Tennessee Storm Data: Hail & Wind History Since 2010
Deduplicated storm activity for Tennessee, fused from NWS warnings, storm reports, official records, and FEMA declarations.
Latest Tennessee hail and wind storms
- Last reported hail in Tennessee (0.75 in.+, screening): September 21, 2026 — 1.00 in. reported at 2 N Mountain City (Johnson County), NWS Local Storm Report.
- 2026 so far in Tennessee: 16 hail days and 31 wind days statewide (days with a storm report or station gust at the screening thresholds; warnings alone never count).
| Date | Largest reported hail | Strongest gust | City pages hit |
|---|---|---|---|
| October 10, 2026 | — | 60 mph reported | — |
| September 21, 2026 | 1.00 in. reported | — | Chattanooga |
| September 13, 2026 | — | 50 mph reported | Jackson |
| August 22, 2026 | 1.50 in. reported | 60 mph measured | Memphis |
| August 20, 2026 | 0.75 in. reported | 47 mph reported | Knoxville |
| August 17, 2026 | 1.00 in. reported | — | Knoxville |
| August 12, 2026 | — | 62 mph reported | Kingsport |
| July 28, 2026 | 1.00 in. reported | — | — |
| July 11, 2026 | 1.00 in. reported | 50 mph reported | Jackson |
| July 9, 2026 | — | 50 mph reported | — |
Tennessee storm facts
- StormAuditor's analysis of NOAA and National Weather Service records found 3,869 deduplicated storm events (wind, hail, tornado, and flood; NWS warning products included) in Tennessee in the 12 months ending October 21, 2026.
- Storm activity touched 95 of 95 Tennessee counties over that period.
- The most impacted county in Tennessee was Knox, with 92 events.
- The busiest day by event count in Tennessee was April 28, 2026, with 199 events.
Tennessee storm activity at a glance (last 12 months)
StormAuditor's consolidated public record currently shows 3,869 storm events impacting 95 of Tennessee's 95 counties in the trailing 12 months: 2,066 wind events, 1,100 hail events, 70 tornado events, 633 flood events. Every count includes NWS warnings as well as observed reports, so tornado events mean tornado warnings and reports, not confirmed tornadoes.
Events are fused from National Weather Service warnings and Special Weather Statements, observed Local Storm Reports, official NCEI storm records, and FEMA disaster declarations, then consolidated into a single event table under the published methodology.
Wind covers thunderstorm and non-thunderstorm wind alike, so these counts measure something different from the NCEI entry counts in the history section below; the two are not comparable year to year. State totals also count NWS Special Weather Statements (radar-indicated hail or gusts below warning level); city pages leave those out.
Busiest days in Tennessee by event count
Ranked by the number of 12-month events, NWS warnings included, so a day with many warnings can outrank a day with larger hail.
- April 28, 2026 — 199 events incl. warnings (flood, hail, tornado, wind)
- March 15, 2026 — 173 events incl. warnings (hail, tornado, wind)
- March 11, 2026 — 126 events incl. warnings (hail, wind)
- July 3, 2026 — 125 events incl. warnings (flood, hail, wind)
- August 17, 2026 — 113 events incl. warnings (flood, hail, wind)
Most impacted counties
Events of every type for each county — wind, hail, tornado and flood, NWS warnings and Special Weather Statements included. City pages count wind and hail events only, so a county number on a city page is never higher than the number here.
- Knox — 92 events
- Lawrence — 77 events
- Davidson — 73 events
- Shelby — 73 events
- Wilson — 71 events
- Hamilton — 69 events
- Williamson — 67 events
- Lincoln — 65 events
Additional activity recorded under other NWS area names (forecast zones, tribal lands, and former census areas): Sevier/Smoky Mountains (6) · Blount Smoky Mountains (2) · Cocke Smoky Mountains (2) · Sevier Smoky Mountains (2).
How these numbers are counted
The storm numbers on this page are counted in four different ways, plus the free address check. Each answers a different question with its own size cutoffs, area and time span, so compare numbers within one group, not across groups.
