Widespread Showers in the Eastern US; Severe Thunderstorms in the Plains; Heatwave in the Desert Southwest

Widespread showers and thunderstorms across much of the central and eastern U.S. will produce areas of excessive rainfall, especially in the southern Mid-Atlantic states. Scattered severe thunderstorms are expected from Montana into portions of the central/southern Plains this weekend. A heatwave will build in the Desert Southwest, in parts of Arizona, southeastern California, and southern Nevada. Read More >

Hazardous Weather Conditions

Current conditions at

Ankeny Regional Airport (KIKV)

Lat: 41.69°NLon: 93.57°WElev: 886ft.

A Few Clouds

81°F

27°C

Humidity 79%
Wind Speed SE 7 mph
Barometer 30.03 in
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index86°F (30°C)
Last update 15 Jun 2:35 pm CDT
Extended Forecast for

Johnston IA

  • This Afternoon

    This Afternoon: A 30 percent chance of showers and thunderstorms, mainly after 4pm.  Mostly cloudy, with a high near 85. Southeast wind around 6 mph.  New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 85 °F

    Chance
    T-storms

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly before 1am.  Mostly cloudy, with a low around 66. Southeast wind around 5 mph becoming light and variable  in the evening.  New rainfall amounts between a quarter and half of an inch possible.

    Low: 66 °F

    Chance
    T-storms

  • Monday

    Monday: Mostly sunny, with a high near 88. Light southeast wind becoming south 5 to 9 mph in the morning.

    High: 88 °F

    Mostly Sunny

  • Monday Night

    Monday Night: A 40 percent chance of showers and thunderstorms.  Partly cloudy, with a low around 69. South wind 6 to 9 mph.

    Low: 69 °F

    Chance
    T-storms

  • Tuesday

    Tuesday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm.  Partly sunny, with a high near 85. West southwest wind 6 to 8 mph becoming south in the afternoon.  Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    High: 85 °F

    Chance
    T-storms then
    Showers
    Likely

  • Tuesday Night

    Tuesday Night: Showers and possibly a thunderstorm.  Low around 66. Chance of precipitation is 90%. New rainfall amounts between 1 and 2 inches possible.

    Low: 66 °F

    T-storms then
    Showers

  • Wednesday

    Wednesday: A 40 percent chance of showers and thunderstorms.  Partly sunny, with a high near 81.

    High: 81 °F

    Chance
    Showers then
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 61.

    Low: 61 °F

    Mostly Clear

  • Juneteenth

    Juneteenth: Sunny, with a high near 85.

    High: 85 °F

    Sunny

Detailed Forecast

This Afternoon
A 30 percent chance of showers and thunderstorms, mainly after 4pm. Mostly cloudy, with a high near 85. Southeast wind around 6 mph. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tonight
A 30 percent chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 66. Southeast wind around 5 mph becoming light and variable in the evening. New rainfall amounts between a quarter and half of an inch possible.
Monday
Mostly sunny, with a high near 88. Light southeast wind becoming south 5 to 9 mph in the morning.
Monday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 69. South wind 6 to 9 mph.
Tuesday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 85. West southwest wind 6 to 8 mph becoming south in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday Night
Showers and possibly a thunderstorm. Low around 66. Chance of precipitation is 90%. New rainfall amounts between 1 and 2 inches possible.
Wednesday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 81.
Wednesday Night
Mostly clear, with a low around 61.
Juneteenth
Sunny, with a high near 85.
Thursday Night
Mostly clear, with a low around 66.
Friday
Sunny, with a high near 89. Breezy.
Friday Night
Mostly clear, with a low around 75.
Saturday
Sunny, with a high near 93. Breezy.
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ABOUT THIS FORECAST

 
Point Forecast:
Johnston IA
 41.69°N 93.71°W
2:54 pm CDT Jun 15, 2025
2pm CDT Jun 15, 2025-6pm CDT Jun 21, 2025
 
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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