Weather Arlington Heights 7:45 PM Friday, July 11 2025 with approaching storms during a Tornado Watch (CARDINAL NEWS). YouTube Tips ⓘ
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TORNADO WATCH in effect until 11:00 p.m. for …
BOONE, DE KALB, LA SALLE, LEE COUNTIES
and in Northeast Illinois …
COOK, DUPAGE, GRUNDY, KANE, KENDALL, LAKE IL, MCHENRY, and WILL COUNTIES
Level 2 to 3 of 5 severe thunderstorm threat late Friday afternoon and evening.
Heavy rainfall will accompany the storms and could result in flash flooding, particularly in the areas in and around Rockford that were hit with very heavy rainfall last night.
Showers and thunderstorms are possible again Saturday afternoon and evening, though the severe threat and coverage of storms should be lower than those expected this evening.
Wind is already from the north. At present, it seems like the main limiting factor for a more widespread/significant severe threat across northeast Illinois relates to the orientation of the deep-layer shear, which is forecast to remain more northeasterly. With this shear roughly paralleling the main arcing QLCS (Quasi-Linear Convective System, which is a term for a line of thunderstorms arranged in a linear or squall line formation), outflow has had a tendency to outpace stronger thunderstorm cell cores, limiting the longevity and intensity of thunderstorm wind gusts.
Going forward, suspect that the main severe threat will remain tied to deeper cores which can sustain and move northeast, atop the eastward-surging outflow. At present, the deepest/strongest cores are developing into Marshall, Putnam, and eastern Bureau counties, and the NWS will be watching these for signs of intensification as they continue northeast into La Salle and De Kalb counties through 8-830 PM.
Main severe threat remains from locally strong to damaging wind gusts with any northeast-oriented surging bowing segments. Brief QLCS tornado spin-ups also remain a possibility, but cores will need to intensify a bit beyond where they are currently, and also keep pace with, or remain ahead of the outflow.
Thunderstorms will likely arrive in most of Arlington Heights by 9:10 p.m.
Weather Radarat shows precipitation consistent and moving from southwest to northeast at 7:45 p.m. and later on Friday night, Friday, July 11, 2025.
See also Arlingtoncardinal.com/clouds
@NIUwxcams catching the shelf move across @NIUlive this evening. We'll take the rain! @NWSChicago pic.twitter.com/6sVSQEff4f
— Walker Ashley (@WalkerSAshley) July 12, 2025
O’HARE FORECAST …
Friday Night: Showers and thunderstorms before midnight, then showers likely and possibly a thunderstorm between midnight and 1am, then a chance of showers and thunderstorms after 1am. Some of the storms could be severe. Low around 72. South southeast wind 5 to 10 mph becoming west in the evening. Winds could gust as high as 15 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday: A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 86. Southwest wind around 10 mph, with gusts as high as 20 mph.
Saturday Night: Partly cloudy, with a low around 67. West northwest wind 5 to 10 mph.
Sunday: Mostly sunny, with a high near 84. West wind around 5 mph, with gusts as high as 15 mph.
Sunday Night: Mostly clear, with a low around 67. West wind around 5 mph becoming calm in the evening.
Monday: Sunny, with a high near 89.
Monday Night: Mostly clear, with a low around 72.
Tuesday: A chance of showers after 1pm. Partly sunny, with a high near 90.
Tuesday Night: A chance of showers. Mostly cloudy, with a low around 72.
Wednesday: A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 87.
Wednesday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 68.
Thursday: A chance of showers and thunderstorms. Partly sunny, with a high near 82.
Thursday Night: Mostly cloudy, with a low around 66.
Friday: Partly sunny, with a high near 79.
U.S. HIGH AND LOW TEMPERATURE
(for the contiguous United States)
NWS Weather Prediction Center, College Park, MD
Issued 8 pm EDT Friday, July 11, 2025
High Temperature for Friday, July 11, 2025
(as received by 8 pm EDT July 11)
121 at Stovepipe Wells, CA
Low Temperature for Friday, July 11, 2025
(as received by 8 pm EDT July 11)
25 at Peter Sinks, UT
POLLEN COUNT …
LOYOLA MEDICINE ALLERGY COUNT
x.com/LoyolaAllergy
Loyola Medicine Allergy Count for 7-11-2025
Trees – Low
Grass – High
Ragweed – Absent
Weeds – Low
Mold – High
LAKE TEMPS …
SOUTHERN LAKE MICHIGAN WATER TEMPERATURES
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
921 AM CDT Fri Jul 11 2025
LAKE MICHIGAN WATER TEMPERATURES…
CHICAGO SHORE………..71.
CHICAGO CRIB…………67.
CHICAGO BUOY…………72.
WILMETTE BUOY………..72.
WAUKEGAN BUOY………..71.
WINTHROP HARBOR BUOY….69.
MICHIGAN CITY………..63.
MICHIGAN CITY BUOY……72.
SOUTH MID LAKE BUOY…..71.
CENTRAL MID LAKE BUOY…65.
NORTH MID LAKE BUOY…..63.
&&
M IS FOR MISSING DATA THAT IS NORMALLY AVAILABLE.
THE MICHIGAN CITY WATER TEMPERATURE SENSOR IS LOCATED AT
A WATER INTAKE ONE MILE OFFSHORE AND 60 FEET BELOW THE
WATER SURFACE. IT IS READ EVERY DAY OF THE YEAR.
march.chicagoweatherstation.com
Chicago Weather Forecast for your MAC/PC/TABLET includes surrounding suburbs.
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