- Storm days (latest hail and wind): A day in the last 12 months when at least one report anywhere in Tennessee showed hail 0.75 in. or larger or wind of 45 mph or more (StormAuditor screening thresholds). Reports are NWS storm reports from spotters, the public and officials, plus weather-station gusts, which count from 50 mph. A warning on its own never makes a storm day. The "City pages hit" column and each city's last reported hail apply the same rule within 25 miles of the city. The statewide columns count reports inside Tennessee only. City pages count reports within 25 miles of each city, which can reach into a neighboring state; those values name the other state, so a border city's value for a day can be higher than the Tennessee value.
- Storm-date pages (NWS severe): A storm-date page is published only when at least one report or station gust within 25 miles of a city met the National Weather Service severe criteria (hail 1.00 in. or larger, or wind 58 mph or more), at least two separate observations were logged, and the day ranks among the most significant. A storm report that relays an airport weather station's reading (the same station, the same gust and the same time) counts once, as the station reading. Not every storm day gets a page; when one does, the page and the storm-day table show the same largest hail and strongest gust.
- Events (12-month counts): Events count the Tennessee storm log: NWS warnings and Special Weather Statements (a lower-level NWS alert), storm reports (wind 50 mph+, hail 0.75 in.+), station gusts, NCEI entries and FEMA disaster declarations, for each county affected, floods included. One event is one place on one day, counted separately for each type (wind, hail, tornado, flood). A weather station or storm-report point counts once a day, at that day's highest reading, however many readings it filed; a place with hail and wind on the same day is two events. NWS warnings and Special Weather Statements count once per county per day, and NCEI entries and FEMA declarations once per place per day. A storm report that relays an airport weather station's reading (the same station, the same gust and the same time) counts once, as the station reading. The same report arriving through another feed (SPC or NCEI) is one record. The most impacted counties list uses this count. City pages count only wind and hail within 25 miles and leave out floods and Special Weather Statements, so city counts do not add up to the state total, and a city page's county count is a wind-and-hail count that is never higher than the same county's number here.
- NOAA history (since 2010): The official NOAA storm record (NCEI Storm Events) in Tennessee from January 1, 2010 to the day before the 12-month window starts: hail 0.50 in.+, thunderstorm wind 40 mph+ and tornadoes. It is a separate, older record with its own "storm days" (days with any entry), so its counts are not compared with the 12-month numbers.
- Free Report Snapshot: A free YES/NO estimate for one address, from radar and wind analysis at the property rather than area reports, at the same screening thresholds: hail 0.75 in. or wind 45 mph.
Full method: Methodology and Data Sources.
Tennessee hail and wind history in NOAA NCEI records, 2010–Oct. 2025
This section covers January 1, 2010 through October 20, 2025. Storms from October 21, 2025 on are in the 12-month summary above, so no date is counted in both.
The National Centers for Environmental Information logged 1,029 storm days in Tennessee in this period — 15,249 NCEI Storm Events entries in all. Thunderstorm wind outnumbers hail about 3.4 to 1 here: 11,126 wind reports against 3,268 hail reports.
The most storm days came in 2012, with 86; the fewest in a full year was 43, in 2024. Across 2022–2024, Tennessee averaged 58 storm days a year, below the 15-year average of 64.
On April 24, 2010, 4.50 in. (softball size) hail was reported in Chester County — the largest in these records for Tennessee. Hail of 2 inches or more appears in 14 different years of this record, the latest being 2025 through Oct. 20.
The strongest measured thunderstorm gust was 87 mph, reached in 2015 and 2024 — most recently on May 26, 2024 in Fentress County. NCEI also lists 855 tornado entries in Tennessee — one entry per county a tornado crossed.
Hail peaks in May (26% of all hail reports), while thunderstorm wind reports cluster in July. December through February accounts for 82 storm days.
