Todays weather in St. Louis MO - Monday - 18 May 2026

(00:00:00) Todays weather in St. Louis MO - Monday - 18 May 2026 (00:00:28) Severe Weather Alert Monday Tuesday (00:01:14) Monday Commute and Storm Rounds (00:01:44) Tornado Risk and Situational Awareness (00:02:04) Sunday Prep Window (00:02:17) Closing Outlook St. Louis gets one more beautiful day before the atmosphere turns hostile. Sunday brings partly cloudy skies, highs near 90 degrees, and lows in the upper 60s tonight — warm, humid, and deceptively calm. Enjoy it, but use it wisely, because a significant severe weather event is already on the doorstep.A Weather Impact Alert is in effect for Monday into Tuesday. Strong to severe thunderstorms are expected to bring damaging winds, golf ball to tennis ball-sized hail, and an isolated tornado threat across the St. Louis metro area. This is a multi-round outbreak, not a single passing storm — Gulf moisture keeps reloading the atmosphere through Tuesday.Critical timing note: storms don't wait for Monday morning. The first activity could arrive after midnight tonight as a cold front pushes through the region. If you have an early Monday commute, check conditions before you leave — roads could already be active.This afternoon is your prep window. Charge phones and backup batteries. Locate flashlights. Bring in outdoor furniture or anything wind could turn into a projectile. Most importantly, get your car under cover now if golf ball hail is in the forecast.Monday and Tuesday are not days to be casual about sky conditions. Keep a weather app with push alerts enabled. Know your shelter location at home and at work. The tornado probability is low but real — situational awareness matters.St. Louis, soak up Sunday. Then button down tonight. Stay safe.This episode includes AI-generated content.