Hail history for Mineral County, MT

Mineral County has 14 recorded hail events in the NOAA Storm Events Database — 9 of them 1″ or larger and 1 at 2″ or larger. The largest on record: 2.0″ (hen egg) on July 28, 1970.

Records 1950–present Data through April 2026 Peak month June

Core sample · every recorded event, 1955–2026

Mark size = measured hail diameter; slivers are events with no recorded size. Amber ≥2″, red ≥2.75″ (baseball class). Denser recent decades partly reflect better reporting, not only more storms.

Recorded events 14 since 1970

1″ or larger 9 NWS severe threshold

2″ or larger 1 hen egg class and up

Largest recorded 2.0″ hen egg · July 28, 1970

Read the record honestly: Storm Events contains what was reported to the National Weather Service. Sparse or rural counties under-report, and coverage improved sharply after the mid-1990s — a quiet-looking stretch is not proof nothing fell.

When it hails in Mineral County

Recorded events by month, 1950–present. The amber bar marks Mineral County's peak: June.

Most recent recorded events

Latest 8 of 14 recorded events · data through April 2026
Date	Size	Comparable to
August 10, 2019	1.75″	Golf ball
August 10, 2019	1.75″	Golf ball
June 8, 2016	1.0″	Quarter
May 30, 2015	0.75″	Penny
May 30, 2015	0.88″	Nickel
May 30, 2015	0.5″	Mothball
July 18, 2007	1.75″	Golf ball
July 6, 2006	0.75″	Penny

Looking for a specific storm? Use the did-it-hail date lookup for Mineral County.

From the storm reports

Narratives as filed with the NOAA Storm Events Database (public records; lightly trimmed for length).

August 10, 2019 · 1.75″ (golf ball)

Besides the golf ball-sized hail, the storm produced torrential rain which caused motorists to pull off to the side of Interstate 90.

August 10, 2019 · 1.75″ (golf ball)

Two different reports of golf ball-sized hail in the St. Regis area.

Events by decade

1950s	1960s	1970s	1980s	1990s	2000s	2010s	2020s
0	0	1	0	3	4	6	0

The climb across decades is largely a reporting story: spotter networks, radar, and digital filing pulled far more storms into the record after the 1990s.

Questions about hail in Mineral County

Has it ever hailed in Mineral County?

Yes — 14 hail events have been recorded for Mineral County, MT in the NOAA Storm Events Database since 1970, including 9 of 1″ (quarter size) or larger.

When did it last hail in Mineral County?

The most recent recorded hail event for Mineral County, MT is August 10, 2019, with 1.75″ (golf ball) hail. The database is currently updated through April 2026, so a storm from the last few weeks may not appear yet. To check a specific day, use the did-it-hail date lookup.

What is the largest hail ever recorded in Mineral County?

2.0″ (hen egg), recorded on July 28, 1970. Hail that size meets or exceeds the National Weather Service severe threshold. See how big that really is on the actual-size hail chart.

Does a recorded hail event mean my roof was damaged?

No. This page reports storm records, not damage. Hail size and damage vary block by block within a county, and only an inspection can establish what happened to a specific roof. If you suspect damage, talk to your insurer or a licensed roofer — they can pull the same NOAA records for your claim.

More Montana hail history

All 56 Montana counties, ranked by recorded hail →

Source: NOAA/NCEI Storm Events Database, public domain, updated monthly by NCEI — this site's copy runs through April 2026. HailHistory reports records; it does not give insurance advice or assess damage.