Hail History

Hail history for Oak Ridge, Tennessee

NOAA hail reports in and within about 5 km (3 miles) of Oak Ridge since 1959, with preliminary reports to November 3, 2026.

Readout · Oak Ridge

Last hail
Sep 4, 2025
1.00 in, quarter size
Hail days, last 5 years
6
since Nov 3, 2021 · 15 reports
Largest ever
4.00 in
grapefruit · Apr 28, 1959

50 reports on 34 days since 1959 · #13 of 180 Tennessee places

Hail map · Oak Ridge

Oak Ridge Farragut Clinton Kingston Powell Knoxville 10 mi
  • Under 1 in
  • 1–1.75 in
  • 1.75–2.5 in
  • 2.5–4 in
  • 4 in +
  • No size
50 most recent reports with a location; Anderson County is shaded. Open street map

For homeowners

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What the record says about Oak Ridge

The latest hail report in and around Oak Ridge is from September 4, 2025, 1.00 in (quarter size). Since November 3, 2021 there have been 6 separate hail days; the biggest stones in that time were 1.75 in on April 10, 2025.

Over the 20 years 2006–2025, Oak Ridge logged 27 reports on 15 hail days, about 1.4 reports a year. That is 2.7 times the median Tennessee town on this site (0.5 a year) and ranks #13 of 180 Tennessee cities and towns on this site for all-time reports. Oak Ridge accounts for 57% of the 87 reports filed in Anderson County.

6% of reports with a size were 2 inches (hen egg) or larger, against 3% for the median Tennessee town on this site. The largest hail on record here is 4.00 in (grapefruit) on April 28, 1959.

Reports were up 100% in 2016–2025 (18) compared with 2006–2015 (9). The busiest year was 2025, with 11 reports on 3 days. Hail here peaks in May (24% of reports); 66% fall between April and June.

Reports a year 2006–2025 average

  • Oak Ridge 1.4
  • Anderson County 1.9
  • Median Tennessee town on this site 0.5

Hail days 2006–2025

  • Oak Ridge 15
  • Anderson County 27
  • Median Tennessee town on this site 8.5

Share 2 in or larger of sized reports

  • Oak Ridge 6%
  • Anderson County 5%
  • Median Tennessee town on this site 3%

Hail over time

051015 1959: 2 reports, largest 4.00 in 1960 1968: 1 reports, largest 1.00 in 1970: 1 reports, largest 0.75 in 1970 1980 1981: 1 reports, largest 0.75 in 1985: 1 reports, largest 1.75 in 1990 1996: 1 reports, largest 0.75 in 1998: 2 reports, largest 0.75 in 2000: 1 reports, largest 1.00 in 2000 2001: 2 reports, largest 1.00 in 2002: 1 reports, largest 0.75 in 2003: 5 reports, largest 1.00 in 2004: 3 reports, largest 0.88 in 2005: 2 reports, largest 1.00 in 2006: 1 reports, largest 1.00 in 2007: 1 reports, largest 0.75 in 2009: 1 reports, largest 1.00 in 2010 2012: 2 reports, largest 1.75 in 2013: 1 reports, largest 1.25 in 2014: 3 reports, largest 1.00 in 2016: 2 reports, largest 1.50 in 2017: 1 reports, largest 2.00 in 2020 2023: 4 reports, largest 1.00 in 2025: 11 reports, largest 1.75 in
Reports per year, 1959–2026. Bar colour shows the largest hail that year. Reporting grew sharply after the mid-1990s, so early decades undercount.
051015 Jan February: 1 reports (2%) Feb March: 5 reports (10%) Mar April: 11 reports (22%) Apr May: 12 reports (24%) May June: 10 reports (20%) Jun July: 3 reports (6%) Jul August: 4 reports (8%) Aug September: 3 reports (6%) Sep October: 1 reports (2%) Oct Nov Dec
All 50 reports by calendar month.
Reports per month, 2017–2026. Darker cells had more reports.
YearJanFebMarAprMayJunJulAugSepOctNovDecTotal
2026 0
2025 353 11
2024 0
2023 22 4
2022 0
2021 0
2020 0
2019 0
2018 0
2017 1 1

