St. Louis weather: First Alert days for flooding, severe risk — June 25, 2026
Advertisement

weather/local/gray

The First Alert Forecast for the St. Louis region from the First Alert Weather Team.

BySteve Templeton
3 hours agoUpdated: June 25, 2026, 4:11 pm EDTPublished: June 25, 2026, 4:07 pm EDT
In partnership with
  • Periods of Rain & Storms Through Saturday
  • Now-Friday: Flash Flood Threat & Low Severe Storm Risk
  • Dangerous Heat Wave Begins Sunday

Download the Free First Alert Weather App Here

Image
Image

FIRST ALERT WEATHER DAYS Today and Friday:

Today Through Friday: Scattered storms will develop with a low risk for isolated pockets of severe wind or hail. Some funnel clouds have been spotted, these are mostly harmless and likely won’t reach the ground, though if one did it would be brief and very weak. Spin in the atmosphere from outflow boundaries or the front itself can get drawn up into a developing shower or storm, causing these funnels. Ingredients today are not conducive for any strong tornadoes. The severe risk will fade after sunset but storms continue. in fact, the heaviest wave of storms will be tonight through Friday morning with the greatest flood risk.

The Flood Watch now goes through Friday evening because the front stalls and more storms bubble up. This flooding will likely be more contained and not as widespread as the heavier wave from Thursday night into Friday morning. But, where storms do develop off and on from morning to evening, let’s be alert for flash flooding. The severe risk Friday for the afternoon through the evening is low but includes severe wind and an isolated tornado threat. Storms should become much more isolated at some point Friday evening and total rainfall from today through Friday evening will range from 1″ to 3″ but isolated areas could see 3-5″.

Image

Saturday: The stalled front slowly begins to lift northward, triggering some new thunderstorm development in the morning and afternoon. There are indications that some of these storms could pose a low-end risk of severe weather. For now, this risk appears very low, but we’ll monitor it for a First Alert Weather Day. Meanwhile, it will be a bit warmer and even more humid.

Dangerous Heat Next Week: Sunday through at least Wednesday are now First Alert weather days for dangerous heat. The temps will be hot, but the humidity will be excessive and miserable, making the peak heat index each day from 105 to 110. And we may extend the First Alert Weather Days if confidence grows on that danger zone of heat and humidity sticking around later in the week, which is certainly possible.

Image

Loading comments...

Advertisement