States › North Dakota › Slope County › Hail
Hail in Slope County, North Dakota
96 hail events in the NCEI Storm Events record, 1950 to 2026. Event types counted: Hail.
NCEI notes that Storm Data is compiled from a variety of sources including the National Weather Service, other federal, state and local agencies, the media and the public; that property and crop damage figures are estimates; and that some events are recorded by NWS forecast zone rather than by county. FEMA notes that NFIP claim records are redacted and aggregated to protect the privacy of policyholders. Storm records through 30 Jun 2026.
NCEI records 96 hail events in Slope County, North Dakota, between 1950 and 2026, spread over 34 years.
July is the busiest month, with 44 of the recorded events. The last 20 years account for 54 events against 39 in the 20 years before, a change that reflects reporting practice as much as weather.
The county holds 1% of the 10,026 hail events recorded in North Dakota; its 7.9 per 100 square miles compares with 14.5 statewide.
33 of the hail reports with a recorded size were golf-ball size (1.75 inches) or larger; the largest recorded stone was 4.50 inches (grapefruit size).
Compared with North Dakota
| Measure | Slope County | North Dakota | US |
|---|---|---|---|
| Hail events since 1950 | 96 | 10,026 | 424,356 |
| Per 100 square miles | 7.9 | 14.5 | 12.0 |
| Per 10,000 residents | 1,391.3 | 129.4 | 12.8 |
| Deaths recorded | 0 | 0 | 29 |
| Busiest month | July | July | May |
By year
Seasonality
0Feb
0Mar
0Apr
0May
2Jun
29Jul
44Aug
19Sep
2Oct
0Nov
0Dec
0
Magnitude distribution
NWS hail-size descriptors
- under 1 in
- pea to quarter
- 1–1.74 in
- quarter to golf ball
- 1.75–2.74 in
- golf ball to baseball
- 2.75–3.99 in
- baseball to softball
- 4 in and larger
- softball and larger
Hail size in inches as recorded by NCEI; events without a size are not binned.
Recorded events
All 96 events, most recent first. Magnitude is hail size, tornado rating or wind speed as recorded.
| Date | Event type | Magnitude | Property damage | Crop damage | Deaths | Injuries | Geography |
|---|---|---|---|---|---|---|---|
| 20 Jul 2025 | Hail | 1.00 in | — | — | — | — | County |
| 15 Jun 2024 | Hail | 1.00 in | — | — | — | — | County |
| 2 Jul 2022 | Hail | 0.88 in | — | — | — | — | County |
| 2 Jul 2022 | Hail | 0.88 in | — | — | — | — | County |
| 2 Sep 2021 | Hail | 1.00 in | $2K | — | — | — | County |
| 8 Jul 2021 | Hail | 1.25 in | — | — | — | — | County |
| 8 Jul 2021 | Hail | 1.75 in | — | — | — | — | County |
| 8 Jul 2021 | Hail | 1.75 in | — | — | — | — | County |
| 8 Jul 2021 | Hail | 1.75 in | — | — | — | — | County |
| 2 Jul 2020 | Hail | 0.88 in | — | — | — | — | County |
| 3 Aug 2019 | Hail | 1.00 in | — | — | — | — | County |
| 3 Aug 2019 | Hail | 1.75 in | — | $30K | — | — | County |
| 2 Jul 2019 | Hail | 1.00 in | — | — | — | — | County |
| 2 Jun 2019 | Hail | 0.88 in | — | — | — | — | County |
| 21 Jul 2018 | Hail | 1.75 in | — | — | — | — | County |
| 26 Jun 2018 | Hail | 1.50 in | — | — | — | — | County |
| 20 Jul 2017 | Hail | 1.00 in | — | — | — | — | County |
| 20 Jul 2017 | Hail | 1.00 in | — | — | — | — | County |
| 10 Jul 2017 | Hail | 1.75 in | $25K | — | — | — | County |
| 5 Jun 2017 | Hail | 0.75 in | — | — | — | — | County |
| 10 Jul 2016 | Hail | 1.75 in | $50K | $50K | — | — | County |
| 10 Jul 2016 | Hail | 1.75 in | $125K | $50K | — | — | County |
| 10 Jul 2016 | Hail | 1.50 in | — | — | — | — | County |
| 10 Jul 2016 | Hail | 2.75 in | $150K | $250K | — | — | County |
| 10 Jul 2016 | Hail | 1.00 in | — | — | — | — | County |
| 6 Jul 2016 | Hail | 1.00 in | — | — | — | — | County |
| 6 Jul 2016 | Hail | 1.00 in | — | — | — | — | County |
| 21 Jun 2016 | Hail | 1.00 in | — | — | — | — | County |
| 21 Jun 2016 | Hail | 1.00 in | — | — | — | — | County |
| 16 Jun 2016 | Hail | 1.75 in | — | — | — | — | County |
| 26 Jul 2015 | Hail | 1.00 in | — | — | — | — | County |
| 30 Jun 2015 | Hail | 3.75 in | — | — | — | — | County |
| 30 Jun 2015 | Hail | 0.75 in | — | — | — | — | County |
| 30 Jun 2015 | Hail | 1.00 in | — | — | — | — | County |
| 30 Jun 2015 | Hail | 1.00 in | — | — | — | — | County |
| 22 Jul 2014 | Hail | 1.00 in | — | — | — | — | County |
| 10 Aug 2013 | Hail | 0.75 in | — | — | — | — | County |
| 10 Aug 2013 | Hail | 0.88 in | — | — | — | — | County |
