Dangerous Heat and Humidity Building from the Plains to the East Coast

A strengthening ridge of high pressure will produce much above average temperatures from the Plains to the East Coast, a true summer heat wave. Highs in the 90s and triple digits combined w/ humidity and dewpoints surging into the upper 70s, if not low 80s, will create heat indices as high as 110 to 115 through this weekend. Air quality will likely be poor due to haze and little air circulation. Read More >

Current conditions at

Sioux City, Sioux Gateway Airport (KSUX)

Lat: 42.4°NLon: 96.38°WElev: 1099ft.

A Few Clouds

71°F

22°C

Humidity 100%
Wind Speed SW 7 mph
Barometer 29.72 in (1005.5 mb)
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Last update 18 Jul 5:52 am CDT
Extended Forecast for

5 Miles NNE Sioux City IA

Excessive Heat Warning until July 19, 08:00pm
Click here for hazard details and duration
Excessive Heat Warning
  •  
    Excessive Heat Warning until July 19, 08:00pm

    NOW until
    8:00pm Fri

    Excessive Heat Warning

  • Today

    Today: A slight chance of showers and thunderstorms before 7am.  Patchy fog between 7am and 9am.  Otherwise, sunny and hot, with a high near 95. Heat index values as high as 106. West northwest wind 5 to 10 mph becoming south in the afternoon.  Chance of precipitation is 20%.

    Slight Chance
    T-storms and
    Patchy Fog
    then Sunny

    High: 95 °F

  • Tonight

    Tonight: Mostly clear, with a low around 74. West southwest wind 5 to 10 mph becoming east southeast after midnight.

    Mostly Clear

    Low: 74 °F

  • Friday

    Friday: Mostly sunny and hot, with a high near 97. Heat index values as high as 110. South wind 5 to 15 mph.

    Hot

    High: 97 °F

  • Friday
    Night

    Friday Night: A slight chance of showers and thunderstorms.  Partly cloudy, with a low around 73. South southwest wind around 5 mph becoming northeast in the evening.  Chance of precipitation is 20%.

    Slight Chance
    T-storms

    Low: 73 °F

  • Saturday

    Saturday: A chance of showers and thunderstorms, mainly after 1pm.  Partly sunny, with a high near 87. East wind 5 to 10 mph.  Chance of precipitation is 30%.

    Chance
    T-storms

    High: 87 °F

  • Saturday
    Night

    Saturday Night: A chance of showers and thunderstorms.  Mostly cloudy, with a low around 66. Northeast wind 5 to 10 mph.  Chance of precipitation is 40%.

    Chance
    T-storms

    Low: 66 °F

  • Sunday

    Sunday: Partly sunny, with a high near 84.

    Partly Sunny

    High: 84 °F

  • Sunday
    Night

    Sunday Night: Partly cloudy, with a low around 62.

    Partly Cloudy

    Low: 62 °F

Detailed Forecast

Today
A slight chance of showers and thunderstorms before 7am. Patchy fog between 7am and 9am. Otherwise, sunny and hot, with a high near 95. Heat index values as high as 106. West northwest wind 5 to 10 mph becoming south in the afternoon. Chance of precipitation is 20%.
Tonight
Mostly clear, with a low around 74. West southwest wind 5 to 10 mph becoming east southeast after midnight.
Friday
Mostly sunny and hot, with a high near 97. Heat index values as high as 110. South wind 5 to 15 mph.
Friday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 73. South southwest wind around 5 mph becoming northeast in the evening. Chance of precipitation is 20%.
Saturday
A chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 87. East wind 5 to 10 mph. Chance of precipitation is 30%.
Saturday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 66. Northeast wind 5 to 10 mph. Chance of precipitation is 40%.
Sunday
Partly sunny, with a high near 84.
Sunday Night
Partly cloudy, with a low around 62.
Monday
Sunny, with a high near 82.
Monday Night
Mostly clear, with a low around 61.
Tuesday
Sunny, with a high near 83.
Tuesday Night
Mostly clear, with a low around 62.
Wednesday
Sunny, with a high near 85.
Click Map For Forecast
Point Forecast:
5 Miles NNE Sioux City IA
 42.56°N 96.33°W (Elev. 1119 ft)
6:18 am CDT Jul 18, 2019
6am CDT Jul 18, 2019-6pm CDT Jul 24, 2019
 
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Additional Resources

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Hourly Weather Forecast

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