Heavy Rainfall and Severe Thunderstorm Threats; Heat Risk Expands; Monitoring the Tropics

Flash flooding risks continue for portions of the Four Corners and Great Basin through today. Severe thunderstorms are outlooked from the eastern Great Lakes, southern New England into the mid-Atlantic through Tuesday. Heat risk increases and expands across the center of the nation and across the Ohio Valley and mid-Atlantic this week. Continue to closely monitor tropical development in the Gulf. Read More >

Hazardous Weather Conditions

Hazardous Weather Outlook

Current conditions at

Lewis University Airport (KLOT)

Lat: 41.6°NLon: 88.1°WElev: 669ft.

Mostly Cloudy

72°F

22°C

Humidity	100%
Wind Speed	S 3 mph
Barometer	29.99 in
Dewpoint	72°F (22°C)
Visibility	10.00 mi
Last update	31 Aug 7:45 am CDT

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

Romeoville IL

Today
High: 87 °F
Chance
T-storms then
Mostly Sunny
Tonight
Low: 73 °F
Slight Chance
T-storms then
Partly Cloudy
Tuesday
High: 90 °F
Slight Chance
T-storms
Tuesday Night
Low: 73 °F
Mostly Clear
Wednesday
High: 91 °F
Sunny
Wednesday Night
Low: 72 °F
Partly Cloudy
then Slight
Chance
T-storms
Thursday
High: 87 °F
Chance
T-storms
Thursday Night
Low: 71 °F
Partly Cloudy
Friday
High: 87 °F
Mostly Sunny

Detailed Forecast

Today

A 30 percent chance of showers and thunderstorms, mainly before 9am. Partly sunny, with a high near 87. South southwest wind 10 to 15 mph, with gusts as high as 20 mph.

Tonight

A 20 percent chance of showers and thunderstorms before 10pm. Partly cloudy, with a low around 73. South southwest wind 5 to 10 mph.

Tuesday

A slight chance of showers and thunderstorms between 10am and 1pm. Mostly sunny, with a high near 90. Heat index values as high as 99. Southwest wind 5 to 10 mph, with gusts as high as 15 mph. Chance of precipitation is 20%.

Tuesday Night

Mostly clear, with a low around 73. South southwest wind around 5 mph.

Wednesday

Sunny, with a high near 91. Southwest wind 5 to 15 mph, with gusts as high as 25 mph.

Wednesday Night

A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 72.

Thursday

A 30 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 87.

Thursday Night

Partly cloudy, with a low around 71.

Friday

Mostly sunny, with a high near 87.