Hail history for Campbell County, WY

Campbell County has 580 recorded hail events in the NOAA Storm Events Database — 422 of them 1″ or larger and 40 at 2″ or larger. The largest on record: 4.25″ (grapefruit) on September 8, 2013.

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 580 since 1958

1″ or larger 422 NWS severe threshold

2″ or larger 40 hen egg class and up

Largest recorded 4.25″ grapefruit · September 8, 2013

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 Campbell County

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

Most recent recorded events

Latest 8 of 580 recorded events · data through April 2026
Date	Size	Comparable to
August 6, 2024	0.88″	Nickel
May 29, 2024	1.25″	Half dollar
September 21, 2023	1.0″	Quarter
July 31, 2023	1.5″	Ping-pong ball
July 31, 2023	1.5″	Ping-pong ball
July 30, 2023	1.0″	Quarter
July 17, 2023	1.75″	Golf ball
July 17, 2023	2.0″	Hen egg

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

From the storm reports

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

July 31, 2023 · 1.5″ (ping-pong ball)

The combination of large hail and gusty winds produced some property damage.

July 19, 2010 · 4.25″ (grapefruit)

Hail size ranged from golf ball to softball.

June 25, 2007 · 3.5″ (softball)

Hail broke house windows.

Events by decade

1950s	1960s	1970s	1980s	1990s	2000s	2010s	2020s
3	0	12	6	41	183	251	84

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 Campbell County

Has it ever hailed in Campbell County?

Yes — 580 hail events have been recorded for Campbell County, WY in the NOAA Storm Events Database since 1958, including 422 of 1″ (quarter size) or larger.

When did it last hail in Campbell County?

The most recent recorded hail event for Campbell County, WY is August 6, 2024, with 0.88″ (nickel) 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 Campbell County?

4.25″ (grapefruit), recorded on September 8, 2013. Hail that size is destructive-class and typically damages roofs, vehicles, and siding. 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.