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

Severe Weather and Excessive Rain from the Southern Plains into the Mississippi Valley

Severe thunderstorms may produce tornadoes, some strong, damaging wind gusts above 70 mph, and very large hail exceeding 2 inches in diameter, and intense rainfall that may cause flash flooding tonight across much of the southern Plains and lower Missouri Valley. The severe thunderstorms and excessive rainfall will expand from east Texas into the Mississippi Valley on Sunday. Read More >

Hazardous Weather Conditions

Current conditions at

Sioux County Regional Airport (KSXK)

Lat: 42.99°NLon: 96.16°WElev: 1409ft.

Overcast

50°F

10°C

Humidity 100%
Wind Speed NE 15 mph
Barometer 29.85 in
Dewpoint 50°F (10°C)
Visibility 10.00 mi
Wind Chill45°F (7°C)
Last update 28 Apr 12:55 am CDT
Extended Forecast for

Alton IA

  • Overnight

    Overnight: A 40 percent chance of showers and thunderstorms. Cloudy, with a low around 47. Northeast wind around 15 mph, with gusts as high as 30 mph.

    Chance
    Showers

    Low: 47 °F

  • Sunday

    Sunday: Showers likely, then showers and possibly a thunderstorm after 10am. High near 57. Breezy, with an east northeast wind 10 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

    Showers and
    Breezy

    High: 57 °F

  • Sunday
    Night

    Sunday Night: Showers and thunderstorms likely before 4am, then a slight chance of showers. Cloudy, with a low around 41. North wind 10 to 15 mph becoming west after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Showers
    Likely then
    Chance
    T-storms

    Low: 41 °F

  • Monday

    Monday: Mostly cloudy, with a high near 58. West wind around 15 mph, with gusts as high as 25 mph.

    Mostly Cloudy

    High: 58 °F

  • Monday
    Night

    Monday Night: Mostly clear, with a low around 42. West wind 5 to 10 mph becoming southeast after midnight.

    Mostly Clear

    Low: 42 °F

  • Tuesday

    Tuesday: A chance of showers before 10am, then a chance of showers and thunderstorms between 10am and 1pm, then showers likely and possibly a thunderstorm after 1pm. Mostly sunny, with a high near 72. Breezy, with a south southeast wind 15 to 20 mph becoming west in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 70%.

    Breezy.
    Chance
    Showers then
    Showers
    Likely

    High: 72 °F

  • Tuesday
    Night

    Tuesday Night: A 30 percent chance of showers after 1am. Mostly clear, with a low around 43.

    Mostly Clear
    then Chance
    Showers

    Low: 43 °F

  • Wednesday

    Wednesday: A 30 percent chance of showers after 1pm. Partly sunny, with a high near 70.

    Mostly Sunny
    then Chance
    Showers

    High: 70 °F

  • Wednesday
    Night

    Wednesday Night: A 40 percent chance of showers. Mostly cloudy, with a low around 47.

    Chance
    Showers

    Low: 47 °F

Detailed Forecast

Overnight
A 40 percent chance of showers and thunderstorms. Cloudy, with a low around 47. Northeast wind around 15 mph, with gusts as high as 30 mph.
Sunday
Showers likely, then showers and possibly a thunderstorm after 10am. High near 57. Breezy, with an east northeast wind 10 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Sunday Night
Showers and thunderstorms likely before 4am, then a slight chance of showers. Cloudy, with a low around 41. North wind 10 to 15 mph becoming west after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Monday
Mostly cloudy, with a high near 58. West wind around 15 mph, with gusts as high as 25 mph.
Monday Night
Mostly clear, with a low around 42. West wind 5 to 10 mph becoming southeast after midnight.
Tuesday
A chance of showers before 10am, then a chance of showers and thunderstorms between 10am and 1pm, then showers likely and possibly a thunderstorm after 1pm. Mostly sunny, with a high near 72. Breezy, with a south southeast wind 15 to 20 mph becoming west in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 70%.
Tuesday Night
A 30 percent chance of showers after 1am. Mostly clear, with a low around 43.
Wednesday
A 30 percent chance of showers after 1pm. Partly sunny, with a high near 70.
Wednesday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 47.
Thursday
A 40 percent chance of showers. Partly sunny, with a high near 65. Breezy.
Thursday Night
A 30 percent chance of showers. Partly cloudy, with a low around 42.
Friday
Mostly sunny, with a high near 62.
Friday Night
A 40 percent chance of showers. Partly cloudy, with a low around 41.
Saturday
A 40 percent chance of showers. Partly sunny, with a high near 63.
Click Map For Forecast
Disclaimer
Map Legend
Point Forecast:
Alton IA
 42.98°N 96.01°W (Elev. 1283 ft)
Last Update:
10:33 pm CDT Apr 27, 2024
Forecast Valid:
1am CDT Apr 28, 2024-6pm CDT May 4, 2024
 
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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