Hail history for Mountrail County, ND

Mountrail County has 188 recorded hail events in the NOAA Storm Events Database — 149 of them 1″ or larger and 16 at 2″ or larger. The largest on record: 4.5″ (grapefruit) on July 6, 1971.

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 188 since 1964

1″ or larger 149 NWS severe threshold

2″ or larger 16 hen egg class and up

Largest recorded 4.5″ grapefruit · July 6, 1971

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 Mountrail County

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

Most recent recorded events

Latest 8 of 188 recorded events · data through April 2026
Date	Size	Comparable to
August 7, 2025	1.0″	Quarter
July 29, 2025	1.0″	Quarter
July 25, 2025	1.0″	Quarter
August 6, 2024	1.25″	Half dollar
July 14, 2024	1.0″	Quarter
July 14, 2024	2.0″	Hen egg
July 12, 2024	1.75″	Golf ball
July 12, 2024	1.0″	Quarter

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

From the storm reports

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

August 23, 2022 · 1.0″ (quarter)

Hail combined with winds gusting to over 70 mph to produce extensive crop damage to lentils, wheat, canola, and corn.

July 31, 2016 · 2.0″ (hen egg)

A slow moving supercell thunderstorm produced hail up to two inches in diameter along with wind gusts to 60 mph in and near the city of New Town.

August 18, 1995 · 2.75″ (baseball)

Fifty-five mph winds also reported.

Events by decade

1950s	1960s	1970s	1980s	1990s	2000s	2010s	2020s
0	4	2	10	22	50	70	30

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 Mountrail County

Has it ever hailed in Mountrail County?

Yes — 188 hail events have been recorded for Mountrail County, ND in the NOAA Storm Events Database since 1964, including 149 of 1″ (quarter size) or larger.

When did it last hail in Mountrail County?

The most recent recorded hail event for Mountrail County, ND is August 7, 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 Mountrail County?

4.5″ (grapefruit), recorded on July 6, 1971. 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 North Dakota hail history

All 53 North Dakota 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.