CHICAGOLAND DETAILS …
Severe thunderstorm cells were indicated by radar mostly south of Arlington Heights, and caused the activation of a Severe Thunderstorm Warning Thursday night.
Otherwise radar indicates precipitation as a line of moderate thunderstorms moving west to east with storm cells within the line moving southwest to northeast. The most intense lightning appeared to pass south of Arlington Heights.
Severe Thunderstorm Warning … 944 PM CDT, a severe thunderstorm was located over Hanover Park, moving east at 30 mph …60 mph wind gusts …Radar indicated …Expect damage to roofs, siding, and trees. This storm would mostly affect southern parts of Arlington Heights … NWS locations affected as Arlington Heights, Schaumburg, Des Plaines, Mount Prospect, Wheaton, Hoffman Estates, Glenview, Elmhurst, Lombard, Bartlett, Ohare Airport, Streamwood, Carol Stream, Hanover Park, Wheeling, Park Ridge, Addison, Glendale Heights, Elk Grove Village, Glen Ellyn, West Chicago, Melrose Park, Franklin Park, Rolling Meadows, and Roselle.
The thunderstorm line that caused the closure of Thursday night’s Frontier Days and the Drone Show developed suddenly about 7:30 p.m. as a line just west of DeKalb, Crystal Lake, and Kenosha. A second line developed just ahead of the first line beginning in St Charles about 8:00 p.m., and then formed the second line consisting of storm cells in St. Charles, Schaumburg, Arlington Heights, Glenview, and Evanston by 8:30 p.m.
A moderate thundershower peaked in Arlington Heights from about 9:00 p.m. to 9:30 p.m., causing the cancellation of the Village of Arlington Heights drone show scheduled at 9:35 p.m. Then a Severe Thunderstorm Warming that included Arlington Heights was activated at 9:44 p.m.
See also: LIVE STREAMS: Arlingtoncardinal.com/StormChasers
Temperature Outlook …
F 75 92 | SA 72 85 | SU 68 84 | M 66 82
O’HARE FORECAST …
Extreme Heat Warning … EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL MIDNIGHT CDT TONIGHT… (has not expired early as of 9:30 p.m. although the temperature in Arlington Heights dropped to 74°F by 9:30 PM).
Thursday Night: A chance of showers and thunderstorms before 1am, then showers likely and possibly a thunderstorm between 1am and 2am, then a chance of showers and thunderstorms after 2am. Mostly cloudy, with a low around 75. South southwest wind 5 to 10 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday: Showers and thunderstorms likely, mainly after 3pm. Partly sunny, with a high near 92. Heat index values as high as 99. Southwest wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday Night: Showers and thunderstorms likely, mainly before 1am, then showers likely and possibly a thunderstorm after 4am. Mostly cloudy, with a low around 72. Southwest wind 5 to 10 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Independence Day (Saturday): Showers likely and possibly a thunderstorm before 10am, then a chance of showers and thunderstorms between 10am and 1pm, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 85. West wind 5 to 10 mph becoming east in the afternoon. Chance of precipitation is 60%.
Saturday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 68. East southeast wind 5 to 10 mph becoming west northwest after midnight. Chance of precipitation is 60%.
Sunday: A 40 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 84.
Sunday Night: A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 66.
Monday: Mostly sunny, with a high near 82.
Monday Night: Partly cloudy, with a low around 66.
Tuesday: Mostly sunny, with a high near 86.
Tuesday Night: Partly cloudy, with a low around 67.
Wednesday: Mostly sunny, with a high near 88.
Wednesday Night: Partly cloudy, with a low around 68.
RADAR • Clouds • Temps • NWS CHGO • UV
O’Hare Weather Forecast Compared to Phoenix, Miami, LA, Wash DC THU JUL 02, 2026 9:29 PM SOURCE: National Weather Service local offices.
