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 1.25". There are 0 public hail reports, 47 public wind reports, and 0 nearby tornado reports listed for the August 10, 2021 event.
View the August 10, 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 10, 2021 hail swath map for Janesville, WI covers approximately 1,543 square miles and includes an estimated 357,679 people inside the mapped footprint. The largest mapped area is in the < 0.50" hail band, covering 726 square miles. The highest estimated population exposure is in the 0.50-0.75" hail band with 167,672 people.
| Mapped Hail Band | Impact Area | Population |
|---|---|---|
| < 0.50" | 726 sq mi | 143,423 |
| 0.50-0.75" | 628 sq mi | 167,672 |
| 0.75-1.00" | 165 sq mi | 43,267 |
| 1.00-1.25" | 22 sq mi | 3,136 |
| 1.25-1.50" | 2 sq mi | 181 |
Get a free Hail Report by ZIP to see a more local hail signal and whether the August 10, 2021 Janesville, WI hail event may have reached your area.
Housing Exposure Inside the Janesville, WI Hail Swath Map
Inside the August 10, 2021 hail swath map area for Janesville, WI, HailGeeks estimates 140,632 single-family homes, 22,706 townhomes, and 27,947 multifamily properties within the mapped storm footprint. Single-family-home exposure is highest in the 0.50-0.75" hail band, with 64,516 single-family homes.
| Mapped Hail Band | Single-Family | Townhomes | Multifamily |
|---|---|---|---|
| < 0.50" | 57,416 | 8,075 | 13,906 |
| 0.50-0.75" | 64,516 | 11,861 | 11,771 |
| 0.75-1.00" | 17,489 | 2,420 | 2,201 |
| 1.00-1.25" | 1,139 | 334 | 64 |
| 1.25-1.50" | 72 | 16 | 5 |
Use this table to review housing exposure by hail band for the August 10, 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 10, 2021 storm was mapped across 26 counties in the Janesville, WI region. McHenry County, IL had the strongest mapped signal, peaking at 1.25" with roughly 32,435 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 68 cities near Janesville, WI. Hampshire, IL had the strongest mapped signal at 1.00", with an estimated 1,643 single-family homes exposed.
City cards show where the August 10, 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 10, 2021 Janesville, WI hail map spans 98 ZIP codes. ZIP 60140 shows the strongest local signal, with mapped hail estimates up to 1.25" and an estimated single-family-home exposure of 3,495.
Check your ZIP in seconds to see whether hail activity from the August 10, 2021 Janesville, WI event was mapped near your area.
Public Hail, Wind, and Tornado Reports
Public storm report tables connected to the August 10, 2021 hail map for Janesville, WI currently list 0 public hail reports, 47 public wind reports, and 0 tornado reports.
| Date & Time | Hail Size | City | State | Description |
|---|---|---|---|---|
| No public hail reports are available for this event. | ||||
| Date & Time | Wind Speed | City | State | Description |
|---|---|---|---|---|
August 10, 2021 5:05 PM CT | Spring Green | WI | POWER POLES SNAPPED. | |
August 10, 2021 5:25 PM CT | Black Earth | WI | TREES AND WIRES DOWN. | |
