Hail Swath Map Preview
The Janesville, WI hail swath map preview was last reviewed on August 27, 2026 and shows mapped hail estimates up to 1.00". There are 1 public hail reports, 21 public wind reports, and 0 nearby tornado reports listed for the August 24, 2021 event.
View the August 24, 2021 Janesville, WI hail event on the free interactive hail map, then check a free Hail Report by ZIP to see a more local hail signal for your area.
Impact Area and Population for the Janesville, WI Hail Map
The August 24, 2021 hail swath map for Janesville, WI covers approximately 687 square miles and includes an estimated 143,576 people inside the mapped footprint. The largest mapped area is in the < 0.50" hail band, covering 359 square miles. The highest estimated population exposure is in the < 0.50" hail band with 78,832 people.
| Mapped Hail Band | Impact Area | Population |
|---|---|---|
| < 0.50" | 359 sq mi | 78,832 |
| 0.50-0.75" | 259 sq mi | 50,176 |
| 0.75-1.00" | 61 sq mi | 12,133 |
| 1.00-1.25" | 8 sq mi | 2,435 |
Get a free Hail Report by ZIP to see a more local hail signal and whether the August 24, 2021 Janesville, WI hail event may have reached your area.
Housing Exposure Inside the Janesville, WI Hail Swath Map
Inside the August 24, 2021 hail swath map area for Janesville, WI, HailGeeks estimates 57,391 single-family homes, 6,497 townhomes, and 15,187 multifamily properties within the mapped storm footprint. Single-family-home exposure is highest in the < 0.50" hail band, with 31,979 single-family homes.
| Mapped Hail Band | Single-Family | Townhomes | Multifamily |
|---|---|---|---|
| < 0.50" | 31,979 | 3,461 | 7,682 |
| 0.50-0.75" | 20,602 | 1,985 | 5,097 |
| 0.75-1.00" | 4,056 | 972 | 2,021 |
| 1.00-1.25" | 754 | 79 | 387 |
Use this table to review housing exposure by hail band for the August 24, 2021 Janesville, WI hail map. To check a specific property more closely, use a free Hail Report by Address.
Counties Inside the Janesville, WI Hail Map
Hail from the August 24, 2021 storm was mapped across 23 counties in the Janesville, WI region. Lake County, IL had the strongest mapped signal, peaking at 1.00" with roughly 8,035 single-family homes inside the swath.
County pages group every mapped hail event in the area. For a closer look, drop to the city or ZIP level below, or run a free Hail Report by Address.
Cities Inside the Janesville, WI Hail Map
Zooming in, the swath touched 48 cities near Janesville, WI. Lake Villa, IL had the strongest mapped signal at 1.00", with an estimated 1,610 single-family homes exposed.
City cards show where the August 24, 2021 Janesville, WI hail activity was mapped, but your ZIP can show a closer local signal. Get a free Hail Report by ZIP, and if the signal looks meaningful, ask a local pro about a Remote Hail Inspection to see whether an on-site roof or exterior review may be worth scheduling.
ZIP Codes Inside the Janesville, WI Hail Swath Map
At the ZIP level, the August 24, 2021 Janesville, WI hail map spans 61 ZIP codes. ZIP 60046 shows the strongest local signal, with mapped hail estimates up to 1.00" and an estimated single-family-home exposure of 3,853.
Check your ZIP in seconds to see whether hail activity from the August 24, 2021 Janesville, WI event was mapped near your area.
Public Hail, Wind, and Tornado Reports
Public storm report tables connected to the August 24, 2021 hail map for Janesville, WI currently list 1 public hail reports, 21 public wind reports, and 0 tornado reports.
| Date & Time | Hail Size | City | State | Description |
|---|---|---|---|---|
August 24, 2021 5:20 PM CT |
1.00 in | Elk Grove Village | IL | PUBLIC SHARED PHOTO VIA SOCIAL MEDIA OF HAIL NEAR QUARTER SIZE. TIME ESTIMATED BY RADAR. |
| Date & Time | Wind Speed | City | State | Description |
|---|---|---|---|---|
August 24, 2021 2:04 PM CT | Wauwatosa | WI | SECTION OF A LARGE TREE SNAPPED AND FELL ON HOUSE... MULTIPLE TREE LIMBS DOWN ACROSS TOWN. TIMING ESTIMATED WITH THE GUST FRONT ON RADAR. | |
August 24, 2021 5:10 PM CT | 1 ENE Bloomingdale | IL | SEVERAL REPORTS OF LARGE TREE LIMBS DOWNED IN THE BLOOMINGDALE AREA. TIME ESTIMATED FROM RADAR. | |
August 24, 2021 5:32 PM CT | Lanark | IL | 4 INCH DIAMETER TREE BRANCH DOWN IN TOWN... ANOTHER TREE APPROX 1 FOOT IN DIAMETER SNAPPED NEAR BASE ON E FRANKLIN ST. TIME ESTIMATED FROM RADAR. | |
August 24, 2021 5:53 PM CT | Polo | IL | TREE DOWNED ONTO A HOUSE. TIME ESTIMATED FROM RADAR. | |
August 24, 2021 5:55 PM CT | Oregon | IL | LARGE 3-FT DIAMETER TREE DOWNED AT OGLE COUNTY COURTHOUSE. TIME ESTIMATED BY RADAR. | |
August 24, 2021 5:55 PM CT | 1 NW Oregon | IL | MULTIPLE 12 TO 18 INCH DIAMETER BRANCHES DOWNED IN AND WEST OF OREGON ALONG IL-64. TIME ESTIMATED BY RADAR. | |
