Hail History

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Hail history for Knoxville, IA

Last hail within 10 milesMay 19, 20251 in (quarter)
Hail days, last 12 monthsNone
Largest hail since 20064 in (grapefruit)Jun 20, 2015
Hail days since 200647
Days with hail 1 inch or larger33
Tornadoes within 10 miles11
Damaging wind reports within 10 miles104

Hail has been reported within 10 miles of Knoxville on 47 days since 2006. The largest stones measured 4 in (grapefruit) on Jun 20, 2015. Hail is most common here in June and April.

Recent hail near Knoxville

DateHail sizeWhereSource
May 19, 20251 in
quarter		Knoxville Airport
1 hail report · closest 3 mi from Knoxville		NOAA Storm Events

One row per day: the largest hail reported that day within 10 miles, the places and the number of reports.

Hail days near Knoxville by year

5062072081093104111121131143151641721821912012112262362412526

When hail season peaks near Knoxville

Of the 47 hail days since 2006, most fell in June (11) and April (10).

JanFeb2Mar10Apr10May11Jun8Jul1Aug4Sep1OctNovDec

Largest hail storms near Knoxville

Jun 20, 2015 · 4 in (grapefruit) · Harvey (10 mi from Knoxville)

National Weather Service description (English): Public report of measured hailstones around 4 inches in diameter. Photos were on twitter and the KCCI ulocal page. Time radar estimated.

Jun 15, 2017 · 2.75 in (baseball) · Columbia (6 mi from Knoxville)

National Weather Service description (English): Multiple patrol cars and EMA vehicles were damaged by large hail up to baseball size. Some reports coming in of damages to homes, buildings, etc from hail. Most reports of hail from southern 1/3 of Marion County from Melcher-Dallas to west of Attica.

Jul 27, 2008 · 2.5 in (tennis ball) · Knoxville (0 mi from Knoxville)

Jun 18, 2021 · 2.5 in (tennis ball) · Lake Red Rock (6 mi from Knoxville)

National Weather Service description (English): Delayed report of 2 inch hail relayed by broadcast media via social media. Time estimated via radar.

Apr 5, 2010 · 1.75 in (golf ball) · Knoxville (0 mi from Knoxville)

Tornadoes within 10 miles of Knoxville

DateRatingWherePath
May 7, 2024EF0Pershing
5 mi from Knoxville		5.0 mi long, 80 yd wide
May 13, 2023EF?Nepas
9 mi from Knoxville		0.3 mi long, 30 yd wide
May 13, 2023EF?Flagler
4 mi from Knoxville		0.5 mi long, 30 yd wide
May 13, 2023EF0Donnelly
5 mi from Knoxville		0.9 mi long, 50 yd wide
May 13, 2023EF0Flagler
6 mi from Knoxville		0.5 mi long, 50 yd wide
May 13, 2023EF0Durham
8 mi from Knoxville		0.7 mi long, 40 yd wide
Mar 6, 2017EF1Nepas
10 mi from Knoxville		5.3 mi long, 120 yd wide
Mar 6, 2017EF1Donnelly
5 mi from Knoxville		6.8 mi long, 80 yd wide
Nov 11, 2015EF1Knoxville Airport
2 mi from Knoxville		4.4 mi long, 100 yd wide
May 30, 2008EF2Columbia
6 mi from Knoxville		12.3 mi long, 900 yd wide
Jun 7, 2007EF0Columbia
6 mi from Knoxville		0.2 mi long, 30 yd wide

Damaging thunderstorm winds near Knoxville

104 reports of damaging thunderstorm wind within 10 miles of Knoxville since 2006, on 54 days. The strongest measured gust was 74 mph on Jul 25, 2012.

DateStrongest gustWhereSource
Jul 20, 2026damage reportedPleasantville
2 wind reports		NWS storm report (preliminary)
Jul 4, 202662 mph, measuredKnoxville
1 wind report		NWS storm report (preliminary)
Mar 14, 202570 mph, estimatedKnoxville
1 wind report		NOAA Storm Events
Jul 30, 202463 mph, estimatedHarvey, Pella Muni Airport
2 wind reports		NOAA Storm Events
Jul 15, 202470 mph, estimatedPella Muni Airport
1 wind report		NOAA Storm Events
May 24, 202458 mph, measuredPleasantville, Pershing, Pella Muni Airport
3 wind reports		NOAA Storm Events
May 19, 202461 mph, measuredPella Muni Airport
1 wind report		NOAA Storm Events
Mar 31, 202355 mph, estimatedKnoxville
1 wind report		NOAA Storm Events
Dec 15, 202164 mph, measuredKnoxville Airport, Pella Muni Airport
2 wind reports		NOAA Storm Events
Aug 10, 202158 mph, estimatedLake Red Rock
2 wind reports		NOAA Storm Events

Severe thunderstorm wind means gusts of 58 mph or more, or wind that caused damage. Measured gusts come from weather stations; estimated ones from spotters and damage surveys.

Filing a roof or car hail claim?

Insurers ask for the date of loss. The dates on this page are when hail was reported near Knoxville; hail can hit one street and miss the next, so a report is not proof of damage at your address. A licensed roofer or your insurance adjuster can inspect the roof. Many policies set a time limit for filing a claim — check yours.

Nearby cities

Data: NOAA NCEI Storm Events Database (final records through Jun 30, 2026) and National Weather Service Local Storm Reports (preliminary, since then). Distances are measured from the center of Knoxville.

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