| 8 Jul 2013 | Hail | 1.00 in | — | — | — | — | County |
| 18 May 2013 | Hail | 1.75 in | $25K | — | — | — | County |
| 29 Jun 2012 | Hail | 0.88 in | — | — | — | — | County |
| 31 Aug 2011 | Hail | 1.75 in | $15K | — | — | — | County |
| 15 Aug 2011 | Hail | 0.88 in | — | — | — | — | County |
| 29 Jul 2011 | Hail | 1.75 in | — | — | — | — | County |
| 29 Jul 2011 | Hail | 0.75 in | — | — | — | — | County |
| 24 Jul 2011 | Hail | 1.75 in | — | — | — | — | County |
| 9 Sep 2010 | Hail | 2.00 in | — | — | — | — | County |
| 9 Aug 2010 | Hail | 0.88 in | — | — | — | — | County |
| 9 Aug 2010 | Hail | 1.00 in | — | — | — | — | County |
| 24 Jun 2009 | Hail | 1.00 in | — | — | — | — | County |
| 24 Jun 2009 | Hail | 0.75 in | — | — | — | — | County |
| 15 Jun 2009 | Hail | 1.00 in | — | — | — | — | County |
| 9 Jul 2007 | Hail | 0.75 in | — | — | — | — | County |
| 9 Jul 2007 | Hail | 2.00 in | $5K | — | — | — | County |
| 30 Jun 2006 | Hail | 0.88 in | — | — | — | — | County |
| 21 Jul 2005 | Hail | 2.00 in | — | — | — | — | County |
| 6 Jun 2005 | Hail | 0.75 in | — | — | — | — | County |
| 21 May 2005 | Hail | 1.75 in | — | — | — | — | County |
| 7 Aug 2004 | Hail | 0.88 in | — | — | — | — | County |
| 14 Jul 2004 | Hail | 1.50 in | — | — | — | — | County |
| 17 Jul 2003 | Hail | 0.75 in | — | — | — | — | County |
| 17 Jul 2003 | Hail | 4.50 in | — | — | — | — | County |
| 31 Aug 2002 | Hail | 1.00 in | — | — | — | — | County |
| 25 Aug 2002 | Hail | 0.75 in | — | — | — | — | County |
| 8 Jun 2002 | Hail | 1.50 in | — | — | — | — | County |
| 25 Jul 2001 | Hail | 1.00 in | — | — | — | — | County |
| 25 Jul 2001 | Hail | 1.25 in | — | — | — | — | County |
| 25 Jul 2001 | Hail | 1.75 in | — | — | — | — | County |
| 22 Jul 2001 | Hail | 0.88 in | — | — | — | — | County |
| 27 Jun 2001 | Hail | 0.88 in | — | — | — | — | County |
| 14 Jul 2000 | Hail | 1.75 in | — | — | — | — | County |
| 10 Jul 2000 | Hail | 1.00 in | — | — | — | — | County |
| 3 Jul 2000 | Hail | 1.75 in | — | — | — | — | County |
| 15 Aug 1999 | Hail | 1.00 in | — | — | — | — | County |
| 11 Aug 1999 | Hail | 0.88 in | — | — | — | — | County |
| 20 Jun 1999 | Hail | 0.88 in | — | — | — | — | County |
| 20 Jun 1999 | Hail | 1.00 in | — | — | — | — | County |
| 10 Jul 1997 | Hail | 0.75 in | — | — | — | — | County |
| 22 Jun 1997 | Hail | 0.75 in | — | — | — | — | County |
| 18 Jun 1997 | Hail | 0.75 in | — | — | — | — | County |
| 1 Jun 1997 | Hail | 0.75 in | — | — | — | — | County |
| 2 Aug 1996 | Hail | 1.00 in | — | — | — | — | County |
| 2 Aug 1996 | Hail | 1.75 in | — | — | — | — | County |
| 11 Jun 1996 | Hail | 0.75 in | — | — | — | — | County |
| 12 Aug 1995 | Hail | 1.75 in | — | — | — | — | County |
| 14 Jun 1991 | Hail | 1.75 in | — | — | — | — | County |
| 14 Jun 1991 | Hail | 1.75 in | — | — | — | — | County |
| 8 Jun 1991 | Hail | 1.00 in | — | — | — | — | County |
| 8 Jun 1991 | Hail | 1.00 in | — | — | — | — | County |
| 26 Aug 1990 | Hail | 1.75 in | — | — | — | — | County |
| 26 Jul 1990 | Hail | 1.75 in | — | — | — | — | County |
| 31 Aug 1989 | Hail | 1.75 in | — | — | — | — | County |
| 20 Jul 1987 | Hail | 1.75 in | — | — | — | — | County |
| 17 Jul 1983 | Hail | 4.00 in | — | — | — | — | County |
| 17 Jul 1983 | Hail | 4.00 in | — | — | — | — | County |
| 2 Aug 1981 | Hail | 1.00 in | — | — | — | — | County |
Questions and answers
How many hail events has Slope County had?
96 events in the NCEI Storm Events record between 1950 and 2026. Reporting of hail became far more complete after 1996, so early decades undercount.
When was the last recorded hail event in Slope County?
20 Jul 2025 (Hail, 1.00 in). Records reach NCEI about 120 days after the month ends.
What was the most damaging hail event recorded in Slope County?
The hail of 10 Jul 2016, with property damage estimated by NCEI at $150K and crop damage at $250K.
How does Slope County compare with North Dakota for hail?
7.9 events per 100 square miles against 14.5 statewide; the county holds 96 of the state's 10,026 recorded events.
Provenance
NOAA NCEI Storm Events Database, yearly details files through 30 Jun 2026, public domain. County-recorded events plus zone-recorded events whose forecast zone is named for the county (marked "Forecast zone"). Population and area from the US Census Bureau (2021). Built 1 Oct 2026. See the methodology, the Hail hub and the county page.