HailHistory › Hail by county › North Dakota › Sioux County
North Dakota · county FIPS 38085
Hail history for Sioux County, ND
Sioux County has 113 recorded hail events in the NOAA Storm Events Database — 86 of them 1″ or larger and 12 at 2″ or larger. The largest on record: 5.0″ (grapefruit) on July 13, 2010.
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.
When it hails in Sioux County
Recorded events by month, 1950–present. The amber bar marks Sioux County's peak: July.
Most recent recorded events
| Date | Size | Comparable to |
|---|---|---|
| 1.0″ | Quarter | |
| 1.25″ | Half dollar | |
| 1.5″ | Ping-pong ball | |
| 1.75″ | Golf ball | |
| 1.0″ | Quarter | |
| 1.5″ | Ping-pong ball | |
| 1.5″ | Ping-pong ball | |
| 1.75″ | Golf ball |
Looking for a specific storm? Use the did-it-hail date lookup for Sioux County.
From the storm reports
Narratives as filed with the NOAA Storm Events Database (public records; lightly trimmed for length).
· 1.0″ (quarter)
Large amount of one-inch diameter hail caused significant dents on a garage door and shattered a window on a home.
· 4.25″ (grapefruit)
This was the second wave of very large hail to impact Cannon Ball during this episode, resulting in further damage to homes, vehicles, and crops.
· 5.0″ (grapefruit)
A North Dakota state record tying hailstone of five inches in diameter fell at Prairie Knights Casino and Resort. The resort, and all vehicles outside, sustained severe damage from the extreme hail. One of these large hail stones crashed through the windshield of a car, injuring the two occupants. This tied the record size five inch diameter hailstone in Mercer County on August 3, 1969.
Events by decade
| 1950s | 1960s | 1970s | 1980s | 1990s | 2000s | 2010s | 2020s |
|---|---|---|---|---|---|---|---|
| 0 | 0 | 0 | 10 | 6 | 37 | 46 | 14 |
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 Sioux County
Has it ever hailed in Sioux County?
Yes — 113 hail events have been recorded for Sioux County, ND in the NOAA Storm Events Database since 1980, including 86 of 1″ (quarter size) or larger.
When did it last hail in Sioux County?
The most recent recorded hail event for Sioux County, ND is September 12, 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 Sioux County?
5.0″ (grapefruit), recorded on July 13, 2010. 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
- Cass County 494
- Morton County 420
- Grand Forks County 391
- Barnes County 331
- Burleigh County 324
- Benson County 297
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.