Severe Weather and Heavy Rainfall from the Midwest to the Ohio Valley; Mid-Summer Heat Continues

Severe thunderstorm and heavy rainfall threats will persist from the Midwest to Lower Great Lakes through Monday, shifting into the Ohio Valley and Central Appalachians Monday evening into Tuesday. Mid-summer heat will continue across much of the CONUS this week, with record highs possible well into the 100s across the south-central High Plains. Read More >

Hazardous Weather Conditions

Current conditions at

Tri-Township Airport (KSFY)

Lat: 42.05°NLon: 90.11°WElev: 614ft.

Fair

69°F

21°C

Humidity 94%
Wind Speed N 3 mph
Barometer 29.88 in
Dewpoint 67°F (19°C)
Visibility 10.00 mi
Last update 10 Aug 4:15 am CDT
Extended Forecast for

Savanna IL

  • Today

    Today: A 30 percent chance of showers and thunderstorms, mainly after 2pm.  Patchy fog before 8am.  Otherwise, partly sunny, with a high near 85. Calm wind becoming east around 5 mph in the morning.

    High: 85 °F

    Chance
    T-storms and
    Patchy Fog

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms before 5am.  Patchy fog after 5am.  Otherwise, mostly cloudy, with a low around 69. East wind around 5 mph.

    Low: 69 °F

    Slight Chance
    T-storms and
    Patchy Fog

  • Tuesday

    Tuesday: A 50 percent chance of showers and thunderstorms, mainly between 7am and 1pm.  Patchy fog before 8am.  Otherwise, mostly cloudy, with a high near 85. East wind around 5 mph becoming southwest in the afternoon.  New rainfall amounts between a quarter and half of an inch possible.

    High: 85 °F

    Chance
    T-storms and
    Patchy Fog

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms before 4am, then a slight chance of showers.  Partly cloudy, with a low around 68. Calm wind.  Chance of precipitation is 40%.

    Low: 68 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: A 30 percent chance of showers before 1pm.  Partly sunny, with a high near 86.

    High: 86 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 67.

    Low: 67 °F

    Partly Cloudy

  • Thursday

    Thursday: A chance of showers, then showers likely and possibly a thunderstorm after 1pm.  Mostly cloudy, with a high near 79. Chance of precipitation is 60%.

    High: 79 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: A 40 percent chance of showers.  Mostly cloudy, with a low around 61.

    Low: 61 °F

    Chance
    Showers

  • Friday

    Friday: A 40 percent chance of showers and thunderstorms.  Mostly cloudy, with a high near 77.

    High: 77 °F

    Chance
    T-storms

Detailed Forecast

Today
A 30 percent chance of showers and thunderstorms, mainly after 2pm. Patchy fog before 8am. Otherwise, partly sunny, with a high near 85. Calm wind becoming east around 5 mph in the morning.
Tonight
A 20 percent chance of showers and thunderstorms before 5am. Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 69. East wind around 5 mph.
Tuesday
A 50 percent chance of showers and thunderstorms, mainly between 7am and 1pm. Patchy fog before 8am. Otherwise, mostly cloudy, with a high near 85. East wind around 5 mph becoming southwest in the afternoon. New rainfall amounts between a quarter and half of an inch possible.
Tuesday Night
A chance of showers and thunderstorms before 4am, then a slight chance of showers. Partly cloudy, with a low around 68. Calm wind. Chance of precipitation is 40%.
Wednesday
A 30 percent chance of showers before 1pm. Partly sunny, with a high near 86.
Wednesday Night
Partly cloudy, with a low around 67.
Thursday
A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 79. Chance of precipitation is 60%.
Thursday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 61.
Friday
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 77.
Friday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 61.
Saturday
A 40 percent chance of showers. Mostly cloudy, with a high near 78.
Saturday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 64.
Sunday
Partly sunny, with a high near 78.
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ABOUT THIS FORECAST

 
Point Forecast:
Savanna IL
 42.09°N 90.13°W (Elev. 623 ft)
3:26 am CDT Aug 10, 2026
4am CDT Aug 10, 2026-6pm CDT Aug 16, 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