ST. LOUIS | The St. Louis weather week opens with storm risk and then turns sharply toward heat, giving residents two different planning problems between 26 June and 3 July.
Friday brings clouds, humidity, showers and a heavy thunderstorm risk, with storms capable of damaging winds, flash flooding and hail. Saturday remains humid with another thunderstorm chance before the pattern changes. By Sunday, the city moves into a dangerous heat-wave setup, with highs expected to climb into the mid- and upper 90s for several days.
Day-by-day outlook
Friday: 80°F high, 69°F low, humid with showers and a heavy thunderstorm risk. Saturday: 81°F high, 73°F low, humid with a thunderstorm. Sunday: 96°F high, 74°F low, mostly sunny and humid as dangerous heat begins. Monday: 96°F high, 75°F low, hot with sun and a few clouds. Tuesday: 97°F high, 77°F low, mostly sunny and hot. Wednesday: 98°F high, 77°F low, partly sunny and hot. Thursday: 98°F high, 78°F low, hot with a shower in places. Friday, 3 July: 96°F high, 75°F low, hot and humid with an afternoon thunderstorm in spots.
The main public-service message is timing. Outdoor work, youth sports, riverfront plans and holiday travel should be adjusted around the early storm window and the later heat stretch. Heat risk becomes more important after Sunday, especially for people without reliable air conditioning, outdoor workers, older adults and children.
This is a weather brief, not a live warning article. Readers should check official National Weather Service alerts before travel, outdoor events or river activity, especially if storms develop faster than forecast.
Additional Reporting By: National Weather Service St. Louis; NOAA.