St. Louis rolled out of bed under a low gray ceiling and a mild 65°F this morning. Clouds should crack here and there this afternoon, letting temps climb into the low 80s, but the real action will be a batch of showers and a few thunderstorms late tonight. Most of those storms are expected to be run-of-the-mill pulse cells, though brief heavy downpours could still trigger some localized street flooding. No watches or warnings are posted as of this morning.
Tonight: Showers And Localized Heavy Rain
Showers and thunderstorms are favored late Saturday evening into the overnight window, roughly between 7 p.m. and 11 p.m., then tapering as we head toward sunrise Sunday. The forecast discussion from the National Weather Service puts overnight rain chances around 60% and highlights a 20% chance of "highly localized pockets of 1-2 inches of rain," which would be enough for brief heavy downpours and poor-drainage flooding to be the main issues. Winds stay light near 5 mph, so plan on wet roads and lightning as the primary impacts rather than damaging straight-line gusts.
Sunday And Memorial Day Outlook
Sunday, May 24 is expected to trend drier across most of the metro, though a few morning showers or a slight chance of afternoon storms could still pop up, mainly along and south of the I-44/I-70 corridor. Memorial Day, Monday, May 25 should run near to slightly above average with a high near 84°F, giving a more cooperative window for outdoor plans and backyard grilling. For official hourly timing and a detailed point-and-click forecast, check the NWS St. Louis.
Quick Tips
If you have outdoor plans this evening, it is worth bumping them earlier or moving things inside and keeping a close eye on radar. Skip driving through standing water — even shallow water can stall a car — and bring in or tie down lightweight yard items in case a downpour blows through. Make sure wireless emergency alerts are enabled on your phone or have a NOAA Weather Radio handy, and check for updates before heading out; for background on the broader weekend setup, see our earlier coverage.