- Average: 64 storm days a year (2010–2024)
- March and May: 47% of all hail reports
- Most hail reports in one year: 452 in 2012
- Hail of 1 in. or larger reported in every full year, 2010–2024
| Year | Hail reports | Thunderstorm wind reports | Tornado entries | Storm days | Largest hail | Strongest measured gust |
|---|---|---|---|---|---|---|
| 2010 | 167 | 523 | 39 | 77 | 4.50 in. | 84 mph |
| 2011 | 383 | 839 | 125 | 78 | 4.25 in. | 74 mph |
| 2012 | 452 | 597 | 33 | 86 | 3.00 in. | 82 mph |
| 2013 | 77 | 447 | 54 | 59 | 1.75 in. | 76 mph |
| 2014 | 100 | 546 | 20 | 58 | 2.75 in. | 85 mph |
| 2015 | 105 | 417 | 26 | 59 | 3.00 in. | 87 mph |
| 2016 | 123 | 817 | 12 | 81 | 2.50 in. | 69 mph |
| 2017 | 225 | 714 | 40 | 55 | 3.00 in. | 70 mph |
| 2018 | 128 | 575 | 32 | 65 | 2.50 in. | 72 mph |
| 2019 | 46 | 575 | 24 | 60 | 1.75 in. | 78 mph |
| 2020 | 96 | 628 | 41 | 60 | 3.00 in. | 79 mph |
| 2021 | 276 | 768 | 194 | 54 | 2.25 in. | 69 mph |
| 2022 | 260 | 902 | 12 | 60 | 4.00 in. | 70 mph |
| 2023 | 296 | 1,670 | 120 | 70 | 2.75 in. | 85 mph |
| 2024 | 169 | 504 | 23 | 43 | 3.00 in. | 87 mph |
| 2025 through Oct. 20 | 365 | 604 | 60 | 64 | 3.00 in. | 72 mph |
Counties with the most NCEI storm reports, 2010–Oct. 2025
| County | All entries | Hail | Thunderstorm wind |
|---|---|---|---|
| Davidson County | 929 | 157 | 738 |
| Williamson County | 524 | 154 | 357 |
| Wilson County | 496 | 80 | 387 |
| Shelby County | 482 | 154 | 325 |
| Sumner County | 401 | 106 | 270 |
| Knox County | 393 | 82 | 304 |
| Rutherford County | 387 | 95 | 269 |
| Lawrence County | 369 | 58 | 292 |
| Robertson County | 307 | 77 | 212 |
| Hamilton County | 300 | 41 | 239 |
Download this history: CSV · JSON at https://www.stormauditor.com/downloads/storm-history/tn.json (free, open license, cite StormAuditor).
Source: NOAA NCEI Storm Events Database (thunderstorm wind, hail, and tornado entries; hail 0.50 in. or larger, wind 40 mph or more; wind converted from knots).
Tennessee storm history questions, 2010–Oct. 2025
How big did hail get in Tennessee, 2010–Oct. 2025?
4.50 in., softball size, reported on April 24, 2010 in Chester County, per NCEI. Hail of 2 inches or more appears in 14 years of this record in all, most recently 2023, 2024 and 2025 through Oct. 20.
Which year had the most storm days in Tennessee, 2010–Oct. 2025?
2012, with 86 storm days (452 hail reports, 597 thunderstorm wind reports, 33 tornado entries). The 15-year average is 64 storm days.
How many hail reports does Tennessee see in a typical year?
About 194 hail reports a year (2010–2024 average), with 1-inch or larger hail reported every year. Thunderstorm wind averages 701 reports a year.
What month has the most hail in Tennessee?
May has the most hail reports (836, 2010–Oct. 2025), followed by March (694) and April (604).
What is the strongest measured thunderstorm gust in Tennessee, 2010–Oct. 2025?
87 mph, reached in 2015 and 2024; most recently measured on May 26, 2024 in Fentress County. Only gusts NCEI lists as measured count here; gusts measured on a date and county with a tornado entry, and entries of 120 knots or more (known entry errors), are left out.
For roofers, adjusters, and claim attorneys: the professional tools add statewide hail and wind swath maps, the Zone Canvas Tool, and Audit Reports with the evidence and arithmetic — see how roofing contractors and insurance claim attorneys use them.
