Hail History

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Hail history for Denison, IA

Last hail within 10 milesJul 15, 20240.75 in (penny)
Hail days, last 12 monthsNone
Largest hail since 20062.5 in (tennis ball)Jul 15, 2024
Hail days since 200615
Days with hail 1 inch or larger10
Tornadoes within 10 miles3
Damaging wind reports within 10 miles62

Hail has been reported within 10 miles of Denison on 15 days since 2006. The largest stones measured 2.5 in (tennis ball) on Jul 15, 2024. Hail is most common here in May and July.

Recent hail near Denison

No hail was reported within 10 miles of Denison in the last two years.

Hail days near Denison by year

10610710809110211121132141521617218192012122231242526

When hail season peaks near Denison

Of the 15 hail days since 2006, most fell in May (5) and July (4).

JanFebMar1Apr5May1Jun4Jul3Aug1SepOctNovDec

Largest hail storms near Denison

Jul 15, 2024 · 2.5 in (tennis ball) · Vail (8 mi from Denison)

National Weather Service description (English): Forward from broadcast media, with time estimated by radar.

Jul 28, 2008 · 1.75 in (golf ball) · Denison (0 mi from Denison)

National Weather Service description (English): KDSN radio station reported hail up to golf ball size.

Jul 1, 2011 · 1.75 in (golf ball) · Deloit (6 mi from Denison)

May 14, 2018 · 1.25 in (half dollar) · Denison (0 mi from Denison)

Sep 13, 2010 · 1 in (quarter) · Dow City (9 mi from Denison)

Tornadoes within 10 miles of Denison

DateRatingWherePath
Apr 19, 2023EF?Deloit
7 mi from Denison		1.9 mi long, 50 yd wide
Aug 31, 2014EF0Dow City
9 mi from Denison		5.5 mi long, 330 yd wide
May 29, 2008EF1Denison
3 mi from Denison		2.5 mi long, 75 yd wide

Damaging thunderstorm winds near Denison

62 reports of damaging thunderstorm wind within 10 miles of Denison since 2006, on 36 days. The strongest measured gust was 87 mph on May 26, 2016.

DateStrongest gustWhereSource
Mar 14, 202559 mph, measuredDenison Muni Airport
1 wind report		NOAA Storm Events
Aug 5, 202358 mph, estimatedDenison Muni Airport
1 wind report		NOAA Storm Events
Jul 23, 202269 mph, measuredDenison
1 wind report		NOAA Storm Events
Jul 11, 202269 mph, measuredDenison Muni Airport, Denison
2 wind reports		NOAA Storm Events
May 19, 202263 mph, measuredDenison Muni Airport
1 wind report		NOAA Storm Events
Dec 15, 202181 mph, measuredDenison Muni Airport
1 wind report		NOAA Storm Events
Aug 30, 202162 mph, estimatedDeloit
1 wind report		NOAA Storm Events
Aug 28, 202158 mph, estimatedDow City
1 wind report		NOAA Storm Events
Jun 16, 202160 mph, estimatedAstor
1 wind report		NOAA Storm Events
Aug 10, 202064 mph, estimatedBuck Grove, Denison
3 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 Denison; 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 Denison.

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