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Hail in Rock County, Minnesota
138 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.
Rock County, Minnesota, has 138 hail events in the NCEI record since 1950, with at least one in 37 different years.
June is the busiest month, with 40 of the recorded events. The last 20 years account for 60 events against 72 in the 20 years before, a change that reflects reporting practice as much as weather.
The county holds 0.9% of the 15,756 hail events recorded in Minnesota; its 28.6 per 100 square miles compares with 19.8 statewide.
22 of the hail reports with a recorded size were golf-ball size (1.75 inches) or larger; the largest recorded stone was 4.00 inches (softball size).
Compared with Minnesota
| Measure | Rock County | Minnesota | US |
|---|---|---|---|
| Hail events since 1950 | 138 | 15,756 | 424,356 |
| Per 100 square miles | 28.6 | 19.8 | 12.0 |
| Per 10,000 residents | 142.6 | 27.6 | 12.8 |
| Deaths recorded | 0 | 0 | 29 |
| Busiest month | June | June | May |
By year
Seasonality
0Feb
0Mar
1Apr
14May
22Jun
40Jul
33Aug
19Sep
5Oct
2Nov
2Dec
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 138 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 |
|---|---|---|---|---|---|---|---|
| 17 May 2026 | Hail | 1.25 in | — | — | — | — | County |
| 13 Apr 2026 | Hail | 1.50 in | — | — | — | — | County |
| 21 Sep 2025 | Hail | 1.00 in | — | — | — | — | County |
| 21 Sep 2025 | Hail | 1.00 in | — | — | — | — | County |
| 21 Sep 2025 | Hail | 1.25 in | — | — | — | — | County |
| 28 Apr 2025 | Hail | 1.00 in | — | — | — | — | County |
| 28 Apr 2025 | Hail | 2.00 in | — | — | — | — | County |
| 28 Apr 2025 | Hail | 2.75 in | — | — | — | — | County |
| 26 Jul 2023 | Hail | 1.00 in | — | — | — | — | County |
| 13 Jul 2023 | Hail | 0.88 in | — | — | — | — | County |
| 13 Jul 2023 | Hail | 2.50 in | — | — | — | — | County |
| 29 May 2022 | Hail | 1.00 in | — | $157K | — | — | County |
| 28 Aug 2021 | Hail | 1.00 in | — | — | — | — | County |
| 28 Aug 2021 | Hail | 1.75 in | — | — | — | — | County |
| 22 Aug 2021 | Hail | 1.00 in | — | — | — | — | County |
| 24 Jun 2019 | Hail | 1.25 in | — | — | — | — | County |
| 12 Jun 2017 | Hail | 0.75 in | — | — | — | — | County |
| 10 Jul 2016 | Hail | 0.75 in | — | — | — | — | County |
| 10 Jul 2016 | Hail | 0.88 in | — | — | — | — | County |
| 10 Jul 2016 | Hail | 1.75 in | — | — | — | — | County |
| 10 Jul 2016 | Hail | 0.88 in | — | — | — | — | County |
| 19 Jun 2015 | Hail | 1.00 in | — | — | — | — | County |
| 12 Apr 2015 | Hail | 0.75 in | — | — | — | — | County |
| 7 Apr 2015 | Hail | 1.00 in | — | — | — | — | County |
| 7 Apr 2015 | Hail | 0.88 in | — | — | — | — | County |
| 24 Jul 2014 | Hail | 0.88 in | — | — | — | — | County |
| 16 Jun 2014 | Hail | 1.00 in | — | — | — | — | County |
| 16 Jun 2014 | Hail | 1.75 in | — | — | — | — | County |
| 5 Jun 2014 | Hail | 1.75 in | — | — | — | — | County |
| 5 Jun 2014 | Hail | 1.00 in | — | — | — | — | County |
| 8 May 2014 | Hail | 1.00 in | — | — | — | — | County |
| 31 Aug 2013 | Hail | 1.00 in | — | — | — | — | County |
| 22 Jun 2013 | Hail | 0.88 in | — | — | — | — | County |
| 22 Jun 2013 | Hail | 1.00 in | — | — | — | — | County |
| 30 May 2013 | Hail | 0.75 in | — | — | — | — | County |
| 23 Aug 2012 | Hail | 0.75 in | — | — | — | — | County |
