Hail History

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Hail history for Cascade County, MT

Last hail in the countySep 13, 20261 in (quarter)
Hail days, last 12 months4
Largest hail since 20063 in (tea cup)Jul 7, 2022
Hail days since 200655
Days with hail 1 inch or larger51
Damaging wind reports in the county194

140 hail reports in Cascade County since 2006 on 55 days. The largest stones measured 3 in (tea cup) on Jul 7, 2022.

Cities in Cascade County

Recent hail in Cascade County

DateHail sizeWhereSource
Sep 13, 20261 in
quarter		Monarch
3 hail reports		NWS storm report (preliminary)
Aug 26, 20260.4 inCascade
1 hail report		NWS storm report (preliminary)
Aug 18, 20260.25 in
pea		Ulm
1 hail report		NWS storm report (preliminary)
Jul 8, 20260.5 in
marble		Great Falls
1 hail report		NWS storm report (preliminary)
Jul 31, 20251 in
quarter		Great Falls
1 hail report		NOAA Storm Events
Jul 29, 20251 in
quarter		Campsite
1 hail report		NOAA Storm Events
Jul 28, 20251 in
quarter		Campsite
1 hail report		NOAA Storm Events
Jun 15, 20251 in
quarter		Ashuelot, Great Falls, Portage
10 hail reports		NOAA Storm Events

One row per day: the largest hail reported in the county that day, the places and the number of reports.

Hail days in Cascade County by year

06407108109102111129136141561641718519120121222323124425426

When hail season peaks in Cascade County

JanFebMarApr7May20Jun15Jul9Aug4SepOctNovDec

Damaging thunderstorm winds in Cascade County

194 reports of damaging thunderstorm wind in Cascade County since 2006, on 74 days. The strongest measured gust was 83 mph on Sep 2, 2026.

DateStrongest gustWhereSource
Sep 25, 202652 mph, measuredMalmstrom AFB
1 wind report		NWS storm report (preliminary)
Sep 2, 202683 mph, measuredGreat Falls, Belt, Sun River
15 wind reports		NWS storm report (preliminary)
Aug 27, 202662 mph, estimatedBelt, Sun Prairie
3 wind reports		NWS storm report (preliminary)
Aug 26, 202652 mph, measuredUlm, Fort Shaw
2 wind reports		NWS storm report (preliminary)
Aug 18, 202650 mph, measuredMonarch, Ulm
2 wind reports		NWS storm report (preliminary)
Jul 25, 202658 mph, measuredRaynesford
1 wind report		NWS storm report (preliminary)
Jul 18, 202670 mph, measuredGreat Falls, Malmstrom AFB, Craig
4 wind reports		NWS storm report (preliminary)
Jul 17, 202672 mph, measuredUlm, Great Falls
4 wind reports		NWS storm report (preliminary)
Jul 12, 202664 mph, measuredGreat Falls
1 wind report		NWS storm report (preliminary)
May 13, 202669 mph, measuredGreat Falls Airport, Fife, Cascade
8 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 Cascade County; 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.

Data: NOAA NCEI Storm Events Database (final records through Jun 30, 2026) and National Weather Service Local Storm Reports (preliminary, since then).