August 10, 2021 5:30 PM CT | Cross Plains | WI | TREES AND WIRES DOWN. | |
August 10, 2021 5:42 PM CT | Middleton | WI | TREES AND WIRES DOWN. | |
August 10, 2021 5:46 PM CT | 1 N Rockford | IL | TREE DOWNED ON POWERLINES ALONG AUBURN STREET NEAR RIDGE AVENUE. TIME ESTIMATED BY RADAR. | |
August 10, 2021 5:50 PM CT | 2 E Rockford | IL | POWER LINES DOWNED ON STATE STREET NEAR PALM AVENUE. TIME ESTIMATED BY RADAR. | |
August 10, 2021 5:50 PM CT | Madison | WI | TREES AND WIRES DOWN. | |
August 10, 2021 5:55 PM CT | 3 ESE Loves Park | IL | 8-IN DIAMETER TREE DOWN ALONG SPRING BROOK ROAD WEST OF MULFORD ROAD. TIME ESTIMATED BY RADAR. | |
August 10, 2021 5:57 PM CT | Oregon | WI | TREES AND WIRES DOWN. | |
August 10, 2021 5:58 PM CT | Freeport | IL | TREE DOWN NEAR THE INTERSECTION OF IL 26 AND STEPHENSON ST. PICTURE FROM SOCIAL MEDIA. | |
August 10, 2021 6:00 PM CT | Roscoe | IL | LARGE TREE UPROOTED IN ROSCOE AREA. TIME ESTIMATED BY RADAR. | |
August 10, 2021 6:00 PM CT | Cottage Grove | WI | TREES AND WIRES DOWN. | |
August 10, 2021 6:05 PM CT | Leaf River | IL | MULTIPLE TREES DOWNED IN LEAF RIVER... INCLUDING SOME LARGE BRANCHES. TIME ESTIMATED BY RADAR. | |
August 10, 2021 6:12 PM CT | Pecatonica | IL | POWER LINES DOWNED IN THE VICINITY OF PECATONICA. TIME ESTIMATED BY RADAR. | |
August 10, 2021 6:15 PM CT | Rockton | IL | PHOTO SHARED VIA SOCIAL MEDIA SHOWS LARGE BRANCH DOWNED IN ROCKTON AREA. | |
August 10, 2021 6:15 PM CT | 2 SW Janesville | WI | TREE SPLIT...LARGE LIMB. | |
August 10, 2021 6:20 PM CT | 5 NNE Waterloo | WI | POWER LINES DOWN IN TOWN OF PORTLAND. | |
August 10, 2021 6:29 PM CT | 1 N New Milford | IL | TREES DOWN IN CHEROKEE HILLS NEIGHBORHOOD OF NEW MILFORD. TIME ESTIMATED BY RADAR. | |
August 10, 2021 6:33 PM CT | 2 NE Fairdale | IL | DAMAGE TO AGRICULTURE AND SOME TREES IN THE VICINITY OF KIRKLAND. GENERAL AREA WAS IN FAR NORTHWEST DEKALB COUNTY NORTH OF QUARRY ROAD AND SOUTHWEST OF CHERRY VALLEY ROAD. TIME ESTIMATED BY RADAR. | |
August 10, 2021 6:35 PM CT | 1 ENE Watertown | WI | MEDIUM SIZE TREE UPROOTED. | |
August 10, 2021 6:38 PM CT | 2 NE Lake In The Hills | IL | BILLBOARD DESTROYED ALONG VIRGINIA AVE IN CRYSTAL LAKE. | |
August 10, 2021 6:38 PM CT | 2 NE Lake In The Hills | IL | MULTIPLE TREES AND POWER LINES DOWNED IN THE CRYSTAL LAKE... ALGONQUIN... CARY... AND MCHENRY AREAS. TIME ESTIMATED BY RADAR. | |
August 10, 2021 6:39 PM CT | 1 E Crystal Lake | IL | NUMEROUS TREES AND TREE LIMBS DOWNED NEAR PINGREE ROAD AND US31 IN CRYSTAL LAKE. TIME ESTIMATED BY RADAR. | |
August 10, 2021 6:40 PM CT | 1 E Whitewater | WI | LARGE BRANCHES DOWN ACROSS EASTERN PORTION OF TOWN. | |
August 10, 2021 6:48 PM CT | 2 ESE Timberlane | IL | APPROXIMATELY 2 FOOT DIAMETER TREE SNAPPED AT BASE. | |
August 10, 2021 6:52 PM CT | Marengo | IL | BRANCH DOWNED IN MARENGO AREA. REPORT RELAYED VIA MPING. TIME ESTIMATED BY RADAR. | |
August 10, 2021 6:55 PM CT | 2 SE Eagle | WI | LARGE TREE FELL ON HOUSE AND CASUED SIGNIFICANT DAMAGE. | |
August 10, 2021 6:55 PM CT | Eagle | WI | LARGE LIMBS DOWN...POWER OUT AND 0.75 INCH HAIL. | |
