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Severe Thunderstorms With Heavy Rain Possible In The Upper Midwest; Excessive Heat For Central U.S.

Several rounds of strong to severe thunderstorms will be possible from the northern Plains and upper Midwest to the Great Lakes through Friday. Damaging winds, large hail, and flooding will be the primary threats with these storms. Excessive heat will grip the central Plains with heat indices approaching 105 to 110 degrees. Very hot and humid conditions are likely to expand into the Mid Atlantic. Read More >

Current conditions at

Lewis University Airport (KLOT)

Lat: 41.6°NLon: 88.1°WElev: 669ft.

Mostly Cloudy

83°F

28°C

Humidity 70%
Wind Speed W 13 G 18 mph
Barometer 29.97 in
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index88°F (31°C)
Last update 20 Jul 3:15 pm CDT
Extended Forecast for

Romeoville IL

Flash Flood Watch July 21, 04:00pm until July 22, 09:00am
Click here for hazard details and duration
Flash Flood Watch
  • This
    Afternoon

    This Afternoon: A 40 percent chance of showers and thunderstorms, mainly after 4pm.  Partly sunny, with a high near 88. Heat index values as high as 100. Northwest wind around 10 mph.

    Chance
    T-storms

    High: 88 °F

  • Tonight

    Tonight: A chance of showers and thunderstorms before 9pm, then a slight chance of showers and thunderstorms after 11pm.  Patchy fog after 1am.  Otherwise, mostly cloudy, with a low around 72. North wind 5 to 10 mph becoming east after midnight.  Chance of precipitation is 30%.

    Chance
    T-storms and
    Patchy Fog

    Low: 72 °F

  • Friday

    Friday: A 50 percent chance of showers and thunderstorms, mainly after 10am.  Patchy fog before 8am.  Otherwise, mostly cloudy, with a high near 89. Heat index values as high as 98. East northeast wind 5 to 10 mph becoming south southeast in the afternoon.

    Chance
    T-storms and
    Patchy Fog

    High: 89 °F

  • Friday
    Night

    Friday Night: Showers and thunderstorms likely, mainly after 1am.  Mostly cloudy, with a low around 73. Southeast wind 5 to 10 mph.  Chance of precipitation is 60%.

    T-storms
    Likely

    Low: 73 °F

  • Saturday

    Saturday: A 50 percent chance of showers and thunderstorms, mainly before 1pm.  Mostly cloudy, with a high near 89. Southwest wind 5 to 10 mph.

    Chance
    T-storms

    High: 89 °F

  • Saturday
    Night

    Saturday Night: A 20 percent chance of showers and thunderstorms.  Partly cloudy, with a low around 71.

    Slight Chance
    T-storms

    Low: 71 °F

  • Sunday

    Sunday: A 20 percent chance of showers and thunderstorms after 1pm.  Mostly sunny, with a high near 86.

    Mostly Sunny
    then Slight
    Chance
    T-storms

    High: 86 °F

  • Sunday
    Night

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

    Partly Cloudy

    Low: 65 °F

  • Monday

    Monday: Mostly sunny, with a high near 79.

    Mostly Sunny

    High: 79 °F

Detailed Forecast

This Afternoon
A 40 percent chance of showers and thunderstorms, mainly after 4pm. Partly sunny, with a high near 88. Heat index values as high as 100. Northwest wind around 10 mph.
Tonight
A chance of showers and thunderstorms before 9pm, then a slight chance of showers and thunderstorms after 11pm. Patchy fog after 1am. Otherwise, mostly cloudy, with a low around 72. North wind 5 to 10 mph becoming east after midnight. Chance of precipitation is 30%.
Friday
A 50 percent chance of showers and thunderstorms, mainly after 10am. Patchy fog before 8am. Otherwise, mostly cloudy, with a high near 89. Heat index values as high as 98. East northeast wind 5 to 10 mph becoming south southeast in the afternoon.
Friday Night
Showers and thunderstorms likely, mainly after 1am. Mostly cloudy, with a low around 73. Southeast wind 5 to 10 mph. Chance of precipitation is 60%.
Saturday
A 50 percent chance of showers and thunderstorms, mainly before 1pm. Mostly cloudy, with a high near 89. Southwest wind 5 to 10 mph.
Saturday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 71.
Sunday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 86.
Sunday Night
Partly cloudy, with a low around 65.
Monday
Mostly sunny, with a high near 79.
Monday Night
Mostly clear, with a low around 61.
Tuesday
Sunny, with a high near 82.
Tuesday Night
Mostly clear, with a low around 62.
Wednesday
Sunny, with a high near 83.
Click Map For Forecast
Point Forecast:
Romeoville IL
 41.65°N 88.07°W
2:17 pm CDT Jul 20, 2017
3pm CDT Jul 20, 2017-6pm CDT Jul 26, 2017
 
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