Hail history for Park County, MT

Park County has 58 recorded hail events in the NOAA Storm Events Database — 31 of them 1″ or larger. The largest on record: 1.75″ (golf ball) on July 28, 2023.

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 58 since 1955

1″ or larger 31 NWS severe threshold

2″ or larger 0 hen egg class and up

Largest recorded 1.75″ golf ball · July 28, 2023

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 Park County

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

Most recent recorded events

Latest 8 of 58 recorded events · data through April 2026
Date	Size	Comparable to
July 29, 2025	1.25″	Half dollar
July 28, 2023	1.75″	Golf ball
July 3, 2022	0.75″	Penny
June 4, 2021	1.0″	Quarter
July 7, 2020	0.75″	Penny
August 11, 2019	1.0″	Quarter
July 7, 2019	0.88″	Nickel
May 26, 2019	1.0″	Quarter

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

From the storm reports

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

July 29, 2025 · 1.25″ (half dollar)

Report from coop residence.

July 10, 2017 · 1.5″ (ping-pong ball)

The hail size ranged from pea to ping pong ball size over a 30 minute period. The observer is located at approximately 5000 feet elevation.

June 30, 2010 · 1.5″ (ping-pong ball)

Broken windows were reported.

Events by decade

1950s	1960s	1970s	1980s	1990s	2000s	2010s	2020s
1	2	2	0	6	16	26	5

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 Park County

Has it ever hailed in Park County?

Yes — 58 hail events have been recorded for Park County, MT in the NOAA Storm Events Database since 1955, including 31 of 1″ (quarter size) or larger.

When did it last hail in Park County?

The most recent recorded hail event for Park County, MT is July 29, 2025, with 1.25″ (half dollar) 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 Park County?

1.75″ (golf ball), recorded on July 28, 2023. 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.