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

Severe Thunderstorms and Flash Flooding in the Central U.S.; A Dangerous Heatwave Coming to the West

A slow moving cold front will bring multiple rounds of widespread heavy rain, localized flash flooding, and severe thunderstorms from the central Plains into the Great Lakes through Saturday. A dangerous heatwave with record breaking and triple digit temperatures is expected this weekend into next week over the Northwest U.S. Excessive Heat Watches and Warnings have been issued. Read More >

Hazardous Weather Conditions

Current conditions at

De Kalb Taylor Municipal Airport (KDKB)

Lat: 41.93°NLon: 88.71°WElev: 909ft.

Overcast

70°F

21°C

Humidity 100%
Wind Speed W 15 G 18 mph
Barometer 29.87 in
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Last update 25 Jun 8:55 am CDT
Extended Forecast for

Dekalb IL

Flash Flood Watch until June 26, 07:00am
Click here for hazard details and duration
Flash Flood Watch
  •  
    Flash Flood Watch until June 26, 07:00am

    NOW until
    7:00am Sat

    Flash Flood Watch

  • Today

    Today: Showers and thunderstorms likely, mainly before 10am. Some of the storms could produce heavy rain. Mostly cloudy, with a high near 79. South southeast wind 5 to 15 mph becoming northwest in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 60%. New rainfall amounts between a half and three quarters of an inch possible.

    Heavy Rain

    High: 79 °F

  • Tonight

    Tonight: Showers and thunderstorms, mainly after 11pm. Low around 69. South wind 5 to 10 mph, with gusts as high as 15 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    T-storms

    Low: 69 °F

  • Saturday

    Saturday: Showers and thunderstorms. High near 83. South southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    T-storms

    High: 83 °F

  • Saturday
    Night

    Saturday Night: Showers and thunderstorms, mainly before 2am. Low around 68. South southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%.

    T-storms

    Low: 68 °F

  • Sunday

    Sunday: Showers and thunderstorms likely, mainly after 2pm. Mostly cloudy, with a high near 81. Southwest wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.

    T-storms
    Likely

    High: 81 °F

  • Sunday
    Night

    Sunday Night: Showers and thunderstorms likely, mainly before 8pm. Mostly cloudy, with a low around 65. Chance of precipitation is 60%.

    T-storms
    Likely

    Low: 65 °F

  • Monday

    Monday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 80. Chance of precipitation is 60%.

    Chance
    T-storms then
    Showers
    Likely

    High: 80 °F

  • Monday
    Night

    Monday Night: Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms after 8pm. Mostly cloudy, with a low around 66.

    Showers
    Likely then
    Chance
    T-storms

    Low: 66 °F

Detailed Forecast

Today
Showers and thunderstorms likely, mainly before 10am. Some of the storms could produce heavy rain. Mostly cloudy, with a high near 79. South southeast wind 5 to 15 mph becoming northwest in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 60%. New rainfall amounts between a half and three quarters of an inch possible.
Tonight
Showers and thunderstorms, mainly after 11pm. Low around 69. South wind 5 to 10 mph, with gusts as high as 15 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Saturday
Showers and thunderstorms. High near 83. South southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Saturday Night
Showers and thunderstorms, mainly before 2am. Low around 68. South southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%.
Sunday
Showers and thunderstorms likely, mainly after 2pm. Mostly cloudy, with a high near 81. Southwest wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.
Sunday Night
Showers and thunderstorms likely, mainly before 8pm. Mostly cloudy, with a low around 65. Chance of precipitation is 60%.
Monday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 80. Chance of precipitation is 60%.
Monday Night
Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms after 8pm. Mostly cloudy, with a low around 66.
Tuesday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 80.
Tuesday Night
A chance of showers and thunderstorms, mainly after 2am. Mostly cloudy, with a low around 65.
Wednesday
A chance of showers and thunderstorms. Partly sunny, with a high near 79.
Wednesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 62.
Thursday
A chance of showers and thunderstorms. Partly sunny, with a high near 78.
Click Map For Forecast
Disclaimer
Map Legend
Point Forecast:
Dekalb IL
 41.9°N 88.76°W
Last Update:
8:15 am CDT Jun 25, 2021
Forecast Valid:
9am CDT Jun 25, 2021-6pm CDT Jul 1, 2021
 
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