National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Waterloo, Waterloo Municipal Airport (KALO)

Lat: 42.55°NLon: 92.4°WElev: 873ft.

Fair

81°F

27°C

Humidity 47%
Wind Speed S 16 G 28 mph
Barometer 29.63 in (1002.9 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Heat Index81°F (27°C)
Last update 15 May 7:54 pm CDT
Extended Forecast for

Waterloo IA

Severe T-storm Watch May 15, 08:11pm until May 16, 01:00am
Click here for hazard details and duration
Severe T-storm Watch
  •  
    Severe T-storm Watch May 15, 08:11pm until May 16, 01:00am

    NOW until 1:00am Sat

    Severe T-storm Watch

  • Tonight

    Low: 57 °F

    Severe
    Thunderstorms

  • Saturday

    Saturday: Mostly sunny, with a high near 84. Light and variable wind becoming east 5 to 8 mph in the morning.

    High: 84 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A chance of showers, then showers and thunderstorms likely after 10pm. Mostly cloudy, with a low around 58. East southeast wind 7 to 10 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 58 °F

    T-storms
    Likely

  • Sunday

    Sunday: A 50 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 85. Windy, with a south southeast wind 14 to 22 mph, with gusts as high as 36 mph. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 85 °F

    Chance
    T-storms and
    Breezy then
    Chance
    Showers and
    Windy

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Partly cloudy, with a low around 63. Breezy, with a south wind 15 to 20 mph, with gusts as high as 31 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 63 °F

    Breezy.
    Chance
    T-storms then
    Showers
    Likely

  • Monday

    Monday: Showers and possibly a thunderstorm. High near 84. Breezy. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 84 °F

    Showers and
    Breezy

  • Monday Night

    Monday Night: Showers and possibly a thunderstorm before 1am, then a chance of showers. Low around 56. Windy. Chance of precipitation is 80%.

    Low: 56 °F

    Showers and
    Windy

  • Tuesday

    Tuesday: Partly sunny, with a high near 68. Breezy.

    High: 68 °F

    Partly Sunny
    and Breezy

Detailed Forecast

Tonight
Showers and thunderstorms, mainly before 2am. Some of the storms could be severe. Low around 57. South wind 8 to 13 mph becoming light and variable after midnight. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Saturday
Mostly sunny, with a high near 84. Light and variable wind becoming east 5 to 8 mph in the morning.
Saturday Night
A chance of showers, then showers and thunderstorms likely after 10pm. Mostly cloudy, with a low around 58. East southeast wind 7 to 10 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday
A 50 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 85. Windy, with a south southeast wind 14 to 22 mph, with gusts as high as 36 mph. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Partly cloudy, with a low around 63. Breezy, with a south wind 15 to 20 mph, with gusts as high as 31 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Monday
Showers and possibly a thunderstorm. High near 84. Breezy. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Monday Night
Showers and possibly a thunderstorm before 1am, then a chance of showers. Low around 56. Windy. Chance of precipitation is 80%.
Tuesday
Partly sunny, with a high near 68. Breezy.
Tuesday Night
Partly cloudy, with a low around 44. Breezy.
Wednesday
Sunny, with a high near 65.
Wednesday Night
Partly cloudy, with a low around 44.
Thursday
Mostly sunny, with a high near 70.
Thursday Night
Partly cloudy, with a low around 49.
Friday
Mostly sunny, with a high near 74.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Waterloo IA
 42.49°N 92.35°W
Last Update:
7:44 pm CDT May 15, 2026
Forecast Valid:
8pm CDT May 15, 2026-6pm CDT May 22, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation