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

Hazardous Weather Conditions

Current conditions at

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Fair

34°F

1°C

Humidity 51%
Wind Speed Calm
Barometer 30.44 in
Dewpoint 18°F (-8°C)
Visibility 10.00 mi
Last update 28 Nov 12:50 pm CST
Extended Forecast for

2 Miles WSW Alton IL

Winter Weather Advisory November 29, 12:00am until November 30, 12:00am
Click here for hazard details and duration
Winter Weather Advisory

  • This Afternoon

    This Afternoon: Increasing clouds, with a high near 39. Calm wind becoming southeast around 5 mph.

    High: 39 °F

    Increasing
    Clouds

  • Tonight

    Tonight: Snow, mainly after 2am. Low around 30. Southeast wind 6 to 13 mph, with gusts as high as 24 mph. Chance of precipitation is 100%. New snow accumulation of 1 to 2 inches possible.

    Low: 30 °F

    Slight Chance
    Snow then
    Snow

  • Saturday

    Saturday: Snow, possibly mixed with rain and sleet before noon, then rain, possibly mixed with snow between noon and 4pm, then rain after 4pm. High near 38. Southeast wind 14 to 18 mph, with gusts as high as 33 mph. Chance of precipitation is 100%. New snow and sleet accumulation of 1 to 3 inches possible.

    High: 38 °F

    Wintry Mix

  • Saturday Night

    Saturday Night: A 50 percent chance of rain before 9pm. Cloudy, with a low around 25. Breezy, with a south wind 15 to 20 mph becoming northwest after midnight. Winds could gust as high as 33 mph.

    Low: 25 °F

    Breezy.
    Chance Rain
    then Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 30. Northwest wind 10 to 16 mph, with gusts as high as 25 mph.

    High: 30 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 15.

    Low: 15 °F

    Mostly Cloudy

  • Monday

    Monday: A 20 percent chance of snow after noon. Mostly cloudy, with a high near 28.

    High: 28 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • Monday Night

    Monday Night: A 40 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 18.

    Low: 18 °F

    Chance Snow

  • Tuesday

    Tuesday: Partly sunny, with a high near 31.

    High: 31 °F

    Partly Sunny

Detailed Forecast

This Afternoon
Increasing clouds, with a high near 39. Calm wind becoming southeast around 5 mph.
Tonight
Snow, mainly after 2am. Low around 30. Southeast wind 6 to 13 mph, with gusts as high as 24 mph. Chance of precipitation is 100%. New snow accumulation of 1 to 2 inches possible.
Saturday
Snow, possibly mixed with rain and sleet before noon, then rain, possibly mixed with snow between noon and 4pm, then rain after 4pm. High near 38. Southeast wind 14 to 18 mph, with gusts as high as 33 mph. Chance of precipitation is 100%. New snow and sleet accumulation of 1 to 3 inches possible.
Saturday Night
A 50 percent chance of rain before 9pm. Cloudy, with a low around 25. Breezy, with a south wind 15 to 20 mph becoming northwest after midnight. Winds could gust as high as 33 mph.
Sunday
Mostly cloudy, with a high near 30. Northwest wind 10 to 16 mph, with gusts as high as 25 mph.
Sunday Night
Mostly cloudy, with a low around 15.
Monday
A 20 percent chance of snow after noon. Mostly cloudy, with a high near 28.
Monday Night
A 40 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 18.
Tuesday
Partly sunny, with a high near 31.
Tuesday Night
Partly cloudy, with a low around 20.
Wednesday
Partly sunny, with a high near 39.
Wednesday Night
Mostly cloudy, with a low around 22.
Thursday
Partly sunny, with a high near 32.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles WSW Alton IL
 38.88°N 90.19°W (Elev. 407 ft)
Last Update:
11:06 am CST Nov 28, 2025
Forecast Valid:
1pm CST Nov 28, 2025-6pm CST Dec 4, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation