NOAA weather radar detected hail over 30 of the 1000 US cities we track on this date, across 7 states (AL, FL, IL, KS, MI, MO, WI) — 128 radar detections in total. The most active was Buffalo Grove, IL with 16.
Check a specific address for this date →These dates are GMT, not local. GMT runs 5–8 hours ahead of the US, so a storm that hit at 8:30 PM local on one evening is recorded here under the following date. Evening storms are the norm across the Plains and the Southeast. If you are writing a date of loss on a claim form, check the local time — being one day off is a real reason a carrier can push back.
| City | Radar detections |
|---|---|
| Buffalo Grove, IL | 16 |
| Mount Prospect, IL | 15 |
| Wheeling, IL | 15 |
| Crystal Lake, IL | 8 |
| Glenview, IL | 7 |
| Arlington Heights, IL | 6 |
| Palatine, IL | 6 |
| Bartlett, IL | 5 |
| Streamwood, IL | 5 |
| Beloit, WI | 4 |
| Tampa, FL | 4 |
| Evanston, IL | 3 |
| Hoffman Estates, IL | 3 |
| Independence, MO | 3 |
| Kalamazoo, MI | 3 |
| Kansas City, KS | 3 |
| Kansas City, MO | 3 |
| Olathe, KS | 3 |
| Skokie, IL | 3 |
| Muskegon, MI | 2 |
| Winter Garden, FL | 2 |
| Belleville, IL | 1 |
| Carpentersville, IL | 1 |
| Chicago, IL | 1 |
| Hanover Park, IL | 1 |
| Hoover, AL | 1 |
| Moline, IL | 1 |
| Park Ridge, IL | 1 |
| Pontiac, MI | 1 |
| Schaumburg, IL | 1 |
These are city-centre tiles. To see whether radar registered hail over your street on August 20, 2011 — and every other date going back to 1992 — run the free address lookup. No signup, no account, and you can download the result as a CSV.
Look up your address →What a detection means. Counts describe a 0.1° grid tile — roughly 7 miles north to south — containing the city, not a specific address. A detection inside the tile does not prove hail fell on any particular roof, and no detection does not prove none fell. This is a screening tool, not an insurance claim, a loss report, or an engineering inspection.
NOAA NCEI Severe Weather Data Inventory,
dataset nx3hail — NEXRAD Level-III Hail Detection Algorithm output. Public-domain US
government data.
All storm dates · All cities · Hail history by address
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