St. Louis woke up this morning, Friday, April 17, to clear skies, comfortable air, and temperatures near 61°F. By this afternoon, the city is expected to surge into the upper 80s, with showers and thunderstorms possible after 2 p.m. A line of strong to potentially severe storms is on track for late afternoon into the evening, bringing a primary risk of damaging wind gusts and heavy downpours.
Afternoon Into Evening
Storms are most likely to fire up after 2 p.m. and ramp up in intensity through the late afternoon and early evening hours on Friday, April 17, 2026. According to the National Weather Service in St. Louis, the main concern is damaging straight-line winds, with a limited chance of brief tornadoes and occasional large hail in the strongest storms.
Late Night Into Saturday
Showers and thunderstorms are likely Friday night, and many forecasts show a stretch of widespread rain with embedded storms before 1 a.m. Some of those storms could drop heavy…..