National Weather Service United States Department of Commerce

Oppressive heat and humidity building into the central and southeast U.S.

A heat wave is building into parts of the central and southeast U.S. this week. The combination of heat and humidity will lead to dangerous heat indices, especially in parts of the central Mississippi River Valley where an Excessive Heat Warning is in effect. Heat Advisories are in effect elsewhere across the region. Relief is not expected for several days.
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Hazardous Weather Conditions

Current Conditions

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Storm Lake IA

7 Day Forecast

For More Weather Information:

Sioux Falls, SD Local Forecast Office

Tonight

Scattered Thunderstorms Chance for Measurable Precipitation 30%

Scattered
Thunderstorms

Low: 69 °F

Thursday

Mostly Sunny

Mostly
Sunny

High: 87 °F

Thursday
Night

Slight Chance Thunderstorms Chance for Measurable Precipitation 20%

Slight Chc
Thunderstorms

Low: 69 °F

Friday

Chance Thunderstorms Chance for Measurable Precipitation 30%

Chance
Thunderstorms

High: 86 °F

Friday
Night

Thunderstorms Likely Chance for Measurable Precipitation 70%

Thunderstorms
Likely

Low: 69 °F

Saturday

Chance Thunderstorms Chance for Measurable Precipitation 30%

Chance
Thunderstorms

High: 86 °F

Saturday
Night

Chance Thunderstorms Chance for Measurable Precipitation 40%

Chance
Thunderstorms

Low: 68 °F

Sunday

Chance Thunderstorms Chance for Measurable Precipitation 30%

Chance
Thunderstorms

High: 84 °F

Sunday
Night

Chance Thunderstorms Chance for Measurable Precipitation 30%

Chance
Thunderstorms

Low: 62 °F

Detailed Forecast

  • Tonight Scattered showers and thunderstorms, mainly between 2am and 4am. Mostly cloudy, with a low around 69. South southeast wind around 10 mph. Chance of precipitation is 30%.
  • Thursday Mostly sunny, with a high near 87. South southwest wind 5 to 15 mph.
  • Thursday Night A slight chance of showers and thunderstorms before 4am. Partly cloudy, with a low around 69. South southwest wind around 5 mph becoming calm after midnight. Chance of precipitation is 20%.
  • Friday A chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 86. East wind around 5 mph becoming calm. Chance of precipitation is 30%.
  • Friday Night Showers and thunderstorms likely, mainly after 1am. Mostly cloudy, with a low around 69. East wind 5 to 10 mph. Chance of precipitation is 70%.
  • Saturday A chance of showers and thunderstorms. Mostly cloudy, with a high near 86. Chance of precipitation is 30%.
  • Saturday Night A chance of showers and thunderstorms. Mostly cloudy, with a low around 68. Chance of precipitation is 40%.
  • Sunday A chance of showers and thunderstorms. Partly sunny, with a high near 84. Chance of precipitation is 30%.
  • Sunday Night A chance of showers and thunderstorms. Mostly cloudy, with a low around 62. Chance of precipitation is 30%.
  • Monday A chance of showers and thunderstorms. Partly sunny, with a high near 75. Chance of precipitation is 30%.
  • Monday Night A chance of showers and thunderstorms. Mostly cloudy, with a low around 60. Chance of precipitation is 30%.
  • Tuesday A chance of showers and thunderstorms. Partly sunny, with a high near 79. Chance of precipitation is 40%.
  • Tuesday Night Showers and thunderstorms likely. Mostly cloudy, with a low around 63. Chance of precipitation is 60%.
  • Wednesday A chance of showers and thunderstorms. Mostly cloudy, with a high near 75. Chance of precipitation is 40%.