the Gateway Arch grounds, and the area’s golf courses are all in great shape today — take advantage of this window while it lasts.
Best Window To Be Outside
Saturday afternoon and early evening are your sweet spot. Heading to the Hollywood Casino Amphitheater tonight for Santana & The Doobie Brothers - Oneness Tour 2026? Good news: the NWS expects the storm complex to push into central Missouri well after midnight CT, so the show should roll under mostly cloudy but dry skies. Bring a portable misting fan and an insulated water jug 1 gallon for the warm, humid evening. A Santana t-shirt is the perfect outfit for a legendary outdoor show.
Rain, Wind, and Flood Risk
Here’s the serious part. A Flash Flood Watch goes into effect late tonight through early Monday. The Weather Prediction Center has issued a Moderate Risk of Excessive Rainfall for the Missouri Valley, with a large storm complex (MCS) developing across Kansas and Nebraska and tracking southeast through the night. By Sunday, the National Weather Service puts precipitation coverage at 90%, with south winds 6 to 15 mph and gusts as high as 28 mph — and there is an explicit threat of tornadoes and damaging wind gusts across the St. Louis metro through late Sunday evening.
Stay home Sunday if you can. Keep your emergency first aid kit accessible and monitor NWS St. Louis closely. Power outages are possible with a storm this organized — the DARAN 288Wh Power Station is just $90 for Prime members and can keep phones and devices charged through any outage.
Cardinals at Busch Stadium — Eyes on Monday
The St. Louis Cardinals host the Arizona Diamondbacks at Busch Stadium on Monday, June 22 and Tuesday, June 23. Monday looks considerably better than Sunday — a high near 79°F with a 43% chance of lingering showers. Check the Busch Stadium gameday weather forecast before you head downtown. A soft cooler backpack is perfect for tailgating on Clark Avenue. Gear up in a St. Louis Cardinals jersey or a St. Louis Cardinals fitted cap, and Get tickets on SeatGeek if you still need seats.
Tonight’s Dinner
With the storm closing in, tonight is a great excuse to stay in and keep it simple — pasta or a quick stir-fry is satisfying without heating the kitchen. You can order groceries on Amazon and have everything delivered well before the storms arrive.
Next Few Days
Sunday is the day to hunker down: 90% storm coverage, tornado threat, and flash flooding risk. Monday offers some improvement near 79°F. The National Weather Service is signaling below-average to seasonably cool temperatures heading into next week — a welcome change after this wet, stormy stretch. Keep up with the latest at the St. Louis weather forecast.
