No Rain Near Arlington Heights and O’Hare, But Some Thunderstorms in West and Southwest Chicagoland

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Weather forecast for Thursday, April 11, 2024. YouTube Tips ⓘ

Rain did not fall Wednesday, except for some very fine misting or a short passing light shower in Arlington Heights and northwest Cook County … with maybe .02 inch of rain around noon.

However, a line of showers and embedded storms moved across portions of north and northwest Illinois (west of Cook County) late afternoon through sunset. The strongest storms were capable of producing gusty winds, small hail, and occasional lightning. There has also been the potential for funnel clouds with these showers and storms west of Cook County.

An isolated thunderstorm or two are possible through midnight or a little later than midnight — mainly west, southwest and south of Chicago.

Weather Radar shows bands of light precipitation and embedded thunderstorm west of a line from Rockford to Kankakee moving in a counterclockwise motion associated with a low pressure system and moving slowly eastward at 9:15 p.m.

See also

Loyola Medicine Allergy Count for 4-11-2024
Trees – High – Primary Cypress
Grass – Low
Ragweed – Absent
Weeds – Absent
Mold – Low


Thursday: A 20 percent chance of rain before 1pm. Cloudy, with a high near 56. North wind around 15 mph, with gusts as high as 25 mph.

Thursday Night: Showers likely, mainly between 3am and 4am. Cloudy, with a low around 45. Breezy, with a northwest wind 10 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

Friday: Scattered showers before 7am. Cloudy through mid morning, then gradual clearing, with a high near 59. Windy, with a northwest wind 25 to 30 mph, with gusts as high as 45 mph. Chance of precipitation is 30%.

Friday Night: Mostly clear, with a low around 43. Breezy, with a west northwest wind 15 to 20 mph decreasing to 10 to 15 mph after midnight. Winds could gust as high as 30 mph.

Saturday: Sunny, with a high near 69. West wind 5 to 10 mph becoming south southwest in the afternoon. Winds could gust as high as 15 mph.

Saturday Night: A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 57.

Sunday: Sunny, with a high near 78.

Sunday Night: Mostly clear, with a low around 49.

Monday: Mostly sunny, with a high near 73.

Monday Night: A chance of showers, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 60.

Tuesday: Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 75. Breezy.

Tuesday Night: A chance of showers. Partly cloudy, with a low around 58. Breezy.

Wednesday: A chance of showers. Mostly sunny, with a high near 75.


939 AM CDT Thu Apr 11 2024






Chicago Weather Forecast for your MAC/PC/TABLET includes surrounding suburbs.



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Area Forecast Discussion
National Weather Service Chicago/Romeoville, IL
1228 PM CDT Thu Apr 11 2024


– Rain will continue through early afternoon generally along- east of I-57.

– Showers develop near/west of I-39 this afternoon and expand across the area into this evening and overnight. A few thunderstorms will also be possible (30% chance) mainly along/near I-39.

– Strong northwest winds, gusting over 40 mph at times, are expected late tonight into Friday afternoon.

– Unseasonably mild weather this weekend into early next week.


.UPDATE… Issued at 1130 AM CDT Thu Apr 11 2024

Overall the forecast remains on track with the morning update. Only changes made were to clean up PoP timing trends through this evening and nudge up the thunderstorm chances to 30% along and near the I-39 corridor.

Rain continues across areas generally along/east of I-57 and across Chicago late this morning. The back edge of this rain will gradually shift east with time through early afternoon. Meanwhile a narrow ribbon of showers has since developed late this morning currently extending from the Keweenaw peninsula of Michigan south to the Quad Cities. This axis will gradually shift east and expand in coverage southward this afternoon focused initially along the I-39 corridor, likely enhanced initially by the first of a pair of mid-level vorts in eastern Iowa as it moves toward the area. The band of showers and embedded thunderstorms will then shift east with time into early evening with thunderstorm potential diminishing as showers develop areawide overnight. The trailing wave, currently in southeast South Dakota will support showers persisting through early Friday morning.

Also worth mentioning that we will be monitoring closely for the potential for funnel clouds along this narrow band of showers this afternoon into early evening. If the surface convergence and low-level instability axis aligns a bit better than currently expected these funnels may be able to briefly reach the ground.

– Petr/NWS

Area Forecast Discussion
National Weather Service Chicago/Romeoville, IL
841 PM CDT Thu Apr 11 2024


– An isolated thunderstorm or two possible through midnight or so mainly west/south of Chicago.

– Strong northwest winds develop Friday morning through the afternoon.

– Unseasonably warm this weekend into early next week.

– There is a potential for strong to severe thunderstorms to occur in the region on Tuesday.


.UPDATE… Issued at 841 PM CDT Thu Apr 11 2024

Regional radars depicted an area of showers arcing from near Freeport, through Morris and Danville as of 815 pm. These showers were generally focused within an area of low-level convergence along a surface trough which was moving slowly to the east-southeast in association with a mid-level trough. Isolated to widely-scattered thunderstorms had occurred within this line earlier this evening across our west/southwestern cwa, though the loss of weak (<200 J/kg) surface-based instability with sunset has resulted in a significant decrease in lightning, with the only current lightning detected well south of the cwa along/east the IL/IN border near Terre Haute IN. While little additional thunder is expected, can`t completely rule out an isolated thunderstorm west/south of Chicago through about midnight however, as mid-level lapse rates slowly steepen beneath the mid-level cold pool (near -8C at H7) associated with the upper trough. Showers should eventually end from northwest to southeast approaching the pre-dawn hours, with a few showers lingering in northwest IN early Friday morning. Cloud cover should decrease from the west especially in the afternoon, as the upper trough continues to shift to the east and strong subsidence eventually develops across the forecast area in it`s wake late in the day. Otherwise, northwest winds will increase as the surface trough moves east overnight (and the primary deep surface low to our east continues to deepen) into Friday, with gusts near 30 mph at times by sunrise. Winds should really pick up after sunrise however, as mixing deepens the boundary layer and taps into 40-45 kt flow aloft. This should support surface gusts 35-45 mph by mid-morning, just below wind advisory criteria. Winds may ease slightly in the afternoon, though it will likely remain windy through sunset. Did make some adjustments to hourly pops through the evening based on radar depiction/areal coverage of precip. Also adjusted temps were precip as cooled things a little faster than previously forecast, and decreased winds a bit prior to midnight across the eastern cwa, east of the surface trough. Going forecast generally captures the big picture well however, and no other significant changes made at this time. - Ratzer/NWS

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