August 24, 2021 6:00 PM CT | Byron | IL | MULTIPLE PUBLIC REPORTS OF TREE DAMAGE IN THE VICINITY OF BYRON AND STILLMAN VALLEY. TIME ESTIMATED BY RADAR. | |
August 24, 2021 6:04 PM CT | 3 NNW Stillman Valley | IL | SEVERAL LARGE TREE LIMBS SNAPPED. TIME ESTIMATED FROM RADAR. | |
August 24, 2021 6:05 PM CT | Rockford | IL | PHOTO SHARED TO SOCIAL MEDIA SHOWS SMALL BRANCHES DOWNED NEAR STATE AND KILBURN IN ROCKFORD. TIME ESTIMATED BY RADAR. | |
August 24, 2021 6:08 PM CT | 1 WNW Rockford | IL | SEVERAL TREES AND WIRES DOWNED ON THE WEST SIDE OF ROCKFORD. ONE TREE DOWNED ONTO A HOUSE ON ALBERT AVE. TIME ESTIMATED FROM RADAR. | |
August 24, 2021 6:12 PM CT | 2 SE Rockford | IL | WIRES DOWNED ON THE 1300 BLOCK OF 9TH ST. IN ROCKFORD. TIME ESTIMATED FROM RADAR. | |
August 24, 2021 6:15 PM CT | 3 ENE Rockford Airport | IL | 4-INCH DIAMETER TREE LIMB DOWNED EAST OF SANDY HOLLOW GOLF COURSE IN ROCKFORD. TIME ESTIMATED BY RADAR. | |
August 24, 2021 6:28 PM CT | 1 ENE Rochelle | IL | PUBLIC REPORTS SMALL BRANCHES DOWNED IN ROCHELLE AREA. REPORT RELAYED VIA MPING. | |
August 24, 2021 6:35 PM CT | Kingston | IL | PUBLIC REPORT OF NUMEROUS BRANCHES DOWNED IN KINGSTON. TIME ESTIMATED BY RADAR. | |
August 24, 2021 6:40 PM CT | 1 NW Dekalb | IL | PHOTO SHARED TO SOCIAL MEDIA SHOWS MULTIPLE BRANCHES UP TO 8-IN DIAMETER DOWNED NEAR HILLCREST DRIVE AND BLACKHAWK ROAD IN DEKALB. TIME ESTIMATED BY RADAR. | |
August 24, 2021 6:40 PM CT | 1 W Dekalb | IL | PHOTO SHARED VIA SOCIAL MEDIA SHOWS TREE SNAPPED NEAR THE BASE NEAR NORTHERN ILLINOIS UNIVERSITY IN DEKALB. TIME ESTIMATED BY RADAR. | |
August 24, 2021 6:43 PM CT | Genoa | IL | WIRES DOWNED IN GENOA. TIME ESTIMATED FROM RADAR. | |
August 24, 2021 6:45 PM CT | Sycamore | IL | 2-3 INCH DIAMETER TREE BRANCHES DOWNED IN SYCAMORE. TIME ESTIMATED BY RADAR. | |
August 24, 2021 5:23 PM CT | 60 mph | Lanark | IL | SMALL TREE LIMBS COMING DOWN. |
August 24, 2021 6:10 PM CT | 60 mph | 1 WNW Davis Junction | IL | REPORT OF MEASURED 60 MPH WIND GUST. RELAYED VIA SPOTTERNETWORK. |
August 24, 2021 6:45 PM CT | 68 mph | 2 ENE Dekalb | IL | 68 MPH WIND GUST MEASURED BY HANDHELD ANEMOMETER NEAR DEKALB AIRPORT. TIME ESTIMATED BY RADAR. |
| Date & Time | Rating | City | State | Description |
|---|---|---|---|---|
| No public tornado reports are available for this event. | ||||
This table includes only public storm reports connected to the August 24, 2021 Janesville, WI storm event. When available, each report may include the time, size or magnitude, city, state, and a short description.
Related Hail Maps in the Janesville, WI Region
We found 6 more hail maps with reports from the same Janesville, WI region as the August 24, 2021 event. These related maps cover storm dates from Aug 7, 2021 through Aug 23, 2021, with mapped hail estimates ranging from 0.75" to 1.25". In this set, the strongest related map reached 1.25", and the most recent map shown is from Aug 23, 2021.
If none of these related Janesville, WI hail maps look close enough to your property, check a free Hail Report by Address. It reviews hail history for a specific location — not just the broader Janesville, WI region — so you can check whether hail activity may have reached your property.
Local Hail Review Options Near Janesville, WI
Not sure whether the August 24, 2021 Janesville, WI hail map matters for your property? Start with a free Hail Report by Address to see whether hail activity was mapped for that property. If the property signal looks meaningful, you can choose a local pro serving the Janesville, WI region and ask about a Remote Hail Inspection before deciding whether an on-site roof or exterior review is worth scheduling.
Check a specific property to see whether hail activity from the August 24, 2021 Janesville, WI event — or another recent hail event — may have been mapped at that address.
Find a roof or exterior pro serving the Janesville, WI region who can help you understand what the property hail signal may mean.
A participating local pro reviews property-level hail history remotely — not just the August 24, 2021 event — to help decide whether an on-site inspection may be worth scheduling.
A free Hail Report by Address and a Remote Hail Inspection can help you look beyond the August 24, 2021 hail map visuals alone. They do not confirm property damage and do not replace an on-site inspection for a property in the Janesville, WI region, but they can help you make a more informed next decision before anyone climbs on the roof.
Frequently Asked Questions
Common questions about the August 24, 2021 Janesville, WI hail event.