Hail history for Park County, WY

Park County has 65 recorded hail events in the NOAA Storm Events Database — 36 of them 1″ or larger and 2 at 2″ or larger. The largest on record: 2.0″ (hen egg) on July 18, 1997.

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 65 since 1955

1″ or larger 36 NWS severe threshold

2″ or larger 2 hen egg class and up

Largest recorded 2.0″ hen egg · July 18, 1997

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 65 recorded events · data through April 2026
Date	Size	Comparable to
July 18, 2025	0.75″	Penny
June 1, 2025	1.0″	Quarter
April 27, 2025	1.0″	Quarter
May 26, 2023	1.0″	Quarter
May 25, 2023	1.75″	Golf ball
June 7, 2022	0.88″	Nickel
June 6, 2019	0.75″	Penny
May 16, 2019	0.88″	Nickel

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).

June 1, 2025 · 1.0″ (quarter)

At Mammoth, quarter size hail was reported.

May 25, 2023 · 1.75″ (golf ball)

Trained spotters reported golf ball-sized to lime-sized hail in the vicinity of Meeteetse, WY. Several people reported damaged skylights and cracked windshields from the hail.

May 18, 1994 · 1.75″ (golf ball)

A lightning and hail storm left 380 homes in Park County without electricity for several hours. Workers were pelted with golf ball-size hail as they tried to restore power.

Events by decade

1950s	1960s	1970s	1980s	1990s	2000s	2010s	2020s
1	1	4	5	12	14	22	6

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 — 65 hail events have been recorded for Park County, WY in the NOAA Storm Events Database since 1955, including 36 of 1″ (quarter size) or larger.

When did it last hail in Park County?

The most recent recorded hail event for Park County, WY is July 18, 2025, with 0.75″ (penny) 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?

2.0″ (hen egg), recorded on July 18, 1997. 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 Wyoming hail history

All 23 Wyoming 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.