Hail days since Nov 3, 2021

DateReportsLargestStorm page
Sep 4, 2025 3 1.25 in —
Apr 10, 2025 5 1.75 in —
Mar 15, 2025 3 1.00 in —
Jun 5, 2023 1 1.00 in —
Jun 4, 2023 1 1.00 in —
May 16, 2023 2 1.00 in —

Largest hail on record

Largest hail reports in Oak Ridge
Date Size Location County Time · source
Apr 28, 1959 4.00 ingrapefruit — Loudon 11:45 local · NCEI
Apr 28, 1959 3.00 inteacup — Anderson 12:00 local · NCEI
Mar 21, 2017 2.00 inhen egg 2.34 WSW Dixie Lee Jct Loudon 18:12 local · NCEI
Apr 10, 2025 1.75 ingolf ball 0.69 S Robinson Knox 16:38 local · NCEI
Apr 10, 2025 1.75 ingolf ball Solway Knox 16:20 local · NCEI

Sizes filed before 1996 are often rough estimates (round numbers like 7.00 or 8.00 in) without an exact spot; they are shown as NOAA filed them.

Size of every report

Most recent reports

Most recent hail reports in Oak Ridge
Date Size Location County Time · source
Sep 4, 2025 1.00 inquarter 1.68 E Union Roane 15:00 local · NCEI
Sep 4, 2025 1.00 inquarter 1.68 W Byington Knox 12:30 local · NCEI
Sep 4, 2025 1.25 inhalf dollar 0.56 E Branch Hill Knox 12:30 local · NCEI
Apr 10, 2025 1.75 ingolf ball 0.69 S Robinson Knox 16:38 local · NCEI
Apr 10, 2025 1.75 ingolf ball Solway Knox 16:20 local · NCEI
Apr 10, 2025 1.75 ingolf ball 0.69 S Oak Ridge Anderson 16:13 local · NCEI
Apr 10, 2025 1.00 inquarter 2.82 SSE Hanna Anderson 16:11 local · NCEI
Apr 10, 2025 1.00 inquarter 2.98 SSW Oak Ridge Anderson 16:06 local · NCEI
Mar 15, 2025 1.00 inquarter 1.31 ESE Batley Anderson 19:23 local · NCEI
Mar 15, 2025 1.00 inquarter 0.89 SE Oak Ridge Anderson 19:20 local · NCEI
Mar 15, 2025 1.00 inquarter 1.81 ESE Batley Anderson 19:20 local · NCEI
Jun 5, 2023 1.00 inquarter 4.47 SSW Oak Ridge Anderson 14:30 local · NCEI

Hail history near Oak Ridge

Questions about hail in Oak Ridge

How often does it hail in Oak Ridge, Tennessee?

50 hail reports have been logged in and within about 5 km (3 miles) of Oak Ridge since 1959. Over the 20 years 2006–2025 that averages 1.4 reports a year. That ranks #13 of 180 Tennessee places by number of reports.

When is hail season in Oak Ridge?

Most reports come in May, April, June. May alone accounts for 24% of all reports.

What is the largest hail recorded in Oak Ridge?

4.00 in (grapefruit size) on April 28, 1959. 6% of reports here were 2 inches or larger.

When did it last hail in Oak Ridge?

The most recent report in this data is from September 4, 2025 (1.00 in). Final NOAA data runs to July 31, 2026; preliminary NWS reports run to November 3, 2026.

How many hail storms has Oak Ridge had in the last five years?

6 separate days with hail reports since November 3, 2021, adding up to 15 reports. The most recent was September 4, 2025.

Where does this hail data come from?

Hail reports come from the NOAA NCEI Storm Events Database, which the National Weather Service compiles from spotter, public, law enforcement and media reports. Recent days use preliminary NWS Local Storm Reports via the Iowa Environmental Mesonet until NOAA publishes final data. Only reported hail is counted, so areas with fewer people tend to have fewer reports.