August 10, 2021 7:03 PM CT | 2 N Bull Valley | IL | PUBLIC REPORT OF TREE BRANCHES DOWNED NEAR BULL VALLEY. RELAYED VIA MPING. TIME ESTIMATED BY RADAR. | |
August 10, 2021 7:05 PM CT | Greenwood | IL | NUMEROUS TREES DOWNED NEAR WONDER LAKE. ONE TREE HAS MOST BRANCHED REMOVED. TIME ESTIMATED BY RADAR. | |
August 10, 2021 7:05 PM CT | Mchenry | IL | DELAYED REPORT RELAYED VIA SOCIAL MEDIA. LARGE TREE DOWN THROUGH ROOF... WITH LARGE TREE ALSO BLOWN DOWN IN NEIGHBORING YARD. TIME ESTIMATED VIA RADAR. | |
August 10, 2021 7:11 PM CT | Elgin | IL | NUMEROUS REPORTS OF TREE BRANCHES DOWNED IN ELGIN AND VICINITY. RELAYED VIA MPING. TIME ESTIMATED BY RADAR. | |
August 10, 2021 7:11 PM CT | Sleepy Hollow | IL | DELAYED REPORT. RELAYED VIA SOCIAL MEDIA. LARGE TREE LIMBS BLOWN DOWN AND LARGE TREE BLOWN DOWN OR UPROOTED NEAR BEAU BRUMMEL DR AND SLEEPY HOLLOW RD. | |
August 10, 2021 7:12 PM CT | West Dundee | IL | DELAYED REPORT RELAYED VIA SOCIAL MEDIA. MULTIPLE LARGE TREES AND TREE LIMBS BLOWN DOWN THROUGHOUT TOWN. TIME ESTIMATED BY RADAR. | |
August 10, 2021 7:15 PM CT | Algonquin | IL | PUBLIC REPORT OF AN UPROOTED AND ANOTHER SNAPPED TREE IN ALGONQUIN. TIME ESTIMATED BY RADAR. | |
August 10, 2021 7:17 PM CT | 2 W Schaumburg | IL | APPROXIMATELY 5 INCH DIAMETER TREE LIMB DOWNED. | |
August 10, 2021 7:18 PM CT | 2 ENE South Barrington | IL | LARGE TREES DOWN. | |
August 10, 2021 7:30 PM CT | Grayslake | IL | TRAINED SPOTTER REPORTS SHINGLES BLOWN OFF ROOF IN GRAYSLAKE AREA. TIME ESTIMATED BY RADAR. | |
August 10, 2021 7:36 PM CT | Buffalo Grove | IL | SEVERAL TREES DOWNED AROUND BUFFALO GROVE. | |
August 10, 2021 5:35 PM CT | 60 mph | Milledgeville | IL | ESTIMATED 55 TO 60 MPH GUST. |
August 10, 2021 6:25 PM CT | 58 mph | 1 NNW Rochelle | IL | PRIVATE WEATHER STATION REPORTED 58 MPH GUST IN NORTHWEST ROCHELLE. |
August 10, 2021 6:48 PM CT | 60 mph | Island Lake | IL | No National Weather Service description provided. |
August 10, 2021 6:50 PM CT | 60 mph | 4 NW Harvard | IL | PRIVATE WEATHER STATION REPORTED 60 MPH GUST NORTHWEST OF HARVARD NEAR LAWRENCE ROAD AND MAXON ROAD. |
August 10, 2021 6:50 PM CT | 68 mph | 3 SW Eagle | WI | No National Weather Service description provided. |
August 10, 2021 6:58 PM CT | 77 mph | 3 SE Eagle | WI | LARGE TREES SNAPPED AND UPROOTED. |
August 10, 2021 7:00 PM CT | 67 mph | 3 SSE Harvard | IL | MEASURED WITH ANEMOMETER. LARGE TREES UPROOTED. |
August 10, 2021 7:30 PM CT | 60 mph | 1 NNW Roselle | IL | PRIVATE WEATHER STATION REPORTED 60 MPH GUST NEAR ROSELLE. |
| 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 10, 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 10, 2021 event. These related maps cover storm dates from Jul 27, 2021 through Aug 9, 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 9, 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 10, 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 10, 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 10, 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 10, 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 10, 2021 Janesville, WI hail event.