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

Dangerous Heat Building in the South; Severe Storms From Plains To MS Valley

Intensifying high pressure is producing dangerous heat and humidity in the south-central U.S. with heat indexes possibly exceeding 110. Triple digit heat will also continue for some western areas. Elsewhere, a front moving through the central U.S. may produce severe thunderstorms and heavy rainfall in parts of the Plains and MS Valley through Friday. Read More >

Hazardous Weather Conditions

Current conditions at

Lewis University Airport (KLOT)

Lat: 41.6°NLon: 88.1°WElev: 669ft.

Overcast

74°F

23°C

Humidity 75%
Wind Speed S 13 mph
Barometer 29.77 in
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Last update 19 Jul 11:55 pm CDT
Extended Forecast for

Romeoville IL

  • Overnight

    Overnight: Showers and thunderstorms likely, mainly after 2am. Cloudy, with a low around 68. South wind 10 to 15 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    T-storms
    Likely

    Low: 68 °F

  • Friday

    Friday: Showers and thunderstorms likely before 11am, then showers and possibly a thunderstorm between 11am and 1pm, then showers and thunderstorms after 1pm. High near 76. South wind around 15 mph becoming west southwest in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    Showers then
    T-storms

    High: 76 °F

  • Friday
    Night

    Friday Night: A chance of showers and thunderstorms. Cloudy, with a low around 65. West northwest wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 50%.

    Chance
    Showers

    Low: 65 °F

  • Saturday

    Saturday: A chance of showers, with thunderstorms also possible after 1pm. Cloudy, with a high near 76. West northwest wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 50%.

    Chance
    Showers then
    Chance
    T-storms

    High: 76 °F

  • Saturday
    Night

    Saturday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 66. North northwest wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 40%.

    Chance
    Showers

    Low: 66 °F

  • Sunday

    Sunday: A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 79. Chance of precipitation is 40%.

    Chance
    Showers

    High: 79 °F

  • Sunday
    Night

    Sunday Night: Partly cloudy, with a low around 65.

    Partly Cloudy

    Low: 65 °F

  • Monday

    Monday: Sunny, with a high near 83.

    Sunny

    High: 83 °F

  • Monday
    Night

    Monday Night: Mostly clear, with a low around 65.

    Mostly Clear

    Low: 65 °F

Detailed Forecast

Overnight
Showers and thunderstorms likely, mainly after 2am. Cloudy, with a low around 68. South wind 10 to 15 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday
Showers and thunderstorms likely before 11am, then showers and possibly a thunderstorm between 11am and 1pm, then showers and thunderstorms after 1pm. High near 76. South wind around 15 mph becoming west southwest in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Friday Night
A chance of showers and thunderstorms. Cloudy, with a low around 65. West northwest wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 50%.
Saturday
A chance of showers, with thunderstorms also possible after 1pm. Cloudy, with a high near 76. West northwest wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 50%.
Saturday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 66. North northwest wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 40%.
Sunday
A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 79. Chance of precipitation is 40%.
Sunday Night
Partly cloudy, with a low around 65.
Monday
Sunny, with a high near 83.
Monday Night
Mostly clear, with a low around 65.
Tuesday
Sunny, with a high near 86.
Tuesday Night
Partly cloudy, with a low around 66.
Wednesday
Mostly sunny, with a high near 85.
Wednesday Night
Partly cloudy, with a low around 63.
Thursday
Sunny, with a high near 81.
Click Map For Forecast
Disclaimer
Map Legend
Point Forecast:
Romeoville IL
 41.63°N 88.1°W
Last Update:
11:17 pm CDT Jul 19, 2018
Forecast Valid:
12am CDT Jul 20, 2018-6pm CDT Jul 25, 2018
 
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