Sources: NWS alerts (api.weather.gov) · NWS Local Storm Reports via the Iowa Environmental Mesonet · ASOS/AWOS station gusts via the Iowa Environmental Mesonet · NOAA NCEI Storm Events Database · every StormAuditor data source.
Download the Tennessee dataset (free)
The full consolidated Tennessee event list for the trailing 12 months — dates, counties, hazard types, severities, measured gusts and hail sizes, with coordinates; source records deduplicated, and each NWS warning product listed per affected county — downloads free and stays current with the live record: download CSV · JSON at https://www.stormauditor.com/downloads/storm-data/tn.json. Free to reuse under the data license; the JSON file carries a field dictionary and provenance notes.
Research a specific Tennessee address
Statewide counts tell you where activity concentrated; they do not tell you what happened at one property. For an individual address:
- Run the Free Report Snapshot — an instant YES/NO against StormAuditor's screening thresholds (wind ≥ 45 mph, hail ≥ 0.75 in., deliberately below the official NWS severe criteria).
- Use the Address Lookup for warnings, storm reports, and station observations at the address.
- Buy a full Weather Report for $2.99 covering every qualifying storm date at the address.
Browse day-by-day activity on the Storm Calendar (Pro plans and higher) or compare states on the Storm Data hub.
All values are derived from public NOAA and NWS data under StormAuditor's published methodology (see Limitations). Data last refreshed October 21, 2026.
See where recent storms tracked on the statewide Tennessee hail map and wind map (the Hail and Wind Explorers, included with Pro+ and Organization plans), or check the county impact heatmap (free with an account).
Tennessee cities A–Z: last reported hail
- Chattanooga hail & wind history — last hail September 21, 2026 (1.00 in. reported in Georgia)
- Clarksville hail & wind history — last hail July 2, 2026 (1.00 in. reported)
- Franklin hail & wind history — last hail November 7, 2025 (1.00 in. reported)
- Hendersonville hail & wind history — last hail April 27, 2026 (1.00 in. reported)
- Jackson hail & wind history — last hail July 11, 2026 (1.00 in. reported)
- Johnson City hail & wind history — last hail June 29, 2026 (1.00 in. reported)
- Kingsport hail & wind history — no 0.75 in.+ hail reported within 25 miles in 12 months
- Knoxville hail & wind history — last hail August 20, 2026 (0.75 in. reported)
- Memphis hail & wind history — last hail June 1, 2026 (1.50 in. reported in Mississippi)
- Murfreesboro hail & wind history — last hail November 7, 2025 (1.00 in. reported)
- Nashville hail & wind history — last hail March 11, 2026 (0.88 in. reported)
- Smyrna hail & wind history — last hail March 11, 2026 (0.88 in. reported)
Neighboring states: Alabama storm data · Arkansas storm data · Georgia storm data · Kentucky storm data · Missouri storm data · Mississippi storm data
Guides for reading this data
Storm-day records in Tennessee
The newest storm-date pages for Tennessee cities: a report or station gust within 25 miles of the city met NWS severe criteria (hail 1.00 in.+ or wind 58 mph+), with at least two separate observations. Each page lists the reports, station gusts and a free way to check one address:
Cite or link to this data — free
Free to quote, summarize, reuse, and link — for bloggers, journalists, researchers, contractors, and AI writing tools. No permission or credit required. A ready-made citation and link are below if they help. Terms: StormAuditor data & content license.
Citation: StormAuditor. "Tennessee Storm Data: Hail & Wind History Since 2010." Updated October 14, 2026. https://www.stormauditor.com/storm-data/tn
HTML link: <a href="https://www.stormauditor.com/storm-data/tn">Tennessee Storm Data: Hail & Wind History Since 2010 — StormAuditor</a>
About this page: built by Storm Auditor LLC from public NOAA/NWS records — deduplicated warnings, storm reports, station measurements, and official records on a rolling 12-month window, under the published methodology. See the StormAuditor Editorial Team for how content is produced.