Hail History

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Hail history for Fergus County, MT

Last hail in the countySep 7, 20260.25 in (pea)
Hail days, last 12 months4
Largest hail since 20063 in (tea cup)Sep 6, 2026
Hail days since 200674
Days with hail 1 inch or larger64
Damaging wind reports in the county134

140 hail reports in Fergus County since 2006 on 74 days. The largest stones measured 3 in (tea cup) on Sep 6, 2026.

Cities in Fergus County

Recent hail in Fergus County

DateHail sizeWhereSource
Sep 7, 20260.25 in
pea		Hilger
1 hail report		NWS storm report (preliminary)
Sep 6, 20263 in
tea cup		Hilger, Danvers, Lewistown
5 hail reports		NWS storm report (preliminary)
Jul 5, 20261.5 in
ping pong ball		Winifred, Denton
2 hail reports		NWS storm report (preliminary)
Jul 3, 20261 in
quarter		Forestgrove
1 hail report		NWS storm report (preliminary)
Aug 7, 20251 in
quarter		Grassrange
2 hail reports		NOAA Storm Events
Aug 1, 20252 in
hen egg		Buffalo
1 hail report		NOAA Storm Events
Jul 28, 20252.5 in
tennis ball		Piper
1 hail report		NOAA Storm Events
Jun 15, 20252.5 in
tennis ball		Lewiston Muni Airport, Grassrange, Forestgrove
7 hail reports		NOAA Storm Events
Jun 14, 20251.75 in
golf ball		Ross Fork, Danvers
3 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 Fergus County by year

30610079083093103111124133141531617618519320321222323124525426

When hail season peaks in Fergus County

JanFebMarApr10May26Jun25Jul9Aug4SepOctNovDec

Damaging thunderstorm winds in Fergus County

134 reports of damaging thunderstorm wind in Fergus County since 2006, on 75 days. The strongest measured gust was 116 mph on Jun 10, 2016.

DateStrongest gustWhereSource
Sep 7, 202659 mph, measuredForestgrove, Grass Range
2 wind reports		NWS storm report (preliminary)
Sep 2, 202661 mph, measuredGrass Range
1 wind report		NWS storm report (preliminary)
Aug 23, 202667 mph, estimatedWinifred
1 wind report		NWS storm report (preliminary)
Jul 25, 202661 mph, measuredLewistown
1 wind report		NWS storm report (preliminary)
Jul 14, 202686 mph, measuredForestgrove, Grass Range, Lewistown
6 wind reports		NWS storm report (preliminary)
Jul 12, 202677 mph, measuredGrass Range, Lewistown
3 wind reports		NWS storm report (preliminary)
Jul 5, 202668 mph, measuredForestgrove, Denton, Winifred
6 wind reports		NWS storm report (preliminary)
May 29, 202670 mph, measuredRoy
1 wind report		NOAA Storm Events
May 13, 202677 mph, measuredGrassrange
1 wind report		NOAA Storm Events
Dec 26, 202559 mph, measuredPownal
1 wind report		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 Fergus 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).