Hail history for Niobrara County, WY

Niobrara County has 214 recorded hail events in the NOAA Storm Events Database — 181 of them 1″ or larger and 25 at 2″ or larger. The largest on record: 4.25″ (grapefruit) on July 19, 2020.

Records 1950–present Data through April 2026 Peak month July

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 214 since 1965

1″ or larger 181 NWS severe threshold

2″ or larger 25 hen egg class and up

Largest recorded 4.25″ grapefruit · July 19, 2020

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 Niobrara County

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

Most recent recorded events

Latest 8 of 214 recorded events · data through April 2026
Date	Size	Comparable to
July 6, 2025	1.0″	Quarter
July 6, 2025	2.75″	Baseball
July 17, 2024	1.25″	Half dollar
June 2, 2024	1.0″	Quarter
September 22, 2023	2.25″	Tennis ball
September 22, 2023	2.5″	Tennis ball
September 22, 2023	1.0″	Quarter
July 8, 2023	1.0″	Quarter

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

From the storm reports

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

July 6, 2025 · 2.75″ (baseball)

Emergency manager reports baseball size hail. Multiple reports of broken windows in homes and vehicles.

June 5, 2020 · 2.75″ (baseball)

Observer noted that hail and thunderstorm wind contributed to downed tree limbs on their property.

Events by decade

1950s	1960s	1970s	1980s	1990s	2000s	2010s	2020s
0	4	1	11	17	37	97	47

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 Niobrara County

Has it ever hailed in Niobrara County?

Yes — 214 hail events have been recorded for Niobrara County, WY in the NOAA Storm Events Database since 1965, including 181 of 1″ (quarter size) or larger.

When did it last hail in Niobrara County?

The most recent recorded hail event for Niobrara County, WY is July 6, 2025, with 1.0″ (quarter) 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 Niobrara County?

4.25″ (grapefruit), recorded on July 19, 2020. 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.