St. Louis rolled into Wednesday under a blanket of clouds and humidity, waking up to temperatures in the upper 60s to around 70°F and a stubbornly sticky dewpoint. Highs are expected to climb into the low 80s later today, but the warmup comes with a catch: scattered showers and a few thunderstorms could pop up between about 10 a.m. and 5 p.m. Some neighborhoods, especially east of the Mississippi near the I-70 corridor, could get briefly soaked by heavy downpours while others stay completely dry.
Showers Zero In Along I-70
The best shot at rain and a couple of thunderstorms lines up along and east of I-70 into Illinois, according to the National Weather Service St. Louis. The official forecast calls for about a 30% chance of precipitation and a high near 82°F, with light north winds around 0–5 mph. Because the weather setup is only weakly forced, storms should be more hit-and-miss than widespread, but any cell that does form could drop a quick burst of heavy rain.
Fog, Slick Spots And The Morning Commute
Patchy low-lying fog developed overnight and could briefly cut visibility on riverfront roads and in low spots, so it is worth giving yourself a little extra time if you are driving this morning. Slow-moving, localized downpours can slick up the pavement and create short-lived ponding, so ease off the gas if you run into rain. Riders who depend on buses or trains should check Metro Transit before heading out.
Weekend Outlook
Looking ahead, the forecast trends drier late this week and into the weekend, with highs holding in the low-to-mid 80s and only spotty chances for showers. If you have outdoor plans from Thursday through Sunday, you are in decent shape for sunnier, more consistent weather.
