National Weather Service United States Department of Commerce

Severe weather possible from Upper Midwest across Ohio Valley and into central Appalachians, as well as for parts of Mid-Atlantic and Desert Southwest

Scattered severe thunderstorms are expected to develop Thursday afternoon and evening over parts of the Upper Midwest and Ohio Valley and into the central Appalachians, as well as across parts of the Mid-Atlantic and the Desert Southwest. Damaging wind and large hail will be the main threats for all three areas.
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Current Conditions

St. Louis County

Zone Forecast

  • Tonight Mostly clear. Low in the upper 70s. Highest heat index readings of around 100 early in the evening. Southwest wind around 10 mph.
  • Friday Hot and humid. Mostly sunny. High in the upper 90s. Highest heat index readings of around 107 in the afternoon. Southwest wind around 10 mph.
  • Friday Night Mostly clear. Low in the mid 70s. Highest heat index readings of around 100 early in the evening. Light wind.
  • Saturday Hot and humid. Mostly sunny. High in the upper 90s. Highest heat index readings of around 106 in the afternoon. Light wind.
  • Saturday Night Mostly clear. Low in the mid 70s. Highest heat index readings of around 100 early in the evening. Light wind.
  • Sunday Hot and humid. Mostly sunny. High in the upper 90s. Highest heat index readings of around 106 in the afternoon.
  • Sunday Night Mostly clear. Low in the mid 70s. Highest heat index readings of around 100 in the evening.
  • Monday And Monday Night Mostly clear. High in the mid 90s. Low in the mid 70s. Heat index readings of around 100.
  • Tuesday And Tuesday Night Partly cloudy with a 20 percent chance of showers and thunderstorms. High in the mid 90s. Low in the lower 70s. Heat index readings of around 100.
  • Wednesday And Wednesday Night Partly cloudy. A 30 percent chance of showers and thunderstorms. High around 90. Low around 70.
  • Thursday Partly sunny with a 40 percent chance of showers and thunderstorms. High in the upper 80s.