Hail in Chicago on Tuesday, August 27, 2024
The Storm Prediction Center logged 10 hail reports in Chicago on Tuesday, August 27, 2024, between 5:13 pm and 7:38 pm CDT, in 3 of the metro's 7 counties. The largest was 2.50 inches at 2 S Woodstock (McHenry County) at 5:29 pm. NOAA radar flagged 1,641 hail signatures inside the metro that day: 561 rated a 100% chance of hail and 529 with a maximum expected size of 1 inch or more.
Where hail was reported
Reports came from 8 places in Cook, Lake and McHenry counties, named as the National Weather Service described them.
- Woodstock 3 reports, up to 2.50 in
- Hawthorn Woods 1 report, up to 1.00 in
- Indian Creek 1 report, up to 1.00 in
- Lake Zurich 1 report, up to 1.25 in
- Marengo 1 report, up to 1.75 in
- McHenry 1 report, up to 1.00 in
- Mount Prospect 1 report, up to 1.00 in
- Vernon Hills 1 report, up to 1.00 in
Every hail report logged that day
Times are Central Daylight Time. Sizes are in inches, as reported. The comment is the National Weather Service's text as published in the Storm Prediction Center's daily log.
| Time | Size | Place | County | NWS comment |
|---|---|---|---|---|
| 5:13 pm | 1.75 | 4 N Marengo | McHenry | Based on public photo on social media. (LOT) |
| 5:20 pm | 1.00 | 3 NW Woodstock | McHenry | Near the intersection of Rt 14 and Rose Farm Road in Woodstock. Relayed by county EMA. (LOT) |
| 5:29 pm | 2.50 | 2 S Woodstock | McHenry | A video received via social media shows hail up to 2.5 inches in diameter approximately 2 miles south of Woodstock. (LOT) |
| 5:29 pm | 1.75 | 1 SSW Woodstock | McHenry | Near Rt 14 and Dean Street... relayed by county EMA. (LOT) |
| 6:09 pm | 1.00 | 1 W McHenry | McHenry | Relayed via mping. (LOT) |
| 6:24 pm | 1.00 | 1 SSE Indian Creek | Lake | Corrects previous hail report time from 1 SSE Indian Creek. Photos shared on social media of hail at least 1 in diameter. In addition... the hail caused damage to roofs (LOT) |
| 6:25 pm | 1.00 | Vernon Hills | Lake | Relayed via mping. (LOT) |
| 6:30 pm | 1.25 | Lake Zurich | Lake | Video shared on social media showed half dollar size hail falling with strong winds. In addition... there were reports of tree branches down blocking lanes of traffic. (LOT) |
| 6:42 pm | 1.00 | 2 N Hawthorn Woods | Lake | Relayed via mping. (LOT) |
| 7:38 pm | 1.00 | 1 SE Mount Prospect | Cook | Relayed via mping. Time estimated by radar. (LOT) |
What NEXRAD radar recorded inside the metro
1,641 signatures from 10 radars fell inside the metro's counties on this local date, counting every cell the algorithm rated from a 10% to a 100% chance of hail; 561 were rated 100% and 47 had a maximum expected size of 2 inches or more.
| Radar | Signatures | Rated 100% | 1 in or more | 2 in or more | Largest expected | First | Last |
|---|---|---|---|---|---|---|---|
| KMDW | 399 | 95 | 112 | 4 | 2.00 in | 6:12 pm | 10:51 pm |
| KORD | 276 | 23 | 32 | 6 | 2.50 in | 4:57 pm | 11:56 pm |
| KMKX | 193 | 82 | 66 | 6 | 3.25 in | 4:45 pm | 10:47 pm |
| KLOT | 166 | 72 | 73 | 7 | 2.75 in | 4:49 pm | 10:29 pm |
| KIWX | 153 | 76 | 52 | 0 | 1.50 in | 6:11 pm | 10:45 pm |
| KDVN | 145 | 79 | 75 | 18 | 3.00 in | 4:49 pm | 10:50 pm |
| KILX | 118 | 43 | 37 | 1 | 2.00 in | 6:41 pm | 10:50 pm |
| KMKE | 93 | 50 | 51 | 4 | 2.75 in | 4:48 pm | 7:51 pm |
| KGRR | 64 | 39 | 30 | 1 | 2.00 in | 6:06 pm | 9:00 pm |
| KIND | 34 | 2 | 1 | 0 | 1.00 in | 8:32 pm | 10:24 pm |
Each radar that scans a storm writes its own signature about every 4 to 6 minutes, so one storm produces many rows and overlapping radars count it more than once. The raw rows for this day are in NOAA's Severe Weather Data Inventory.
Check an address for August 27, 2024
See, free, how many hail signatures NOAA recorded within 1, 3 and 5 miles of one address that day and the nearest spotter report. The full report is $19.
Spotter reports come from the Storm Prediction Center's preliminary daily logs, grouped here by local calendar date (Central Daylight Time) and by county: a report counts for Chicago when its coordinates fall inside one of the metro's 7 counties (Cook, DuPage, Kane, Lake, McHenry, Will and Kendall counties). Radar signatures are estimates from the Hail Detection Algorithm, not measured stones; they include every cell it rated, from a 10% to a 100% probability of hail. How these pages are built.