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

Heavy Rainfall Threat Continues in the Southwest on Monday; Record Warmth in the Plains and Midwest

Remnant moisture from Tropical Storm Rachel will persist over portions of the Great Basin and Southwest on Monday, bringing a potential heavy to excessive rainfall risk. Well above average and potentially record breaking temperatures will develop across the Plains and Midwest early this week, spreading into the Lower Mississippi Valley and Southeast midweek. Read More >

Hazardous Weather Conditions

Current conditions at

Tri-Township Airport (KSFY)

Lat: 42.05°NLon: 90.11°WElev: 614ft.

Fair

77°F

25°C

Humidity 64%
Wind Speed SW 13 G 18 mph
Barometer 29.74 in
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 12 Oct 11:55 pm CDT
Extended Forecast for

6 Miles NNW Lanark IL

  • Overnight

    Overnight: Clear, with a low around 66. Southwest wind around 10 mph, with gusts as high as 20 mph.

    Low: 66 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 75. West wind around 5 mph.

    High: 75 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Showers and thunderstorms before 4am, then a slight chance of showers between 4am and 5am. Low around 58. Calm wind becoming north around 5 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 58 °F

    Showers

  • Wednesday

    Wednesday: A slight chance of showers between 7am and 1pm. Mostly cloudy, with a high near 70. North wind 5 to 10 mph. Chance of precipitation is 20%.

    High: 70 °F

    Slight Chance
    Showers

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 51.

    Low: 51 °F

    Mostly Cloudy

  • Thursday

    Thursday: Showers. High near 64. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    High: 64 °F

    Showers

  • Thursday Night

    Thursday Night: A 40 percent chance of showers before 1am. Mostly cloudy, with a low around 45.

    Low: 45 °F

    Chance
    Showers

  • Friday

    Friday: Mostly sunny, with a high near 57. Breezy.

    High: 57 °F

    Mostly Sunny
    and Breezy

  • Friday Night

    Friday Night: Mostly clear, with a low around 32.

    Low: 32 °F

    Mostly Clear

Detailed Forecast

Overnight
Clear, with a low around 66. Southwest wind around 10 mph, with gusts as high as 20 mph.
Tuesday
Sunny, with a high near 75. West wind around 5 mph.
Tuesday Night
Showers and thunderstorms before 4am, then a slight chance of showers between 4am and 5am. Low around 58. Calm wind becoming north around 5 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday
A slight chance of showers between 7am and 1pm. Mostly cloudy, with a high near 70. North wind 5 to 10 mph. Chance of precipitation is 20%.
Wednesday Night
Mostly cloudy, with a low around 51.
Thursday
Showers. High near 64. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Thursday Night
A 40 percent chance of showers before 1am. Mostly cloudy, with a low around 45.
Friday
Mostly sunny, with a high near 57. Breezy.
Friday Night
Mostly clear, with a low around 32.
Saturday
Sunny, with a high near 57.
Saturday Night
Mostly clear, with a low around 38.
Sunday
Sunny, with a high near 62.
Sunday Night
Partly cloudy, with a low around 45.
Monday
Mostly sunny, with a high near 67.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
6 Miles NNW Lanark IL
 42.17°N 89.89°W (Elev. 830 ft)
Last Update:
11:36 pm CDT Oct 12, 2026
Forecast Valid:
12am CDT Oct 13, 2026-6pm CDT Oct 19, 2026
 
Forecast Discussion
 
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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