NWS St. Louis Announces Changes To May 16, 2025 Tornado Damage Assessment

After a year-long review of new ground survey data and aerial imagery, NWS St. Louis made several adjustments to the May 16, 2025 tornado damage assessment. Read More >

Hazardous Weather Conditions

Current conditions at

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Fair

82°F

28°C

Humidity 45%
Wind Speed S 13 G 22 mph
Barometer 29.84 in
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Heat Index82°F (28°C)
Last update 15 May 3:50 pm CDT
Extended Forecast for

Pontoon Beach IL

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly after 5am.  Cloudy, then gradually becoming partly cloudy, with a low around 67. South wind 8 to 13 mph, with gusts as high as 21 mph.

    Low: 67 °F

    Mostly Cloudy
    then Chance
    T-storms

  • Saturday

    Saturday: Showers and thunderstorms likely, mainly between 7am and noon.  Mostly cloudy, with a high near 83. West wind 6 to 9 mph becoming south in the afternoon.  Chance of precipitation is 70%.

    High: 83 °F

    T-storms
    Likely

  • Saturday Night

    Saturday Night: A 20 percent chance of showers and thunderstorms before midnight.  Mostly cloudy, then gradually becoming mostly clear, with a low around 65. South wind around 8 mph.

    Low: 65 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 90. Breezy, with a south wind 10 to 20 mph, with gusts as high as 28 mph.

    High: 90 °F

    Sunny then
    Sunny and
    Breezy

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 70. South wind 13 to 16 mph, with gusts as high as 24 mph.

    Low: 70 °F

    Mostly Clear

  • Monday

    Monday: A 50 percent chance of showers and thunderstorms after 1pm.  Partly sunny, with a high near 91. Breezy.

    High: 91 °F

    Breezy.
    Mostly Sunny
    then Chance
    T-storms

  • Monday Night

    Monday Night: A 50 percent chance of showers and thunderstorms.  Partly cloudy, with a low around 71. Breezy.

    Low: 71 °F

    Chance
    T-storms and
    Breezy

  • Tuesday

    Tuesday: Showers and possibly a thunderstorm.  High near 82. Chance of precipitation is 80%.

    High: 82 °F

    Showers
    Likely then
    T-storms

  • Tuesday Night

    Tuesday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am.  Mostly cloudy, with a low around 61. Chance of precipitation is 70%.

    Low: 61 °F

    Showers
    Likely

Detailed Forecast

Tonight
A 30 percent chance of showers and thunderstorms, mainly after 5am. Cloudy, then gradually becoming partly cloudy, with a low around 67. South wind 8 to 13 mph, with gusts as high as 21 mph.
Saturday
Showers and thunderstorms likely, mainly between 7am and noon. Mostly cloudy, with a high near 83. West wind 6 to 9 mph becoming south in the afternoon. Chance of precipitation is 70%.
Saturday Night
A 20 percent chance of showers and thunderstorms before midnight. Mostly cloudy, then gradually becoming mostly clear, with a low around 65. South wind around 8 mph.
Sunday
Sunny, with a high near 90. Breezy, with a south wind 10 to 20 mph, with gusts as high as 28 mph.
Sunday Night
Mostly clear, with a low around 70. South wind 13 to 16 mph, with gusts as high as 24 mph.
Monday
A 50 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 91. Breezy.
Monday Night
A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 71. Breezy.
Tuesday
Showers and possibly a thunderstorm. High near 82. Chance of precipitation is 80%.
Tuesday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 61. Chance of precipitation is 70%.
Wednesday
A 20 percent chance of showers. Partly sunny, with a high near 72.
Wednesday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 55.
Thursday
Mostly sunny, with a high near 74.
Thursday Night
A 20 percent chance of showers. Partly cloudy, with a low around 56.
Friday
A 20 percent chance of showers. Mostly sunny, with a high near 80.
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ABOUT THIS FORECAST

 
Point Forecast:
Pontoon Beach IL
 38.73°N 90.06°W (Elev. 423 ft)
1:25 pm CDT May 15, 2026
3pm CDT May 15, 2026-6pm CDT May 22, 2026
 
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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