Hail Swath Map Preview
The Knoxville, TN hail swath map preview was last reviewed on August 27, 2026 and shows mapped hail estimates up to 1.25". There are 1 public hail reports, 25 public wind reports, and 0 nearby tornado reports listed for the June 21, 2021 event.
View the June 21, 2021 Knoxville, TN 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 Knoxville, TN Hail Map
The June 21, 2021 hail swath map for Knoxville, TN covers approximately 448 square miles and includes an estimated 33,937 people inside the mapped footprint. The largest mapped area is in the < 0.50" hail band, covering 271 square miles. The highest estimated population exposure is in the < 0.50" hail band with 21,950 people.
| Mapped Hail Band | Impact Area | Population |
|---|---|---|
| < 0.50" | 271 sq mi | 21,950 |
| 0.50-0.75" | 153 sq mi | 10,888 |
| 0.75-1.00" | 16 sq mi | 940 |
| 1.00-1.25" | 6 sq mi | 95 |
| 1.25-1.50" | 2 sq mi | 64 |
Get a free Hail Report by ZIP to see a more local hail signal and whether the June 21, 2021 Knoxville, TN hail event may have reached your area.
Housing Exposure Inside the Knoxville, TN Hail Swath Map
Inside the June 21, 2021 hail swath map area for Knoxville, TN, HailGeeks estimates 15,418 single-family homes, 207 townhomes, and 1,564 multifamily properties within the mapped storm footprint. Single-family-home exposure is highest in the < 0.50" hail band, with 10,026 single-family homes.
| Mapped Hail Band | Single-Family | Townhomes | Multifamily |
|---|---|---|---|
| < 0.50" | 10,026 | 148 | 1,123 |
| 0.50-0.75" | 4,926 | 54 | 422 |
| 0.75-1.00" | 392 | 5 | 18 |
| 1.00-1.25" | 42 | 0 | 0 |
| 1.25-1.50" | 32 | 0 | 1 |
Use this table to review housing exposure by hail band for the June 21, 2021 Knoxville, TN hail map. To check a specific property more closely, use a free Hail Report by Address.
Counties Inside the Knoxville, TN Hail Map
Hail from the June 21, 2021 storm was mapped across 21 counties in the Knoxville, TN region. Grainger County, TN had the strongest mapped signal, peaking at 1.25" with roughly 412 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 Knoxville, TN Hail Map
Zooming in, the swath touched 8 cities near Knoxville, TN. Harriman, TN had the strongest mapped signal at 0.50", with an estimated 1,778 single-family homes exposed.
City cards show where the June 21, 2021 Knoxville, TN 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 Knoxville, TN Hail Swath Map
At the ZIP level, the June 21, 2021 Knoxville, TN hail map spans 29 ZIP codes. ZIP 37881 shows the strongest local signal, with mapped hail estimates up to 1.25" and an estimated single-family-home exposure of 412.
Check your ZIP in seconds to see whether hail activity from the June 21, 2021 Knoxville, TN event was mapped near your area.
Public Hail, Wind, and Tornado Reports
Public storm report tables connected to the June 21, 2021 hail map for Knoxville, TN currently list 1 public hail reports, 25 public wind reports, and 0 tornado reports.
