Heavy Rainfall and Severe Thunderstorm Threats; Heat Risk Expands; Monitoring the Tropics

Flash flooding risks continue for portions of the Four Corners and Great Basin through today. Severe thunderstorms are outlooked from the eastern Great Lakes, southern New England into the mid-Atlantic through Tuesday. Heat risk increases and expands across the center of the nation and across the Ohio Valley and mid-Atlantic this week. Continue to closely monitor tropical development in the Gulf. Read More >

Hazardous Weather Conditions

Current conditions at

Sterling Rockfalls (KSQI)

Lat: 41.74°NLon: 89.67°WElev: 643ft.

Overcast

75°F

24°C

Humidity 69%
Wind Speed Vrbl 3 mph
Barometer 29.92 in (1012.7 mb)
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Last update 31 Aug 5:56 am CDT
Extended Forecast for

4 Miles NNE Nelson IL

  • Today

    Today: A 30 percent chance of showers and thunderstorms, mainly after 3pm.  Partly sunny, with a high near 88. Heat index values as high as 95. Southwest wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 88 °F

    Chance
    T-storms

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms before 10pm.  Partly cloudy, with a low around 72. South southwest wind around 5 mph, with gusts as high as 10 mph.

    Low: 72 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of showers and thunderstorms before 1pm.  Mostly sunny, with a high near 90. Heat index values as high as 99. Southwest wind 5 to 10 mph.

    High: 90 °F

    Slight Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 72. South southwest wind around 5 mph, with gusts as high as 10 mph.

    Low: 72 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 91. South southwest wind 5 to 15 mph, with gusts as high as 25 mph.

    High: 91 °F

    Sunny

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers and thunderstorms after 1am.  Partly cloudy, with a low around 71.

    Low: 71 °F

    Mostly Clear
    then Slight
    Chance
    T-storms

  • Thursday

    Thursday: A 30 percent chance of showers and thunderstorms before 1pm.  Mostly sunny, with a high near 87.

    High: 87 °F

    Chance
    T-storms

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 70.

    Low: 70 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 88.

    High: 88 °F

    Mostly Sunny

Detailed Forecast

Today
A 30 percent chance of showers and thunderstorms, mainly after 3pm. Partly sunny, with a high near 88. Heat index values as high as 95. Southwest wind 10 to 15 mph, with gusts as high as 20 mph.
Tonight
A 20 percent chance of showers and thunderstorms before 10pm. Partly cloudy, with a low around 72. South southwest wind around 5 mph, with gusts as high as 10 mph.
Tuesday
A 20 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 90. Heat index values as high as 99. Southwest wind 5 to 10 mph.
Tuesday Night
Mostly clear, with a low around 72. South southwest wind around 5 mph, with gusts as high as 10 mph.
Wednesday
Sunny, with a high near 91. South southwest wind 5 to 15 mph, with gusts as high as 25 mph.
Wednesday Night
A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 71.
Thursday
A 30 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 87.
Thursday Night
Partly cloudy, with a low around 70.
Friday
Mostly sunny, with a high near 88.
Friday Night
Mostly clear, with a low around 68.
Saturday
Mostly sunny, with a high near 87.
Saturday Night
Mostly clear, with a low around 66.
Sunday
Mostly sunny, with a high near 85.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles NNE Nelson IL
 41.86°N 89.58°W
4:06 am CDT Aug 31, 2026
7am CDT Aug 31, 2026-6pm CDT Sep 6, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database