Data current as of 2026-10-16 · Sourced from NOAA Storm Events
Over the past five years, the National Oceanic and Atmospheric Administration has recorded 58 hail storms within 25 miles of Knoxville, TN. Of those, 45 produced hail at least quarter-size — the threshold most insurance carriers consider potentially damaging to asphalt shingles. The largest reported hail in this window was ping pong ball-sized, which can fracture shingle mat and dent metal flashing on contact. 2025 was the most active year on record locally, with 27 documented hail events.
Check Hail History for a Specific Address in Knoxville| Severity | Count | What it means for roofs |
|---|---|---|
| Severe | 4 events | Ping pong-size, granule loss and bruising common |
| Significant | 41 events | Quarter-size, the standard insurance damage threshold |
| Moderate | 12 events | Marble-size, possible cosmetic damage |
| Minor | 1 event | Pea-size, unlikely to damage modern shingles |
| Year | Reported Hail Events Within 25 mi |
|---|---|
| 2026 | 6 events |
| 2025 | 27 events |
| 2024 | 7 events |
| 2023 | 16 events |
| 2022 | 2 events |
2025 was the busiest hail year on record locally for Knoxville, with 27 documented events inside the 25-mile radius. Storm activity in Knoxville typically peaks in spring and early summer, when the jet stream pushes Gulf moisture into the area and supercell thunderstorms become more frequent.
| Date | Location | Severity | Size | NOAA Comments |
|---|---|---|---|---|
| 2026-09-06 | Kodak, TN | Minor | 0.25" | — |
| 2026-08-21 | 2 NW Farragut, TN | Moderate | 0.75" | Report from mPING: Dime (0.75 in.). |
| 2026-08-17 | 1 W Maryville, TN | Significant | 1.00" | Report from mPING: Quarter (1.00 in.). |
| 2026-07-03 | 4 W Clinton, TN | Moderate | 0.75" | Report from mPING: Dime (0.75 in.). |
| 2026-07-03 | 6 NE Oak Ridge, TN | Moderate | 0.75" | Brief power loss accompanying the hail. |
| 2026-07-03 | 2 WNW Clinton, TN | Significant | 1.00" | Two separate Facebook reports of large hail in Clinton, no ruler or measurement but both look to be at least quarter sized. |
| 2025-10-21 | PUMPKIN CENTER, TN | Moderate | 0.75" | — |
| 2025-10-21 | NEUBERT, TN | Moderate | 0.75" | — |
| 2025-10-21 | HENRY XRDS, TN | Moderate | 0.88" | — |
| 2025-10-21 | SHOOKS GAP, TN | Moderate | 0.88" | — |
| 2025-10-21 | KODAK, TN | Significant | 1.00" | — |
| 2025-10-21 | KODAK, TN | Moderate | 0.75" | — |
| 2025-09-04 | CEDAR BLUFF, TN | Moderate | 0.75" | — |
| 2025-09-04 | BRANCH HILL, TN | Significant | 1.25" | — |
| 2025-09-04 | LYONS VIEW, TN | Moderate | 0.75" | — |
| 2025-09-04 | BYINGTON, TN | Significant | 1.00" | — |
| 2025-09-04 | BEAVER RIDGE, TN | Severe | 1.50" | — |
| 2025-09-04 | BEAVER RIDGE, TN | Severe | 1.75" | — |
| 2025-09-04 | CEDAR BLUFF, TN | Significant | 1.00" | — |
| 2025-09-04 | CATLETTSBURG, TN | Significant | 1.00" | — |
NOAA has recorded 200 high-wind events within 25 miles of Knoxville, TN in the past five years. Of those, 200 reached severe-thunderstorm thresholds (58+ mph). The highest measured gust was 85 mph.