| Date & Time | Hail Size | City | State | Description |
|---|---|---|---|---|
June 21, 2021 4:08 PM CT |
1.50 in | 3 N Treadway | TN | No National Weather Service description provided. |
| Date & Time | Wind Speed | City | State | Description |
|---|---|---|---|---|
June 21, 2021 3:45 PM CT | 5 WNW Wartburg | TN | A FEW TREES DOWN. | |
June 21, 2021 4:09 PM CT | 2 NNW Wartburg | TN | A FEW TREES DOWN. | |
June 21, 2021 4:15 PM CT | 3 SSW Rosedale | TN | A FEW TREES DOWN. | |
June 21, 2021 4:19 PM CT | 1 W Louden | KY | TREE LIMBS REPORTED DOWN ALONG WITH DAMAGE TO A ROOF. TIME ESTIMATED FROM RADAR. | |
June 21, 2021 4:24 PM CT | 4 WNW Treadway | TN | COUPLE TREES DOWN. | |
June 21, 2021 4:25 PM CT | Speedwell | TN | SCATTERED TO NUMEROUS TREES DOWN THROUGHOUT THE COUNTY IN ADDITION TO DOWNED POWERLINES. | |
June 21, 2021 4:27 PM CT | 1 ESE Binghamtown | KY | TREE DOWN ON HAPPY HOLLOW ROAD. | |
June 21, 2021 4:27 PM CT | 1 SSE Binghamtown | KY | TREES DOWN ON HURST ROAD OFF OF HWY 119. | |
June 21, 2021 4:28 PM CT | 5 W Huntsville | TN | SEVERAL TREES DOWN ACROSS THE SOUTH END OF THE COUNTY. | |
June 21, 2021 4:29 PM CT | 3 SE Clairfield | TN | FEW TREES DOWN. | |
June 21, 2021 4:50 PM CT | 3 NNE Halls | TN | NUMEROUS TREES DOWN ACROSS NORTH KNOX COUNTY. | |
June 21, 2021 4:51 PM CT | 2 ESE Halls | TN | A FEW TREES DOWN. | |
June 21, 2021 5:07 PM CT | 2 SW Norris Lake | TN | A FEW TREES DOWN. | |
June 21, 2021 5:12 PM CT | 2 NE Rutledge | TN | SEVERE TREES DOWN. | |
June 21, 2021 5:17 PM CT | 6 NW Howard Quarter | TN | SEVERAL TREES DOWN ACROSS THE COUNTY. | |
June 21, 2021 5:18 PM CT | 3 ESE Clairfield | TN | SEVERAL TREES DOWN NEAR THE CLAIRFIELD AREA. | |
June 21, 2021 5:30 PM CT | 3 SSE Rose Hill | VA | A FEW TREES DOWN. | |
June 21, 2021 5:35 PM CT | 4 WNW Vonore | TN | SEVERAL TREES DOWN ACROSS NORTHERN MONROE COUNTY. | |
June 21, 2021 6:06 PM CT | 2 N Mount Vernon | TN | REPORT FROM MPING: 1-INCH TREE LIMBS BROKEN; SHINGLES BLOWN OFF. | |
June 21, 2021 6:12 PM CT | 5 N Alcoa | TN | SEVERAL TREES DOWN ACROSS THE COUNTY. | |
June 21, 2021 6:13 PM CT | 5 NNW Talassee | TN | TREES DOWN ACROSS THE AREA. | |
June 21, 2021 6:17 PM CT | Crab Orchard | TN | SEVERAL TREES DOWN IN THE CRAB ORCHARD COMMUNITY | |
June 21, 2021 6:35 PM CT | Rockwood | TN | NUMEROUS TREES AND POWERLINES DOWN THROUGHOUT THE COUNTY... ROCKWOOD AREA HIT THE HARDEST. | |
June 21, 2021 6:40 PM CT | 11 NE Fontana Village | NC | COUNTY DISPATCH CONFIRMED MULTIPLE TREES AND POWERLINES DOWN ACROSS PARTS OF SWAIN COUNTY. | |
June 21, 2021 6:42 PM CT | 2 SW Rockwood | TN | SEVERAL TREES DOWN NEAR THE ROCKWOOD AREA. |
| 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 June 21, 2021 Knoxville, TN storm event. When available, each report may include the time, size or magnitude, city, state, and a short description.
Related Hail Maps in the Knoxville, TN Region
We found 6 more hail maps with reports from the same Knoxville, TN region as the June 21, 2021 event. These related maps cover storm dates from Mar 18, 2021 through Jun 13, 2021, with mapped hail estimates ranging from 0.75" to 1.50". In this set, the strongest related map reached 1.50", and the most recent map shown is from Jun 13, 2021.
If none of these related Knoxville, TN 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 Knoxville, TN region — so you can check whether hail activity may have reached your property.
Local Hail Review Options Near Knoxville, TN
Not sure whether the June 21, 2021 Knoxville, TN 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 Knoxville, TN 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 June 21, 2021 Knoxville, TN event — or another recent hail event — may have been mapped at that address.
Find a roof or exterior pro serving the Knoxville, TN 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 June 21, 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 June 21, 2021 hail map visuals alone. They do not confirm property damage and do not replace an on-site inspection for a property in the Knoxville, TN 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 June 21, 2021 Knoxville, TN hail event.