Severe Thunderstorms and Flooding from the Southern Plains to the Great Lakes; Record Heat in the East

Widely scattered severe thunderstorms may produce damaging winds, hail, and flash flooding from the southern Plains into the lower Great Lakes. Elevated to locally critical fire weather conditions will persist across portions of the Southwest and Southern High Plains due to gusty winds and dry conditions. An early-season heatwave will challenge temperature records across the eastern U.S.. Read More >

Current conditions at

Fort Madison Municipal Airport (KFSW)

Lat: 40.66°NLon: 91.33°WElev: 719ft.

Overcast

59°F

15°C

Humidity 72%
Wind Speed W 12 mph
Barometer 30.12 in
Dewpoint 50°F (10°C)
Visibility 10.00 mi
Last update 19 May 6:15 pm CDT
Extended Forecast for

2 Miles WSW Pontoosuc IL

  • Tonight

    Tonight: Mostly cloudy, with a low around 49. North wind around 10 mph, with gusts as high as 20 mph.

    Low: 49 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 64. Northeast wind around 10 mph, with gusts as high as 20 mph.

    High: 64 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 47. Northeast wind 5 to 10 mph.

    Low: 47 °F

    Partly Cloudy

  • Thursday

    Thursday: A 20 percent chance of showers after 1pm.  Partly sunny, with a high near 66. East wind around 10 mph, with gusts as high as 20 mph.

    High: 66 °F

    Partly Sunny
    then Slight
    Chance
    Showers

  • Thursday Night

    Thursday Night: A 50 percent chance of showers after 1am.  Cloudy, with a low around 52.

    Low: 52 °F

    Mostly Cloudy
    then Chance
    Showers

  • Friday

    Friday: Showers likely.  Mostly cloudy, with a high near 63. Chance of precipitation is 70%. New precipitation amounts between a half and three quarters of an inch possible.

    High: 63 °F

    Showers
    Likely

  • Friday Night

    Friday Night: A 30 percent chance of showers before 1am.  Mostly cloudy, with a low around 53.

    Low: 53 °F

    Chance
    Showers

  • Saturday

    Saturday: Partly sunny, with a high near 71.

    High: 71 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 55.

    Low: 55 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 49. North wind around 10 mph, with gusts as high as 20 mph.
Wednesday
Mostly sunny, with a high near 64. Northeast wind around 10 mph, with gusts as high as 20 mph.
Wednesday Night
Partly cloudy, with a low around 47. Northeast wind 5 to 10 mph.
Thursday
A 20 percent chance of showers after 1pm. Partly sunny, with a high near 66. East wind around 10 mph, with gusts as high as 20 mph.
Thursday Night
A 50 percent chance of showers after 1am. Cloudy, with a low around 52.
Friday
Showers likely. Mostly cloudy, with a high near 63. Chance of precipitation is 70%. New precipitation amounts between a half and three quarters of an inch possible.
Friday Night
A 30 percent chance of showers before 1am. Mostly cloudy, with a low around 53.
Saturday
Partly sunny, with a high near 71.
Saturday Night
Mostly cloudy, with a low around 55.
Sunday
Partly sunny, with a high near 76.
Sunday Night
Partly cloudy, with a low around 57.
Memorial Day
Partly sunny, with a high near 78.
Monday Night
Mostly cloudy, with a low around 60.
Tuesday
Partly sunny, with a high near 80.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles WSW Pontoosuc IL
 40.61°N 91.24°W (Elev. 653 ft)
3:26 pm CDT May 19, 2026
6pm CDT May 19, 2026-6pm CDT May 26, 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