Severe Weather in the Plains; Heavy Rainfall in the Ohio and Tennessee Valleys; Heat Wave in the Central U.S.

Numerous severe storms with a potential for severe wind gusts, tornadoes (some potentially strong), and very large hail are expected in parts of the central and northern Plains. Heavy rainfall may bring a flooding threat to parts of the northern Plains and from the Ohio Valley to the Southeast. Fire weather concerns persist in the Four Corners Region. Hot and humid expected in the central U.S.. Read More >

Hazardous Weather Conditions

Current conditions at

Illinois Valley Regional Airport (KVYS)

Lat: 41.35°NLon: 89.15°WElev: 650ft.

Mostly Cloudy

86°F

30°C

Humidity 70%
Wind Speed SW 12 mph
Barometer 29.86 in
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Heat Index95°F (35°C)
Last update 9 Jun 5:02 pm CDT
Extended Forecast for

Ottawa IL

  • This Afternoon

    This Afternoon: A 20 percent chance of showers and thunderstorms.  Mostly sunny, with a steady temperature around 85. West southwest wind around 10 mph, with gusts as high as 15 mph.

    High: 85 °F

    Slight Chance
    T-storms

  • Tonight

    Tonight: A 40 percent chance of showers and thunderstorms, mainly before 4am.  Partly cloudy, with a low around 72. West southwest wind around 5 mph becoming south after midnight. Winds could gust as high as 15 mph.

    Low: 72 °F

    Slight Chance
    T-storms then
    Chance
    T-storms

  • Wednesday

    Wednesday: A 50 percent chance of showers and thunderstorms, mainly after 2pm.  Mostly sunny, with a high near 92. Heat index values as high as 101. Breezy, with a south southwest wind 10 to 20 mph, with gusts as high as 30 mph.

    High: 92 °F

    Slight Chance
    T-storms then
    Chance
    T-storms and
    Breezy

  • Wednesday Night

    Wednesday Night: Showers and thunderstorms likely, mainly before 3am.  Mostly cloudy, with a low around 73. Breezy, with a southwest wind 10 to 20 mph, with gusts as high as 30 mph.  Chance of precipitation is 70%.

    Low: 73 °F

    T-storms
    Likely and
    Breezy

  • Thursday

    Thursday: A slight chance of showers before 10am, then a slight chance of showers and thunderstorms between 10am and 1pm, then showers and possibly a thunderstorm after 1pm.  High near 90. Breezy, with a southwest wind 10 to 15 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph.  Chance of precipitation is 80%.

    High: 90 °F

    Slight Chance
    T-storms then
    Showers and
    Breezy

  • Thursday Night

    Thursday Night: Showers and possibly a thunderstorm before 1am.  Low around 62. Breezy.  Chance of precipitation is 80%.

    Low: 62 °F

    Showers and
    Breezy

  • Friday

    Friday: Sunny, with a high near 78.

    High: 78 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 61.

    Low: 61 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 85.

    High: 85 °F

    Sunny

Detailed Forecast

This Afternoon
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a steady temperature around 85. West southwest wind around 10 mph, with gusts as high as 15 mph.
Tonight
A 40 percent chance of showers and thunderstorms, mainly before 4am. Partly cloudy, with a low around 72. West southwest wind around 5 mph becoming south after midnight. Winds could gust as high as 15 mph.
Wednesday
A 50 percent chance of showers and thunderstorms, mainly after 2pm. Mostly sunny, with a high near 92. Heat index values as high as 101. Breezy, with a south southwest wind 10 to 20 mph, with gusts as high as 30 mph.
Wednesday Night
Showers and thunderstorms likely, mainly before 3am. Mostly cloudy, with a low around 73. Breezy, with a southwest wind 10 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 70%.
Thursday
A slight chance of showers before 10am, then a slight chance of showers and thunderstorms between 10am and 1pm, then showers and possibly a thunderstorm after 1pm. High near 90. Breezy, with a southwest wind 10 to 15 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 80%.
Thursday Night
Showers and possibly a thunderstorm before 1am. Low around 62. Breezy. Chance of precipitation is 80%.
Friday
Sunny, with a high near 78.
Friday Night
Clear, with a low around 61.
Saturday
Sunny, with a high near 85.
Saturday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 64.
Sunday
A chance of showers. Partly sunny, with a high near 79.
Sunday Night
A chance of showers. Mostly cloudy, with a low around 58.
Monday
Partly sunny, with a high near 75.
Monday Night
Partly cloudy, with a low around 55.
Tuesday
Mostly sunny, with a high near 76.
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ABOUT THIS FORECAST

 
Point Forecast:
Ottawa IL
 41.33°N 88.82°W
4:56 pm CDT Jun 9, 2026
5pm CDT Jun 9, 2026-6pm CDT Jun 16, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database