ST. LOUIS — Dense fog has developed overnight. Visibilities will be less than a half mile in spots, so leave extra room between yourself and other cars this morning. Fog should lift after sunrise.

After a cool start in the 40s, temperatures will warm to near 70 today. Mostly clear skies to start with, with some additional clouds rolling in for the afternoon. A great day for Weather Day at Busch Stadium and a daytime Cardinals game. Clear tonight, wake-up temperatures are in the 40s. Another nice day Thursday, highs again near 70, before things start to turn unsettled.

St. Louis radar: See a map of current weather here

We’re tracking multiple rounds of showers and thunderstorms, starting early Friday morning and continuing through Monday morning. Some storms during this time could be on the strong side, especially on Friday and Sunday. This stretch of on-and-off again rain will also come with breezy conditions and warm temperatures, with morning lows in the 60s and highs near 80.