| Severity | Count |
|---|---|
| Severe | 21 events |
| Significant | 179 events |
| Date | Location | Gust (mph) | Severity | NOAA Comments |
|---|---|---|---|---|
| 2026-05-20 | SOUTH KNOXVILLE, TN | 60 | Significant | A large tree was felled by severe thunderstorm wind gusts and blocked the entirety of a local road. |
| 2026-05-20 | CRENSHAW, TN | 60 | Significant | A large tree was felled by severe thunderstorm wind gusts and partially blocked a roadway. |
| 2026-05-20 | KINGSLEY, TN | 60 | Significant | A large tree was knocked over by thunderstorm winds, hanging over a local road on top of powerlines. |
| 2026-05-20 | SOUTH KNOXVILLE, TN | 60 | Significant | A large tree was felled by severe thunderstorm winds and blocked the whole road. |
| 2026-05-20 | RITTA, TN | 60 | Significant | Tree felled by severe thunderstorm winds partially blocked the eastbound lanes of a local road. |
| 2026-03-16 | FOREST HILL, TN | 60 | Significant | Multiple trees were blown down by severe thunderstorm wind gusts. |
| 2026-03-11 | DISCO, TN | 60 | Significant | Several trees were downed by severe thunderstorm wind gusts, along with a couple of downed powerlines, and a damaged carport in the area of Disco Loop Road and Lake Court in Friendsville. |
| 2026-02-20 | KNOXVILLE DOWNTOWN I, TN | 60 | Significant | Multiple trees and powerlines were blown down across Knoxville by severe thunderstorm winds, with at least one tree falling on a home in East Knoxville. |
| 2026-02-20 | SOUTH KNOXVILLE, TN | 60 | Significant | Strips of green tin roof were peeled off an inn on Chapman Highway by severe thunderstorm wind gusts. |
| 2026-02-20 | (TYS)MCGHEE TYSON KN, TN | 60 | Significant | Knoxville McGhee Tyson Airport measured a peak wind gust of 60 mph associated with the line of convective showers. |
| 2025-12-18 | KNOXVILLE, TN | 60 | Significant | Over 75 calls to the county 911 system occurred due to severe wind gusts causing multiple trees and powerlines to be damaged. |
| 2025-12-18 | (TYS)MCGHEE TYSON KN, TN | 62 | Significant | The Knoxville McGhee Tyson Airport ASOS recorded a 54 knot wind gust during the passage of severe thunderstorms. |
| 2025-12-18 | SEQUOYAH HILLS, TN | 70 | Severe | A 36 inch diameter oak tree was felled by severe thunderstorm winds and sliced through the side of a home, requiring the fire department to extricate 1 person. No confirmed injuries. Fire department reported another tree falling on a separate house in Knoxville as well as several other incidents of tree damage across the city. |
| 2025-12-18 | POWELL, TN | 64 | Severe | A flag pole in the front yard of a home in Powell was bent all the way to the ground by severe thunderstorm wind gusts. |
| 2025-09-04 | SUBURBAN HILLS, TN | 60 | Significant | A large diameter tree branch was sheared off a tree by powerful thunderstorm wind gusts. |
| 2025-09-04 | BOYDS CREEK, TN | 60 | Significant | A large tree was blown down onto powerlines by severe thunderstorm gusts. |
| 2025-09-04 | PITNER, TN | 60 | Significant | A large tree was blown down across the road by powerful thunderstorm winds. At 2:55 PM EDT, the Sevierville AWOS recorded a 53 mph wind gust with this thunderstorm. |
| 2025-09-04 | HARRISBURG, TN | 60 | Significant | Several trees were blown down by severe thunderstorm winds near the Sevier County campus of Walters State Community College. |
| 2025-05-20 | DYLLIS, TN | 60 | Significant | A few trees were felled by powerful thunderstorm gusts. |
| 2025-05-20 | LOVELL, TN | 73 | Severe | Severe convective gust measured on an at home anemometer. |
The most recent quarter-size-or-larger hail storm recorded by NOAA within 25 miles of Knoxville was on August 17, 2026. HailCheck refreshes from the NOAA Storm Events database daily, so newer events appear here as they are reported.
Knoxville averages roughly 12 reported hail events per year within a 25-mile radius. Significant storms (quarter-size or larger) account for 45 of the 58 events recorded over the last five years.
The largest documented hail near Knoxville in the last five years was ping pong ball-sized. Most Knoxville-area hail falls in the marble-to-quarter range, with destructive storms (egg-size or larger) appearing roughly once every few years.
Most homeowners insurance policies in TN cover hail damage to roofs, siding, and gutters under the dwelling and other-structures coverage. Coverage typically requires the damage to be tied to a verifiable storm date — which is where the NOAA hail history above (and a HAAG-style test square validation) becomes important for the claim file.
Use the HailCheck address search to enter any street address in or near Knoxville. HailCheck returns every NOAA hail event within a configurable radius, along with severity bands, dates, and storm narratives for Pro members.
If your property in or near Knoxville took on hail during one of the storms above, the standard process for documenting damage is a 10×10 foot test square inspection. A HAAG-trained reviewer counts impact indicators — granule displacement, mat fractures, and bruising — within the marked square and produces a PASS or FAIL document for the claim file.
HailCheck offers a $99 photo-based HAAG-style test square validation. You submit photos from the field, our reviewer evaluates the impact indicators and cross-references the NOAA storm dates listed above, and a written PASS/FAIL determination is returned within one business day. We do not send anyone to the roof — the validation is built around the photos you submit.
Learn About $99 HAAG-Style ValidationKnoxville sits east of the traditional hail alley, where hail events are less frequent than the central plains but tend to be associated with strong squall lines and tropical systems. Local roof systems are less commonly hardened for hail, which can mean even moderate impacts produce claim-worthy damage.