St. Louis, MO – While much of the region will remain warm, dry, and partly sunny today, a conditional threat for isolated strong to severe thunderstorms exists across parts of southeast Missouri and southwest Illinois, according to the National Weather Service (NWS) in St. Louis.
Forecasters expect highs between 60 and 74 degrees with gradually decreasing cloud cover through the afternoon for most communities. However, a narrow corridor stretching across the southeastern portion of the forecast area may see thunderstorms develop if enough instability materializes.
According to NWS, storm chances remain relatively low—around 20% to 30%—but any storm that does form could become strong. Hazards include occasional gusty winds up to 50 mph, hail up to one inch in diameter, and the potential for a brief, weak tornado. Better storm chances exist east of the region, but the environment may still support isolated development locally.
Most of eastern Missouri and western Illinois, including the St. Louis metro, should experience a dry day with mild temperatures and light breezes. Areas farther southeast—including Cape Girardeau, Perryville, Farmington, Sparta, and Chester—are more likely to be near the zone of possible storm formation.
Tonight, conditions remain quiet with clearing skies and mild lows, setting up a stretch of dry weather midweek.
NWS advises residents in southeast Missouri and southwest Illinois to stay mindful of the low-end but non-zero severe weather risk through the afternoon. Rapidly changing conditions are possible if a storm manages to form in the region.
