Chicago Weather Forecast (O'Hare Official) 5:17 pm CDT Sep 11, 2017 with Forecast Discussion

Tonight: Partly cloudy, with a low around 56. East wind 5 to 10 mph becoming light northeast in the evening.

Tuesday: Mostly sunny, with a high near 78. Northeast wind 5 to 10 mph increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.

Tuesday Night: Mostly clear, with a low around 59. Northeast wind 5 to 10 mph.

Wednesday: A 30 percent chance of showers, mainly between 8am and 2pm. Partly sunny, with a high near 73. East wind around 5 mph.

Wednesday Night: A 20 percent chance of showers before 8pm. Partly cloudy, with a low around 58. East wind around 5 mph becoming calm in the evening.

Thursday: Mostly sunny, with a high near 76.

Thursday Night: Mostly clear, with a low around 59.

Friday: Sunny, with a high near 80.

Friday Night: Mostly clear, with a low around 63.

Saturday: Sunny, with a high near 82.

Saturday Night: A slight chance of showers and thunderstorms. Partly cloudy, with a low around 65.

Sunday: A chance of showers and thunderstorms. Partly sunny, with a high near 81.

Sunday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 60.

Monday: A chance of showers and thunderstorms. Mostly sunny, with a high near 76.

 Amf Ohare IL  41.98°N 87.9°W

Area Forecast Discussion below ad ...

National Weather Service Chicago/Romeoville, IL
GO Current Forecast Discussion


606 PM CDT Mon Sep 11 2017


Through Tuesday...

No significant weather is expected through the period. Temperatures both this afternoon and on Tuesday will remain seasonal, with highs mainly in the 70s. While the area will remain precipitation free, expect high clouds to continue to stream over the region as the remnants of Irma shifts north-northwestward across Georgia.




Tuesday night through Monday...

Stretch of fall like weather will through midweek with a warming trend expected late in the week into the weekend. Rain still appears possible Wednesday as the remnants of Hurricane Irma approach the region, and additional precip chances arrive over the weekend.

Tuesday night into Wednesday, no significant changes to the forecast as the remnants of the hurricane are still expected to lift across the Tennessee Valley Tuesday and retrograde across the mid Mississippi Valley Tuesday night into Wednesday, filling as it does so. Guidance continues to indicate upper level wave will lift into portions of the Midwest late Tuesday into Wednesday transporting a corridor of high PWat air, initially 1.75-2.00 inches, but diminishing as it continues north. Poor mid level lapse rates will not result in any appreciable instability so mainly expect a few waves of rain showers to lift across the area throughout the day with a negligible thunder threat.

Thursday through the weekend, upper low will become absorbed in the westerly flow aloft and exit the region allowing upper ridging to build back over the local area. This will result in a few additional days of dry weather along with a warming trend with temperatures pushing to slightly above normal Friday through the weekend. Expect afternoon highs to be back around or into the 80s for most of the CWA. Models have been advertising, with still some modest timing differences, a cold front pushing across the region at some point Sunday into Monday which could produce showers and thunderstorms.



.AVIATION... For the 00Z TAFs...

High pressure over the area tonight will weaken and inch northward on Tuesday, with the remnants of Hurricane Irma helping to gradually tighten the pressure gradient. As such the east- northeast winds on Tuesday afternoon will be slightly stronger, with sporadic afternoon gusts of 15-17 kt possible.




High pressure is centered over the eastern Great Lakes this afternoon and is expected to shift to the New England coast by Tuesday, but ridging will continue to spread west across the Great Lakes through midweek. A weak cold front is moving across Ontario today which is resulting in a modest uptick in south to southwest flow into the 15 to 20 kt range across the north half of the lake today and early tonight. Through the remainder of the week,  high pressure will dominate the region resulting in lighter flow and rather benign weather.




+ + + + + +

Important links below ad ...
NWS Forecast Chicago (O'Hare)
(NEXRAD Radar Chicago)
(Chicagoland Weather Radar)
(Satellite Cloud Cover East United States)
(US Weather Forecast Chart)
Ultraviolet Index/UV Index
Chicagoland Sunrise, Sunset and Solar Information for Chicago area
Chicagoland Moonrise, Moonset and Lunar Phase information for Chicago area

Full climate/weather details
(Desktop Mac/PC links)

Chicago record high temperatures

Chicago record low temperatures

Chicago extreme records

Chicago normal temperatures

Chicago Weather Radar

Chicago Weather Forecast

See also ...
Arlington Heights Weather Forecast
Chicago allergy weather
Chicago arthritis weather
Chicago respiratory weather

Much of the information in, Chicago Weather Stations and Chicago Weather Station consists of material from the National Weather Service, which is in the public domain (See ABOUT section).