Thunderstorms and Heavy Rain in the Mid-South; Heat Continues in the Southeast and Southwest

Severe thunderstorms and heavy rain are expected across portions of the mid-Mississippi Valley into the Ohio Valley and portions of Arizona. Dangerous heat persists in the South and Southeast while building into the Southwest. Overnight lows will be so warm that, when combined with oppressive dew points, little-to-no relief from the scorching daytime highs will be available. Read More >

Hazardous Weather Conditions

Current conditions at

Waterloo, Waterloo Municipal Airport (KALO)

Lat: 42.55°NLon: 92.4°WElev: 873ft.

Mostly Cloudy

69°F

21°C

Humidity 96%
Wind Speed Calm
Barometer 29.92 in (1012.5 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Last update 18 Aug 11:54 pm CDT
Extended Forecast for

Waverly IA

  • Overnight

    Overnight: Patchy fog after 4am.  Otherwise, mostly cloudy, with a low around 61. North wind 3 to 5 mph.

    Low: 61 °F

    Patchy Fog

  • Wednesday

    Wednesday: Patchy fog before 8am.  Otherwise, mostly sunny, with a high near 77. North northeast wind around 6 mph.

    High: 77 °F

    Patchy Fog
    then Mostly
    Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, then gradually becoming clear, with a low around 57. Light east northeast wind.

    Low: 57 °F

    Decreasing
    Clouds

  • Thursday

    Thursday: Sunny, with a high near 78. Calm wind becoming south southwest 5 to 9 mph in the morning.

    High: 78 °F

    Sunny

  • Thursday Night

    Thursday Night: A 50 percent chance of showers and thunderstorms, mainly after 1am.  Partly cloudy, with a low around 63. South wind around 8 mph.  New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 63 °F

    Slight Chance
    T-storms then
    Chance
    T-storms

  • Friday

    Friday: A slight chance of thunderstorms before 7am.  Mostly sunny, with a high near 79. Chance of precipitation is 10%.

    High: 79 °F

    Slight Chance
    T-storms then
    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 62.

    Low: 62 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 77.

    High: 77 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 58.

    Low: 58 °F

    Partly Cloudy

Detailed Forecast

Overnight
Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 61. North wind 3 to 5 mph.
Wednesday
Patchy fog before 8am. Otherwise, mostly sunny, with a high near 77. North northeast wind around 6 mph.
Wednesday Night
Mostly cloudy, then gradually becoming clear, with a low around 57. Light east northeast wind.
Thursday
Sunny, with a high near 78. Calm wind becoming south southwest 5 to 9 mph in the morning.
Thursday Night
A 50 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 63. South wind around 8 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday
A slight chance of thunderstorms before 7am. Mostly sunny, with a high near 79. Chance of precipitation is 10%.
Friday Night
Mostly clear, with a low around 62.
Saturday
Sunny, with a high near 77.
Saturday Night
Partly cloudy, with a low around 58.
Sunday
Mostly sunny, with a high near 73.
Sunday Night
Partly cloudy, with a low around 58.
Monday
Mostly sunny, with a high near 76.
Monday Night
Partly cloudy, with a low around 61.
Tuesday
Mostly sunny, with a high near 79.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
Waverly IA
 42.73°N 92.46°W
11:06 pm CDT Aug 18, 2026
12am CDT Aug 19, 2026-6pm CDT Aug 25, 2026
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database