| 23 Aug 2012 | Hail | 1.00 in | — | — | — | — | County |
| 23 Aug 2012 | Hail | 1.00 in | — | — | — | — | County |
| 23 Aug 2012 | Hail | 1.00 in | — | — | — | — | County |
| 23 Aug 2012 | Hail | 1.00 in | — | — | — | — | County |
| 23 Aug 2012 | Hail | 0.75 in | — | — | — | — | County |
| 23 Aug 2012 | Hail | 1.25 in | — | — | — | — | County |
| 5 May 2012 | Hail | 0.75 in | — | — | — | — | County |
| 5 May 2012 | Hail | 1.00 in | — | — | — | — | County |
| 1 May 2012 | Hail | 1.00 in | — | — | — | — | County |
| 22 Aug 2011 | Hail | 1.00 in | — | — | — | — | County |
| 14 Jun 2011 | Hail | 1.00 in | — | — | — | — | County |
| 21 May 2011 | Hail | 1.00 in | — | — | — | — | County |
| 22 Sep 2010 | Hail | 0.75 in | — | — | — | — | County |
| 12 Apr 2010 | Hail | 1.00 in | — | — | — | — | County |
| 19 Jun 2009 | Hail | 0.88 in | — | — | — | — | County |
| 19 Jun 2009 | Hail | 0.75 in | — | — | — | — | County |
| 13 Aug 2008 | Hail | 1.00 in | — | — | — | — | County |
| 19 Jul 2008 | Hail | 0.75 in | — | — | — | — | County |
| 17 Jul 2008 | Hail | 0.88 in | — | — | — | — | County |
| 6 May 2008 | Hail | 0.75 in | — | — | — | — | County |
| 6 Oct 2007 | Hail | 0.75 in | — | — | — | — | County |
| 5 Oct 2007 | Hail | 0.75 in | — | — | — | — | County |
| 19 May 2007 | Hail | 0.88 in | — | — | — | — | County |
| 8 May 2007 | Hail | 0.75 in | — | — | — | — | County |
| 24 Jun 2006 | Hail | 0.88 in | — | — | — | — | County |
| 24 Jun 2006 | Hail | 0.88 in | — | — | — | — | County |
| 20 Jun 2006 | Hail | 1.75 in | — | — | — | — | County |
| 12 Nov 2005 | Hail | 0.75 in | — | — | — | — | County |
| 12 Nov 2005 | Hail | 0.75 in | — | — | — | — | County |
| 3 Aug 2005 | Hail | 0.88 in | — | — | — | — | County |
| 11 Jul 2005 | Hail | 1.00 in | — | — | — | — | County |
| 29 Jun 2005 | Hail | 1.00 in | — | — | — | — | County |
| 29 Jun 2005 | Hail | 1.75 in | — | — | — | — | County |
| 29 Jun 2005 | Hail | 1.50 in | — | — | — | — | County |
| 20 Jun 2005 | Hail | 0.75 in | — | — | — | — | County |
| 20 Jun 2005 | Hail | 0.75 in | — | — | — | — | County |
| 13 Jun 2005 | Hail | 0.75 in | — | — | — | — | County |
| 8 May 2005 | Hail | 1.00 in | — | — | — | — | County |
| 7 May 2005 | Hail | 0.88 in | — | — | — | — | County |
| 6 May 2005 | Hail | 0.75 in | — | — | — | — | County |
| 17 Apr 2005 | Hail | 1.00 in | — | — | — | — | County |
| 10 Apr 2005 | Hail | 0.88 in | — | — | — | — | County |
| 31 Jul 2004 | Hail | 0.75 in | — | — | — | — | County |
| 31 Jul 2004 | Hail | 0.88 in | — | — | — | — | County |
| 12 Jul 2004 | Hail | 1.75 in | — | — | — | — | County |
| 12 Jul 2004 | Hail | 0.88 in | — | — | — | — | County |
| 12 Jul 2004 | Hail | 0.88 in | — | — | — | — | County |
| 29 May 2004 | Hail | 0.88 in | — | — | — | — | County |
| 26 May 2004 | Hail | 1.75 in | — | — | — | — | County |
| 26 May 2004 | Hail | 0.75 in | — | — | — | — | County |
| 26 May 2004 | Hail | 0.88 in | — | — | — | — | County |
| 26 May 2004 | Hail | 0.88 in | — | — | — | — | County |
| 26 May 2004 | Hail | 0.75 in | — | — | — | — | County |
| 26 May 2004 | Hail | 0.75 in | — | — | — | — | County |
| 26 May 2004 | Hail | 0.88 in | — | — | — | — | County |
| 18 Apr 2004 | Hail | 0.75 in | — | — | — | — | County |
| 18 Apr 2004 | Hail | 0.75 in | — | — | — | — | County |
| 20 Jul 2003 | Hail | 0.75 in | — | — | — | — | County |
| 20 Jul 2003 | Hail | 1.50 in | — | — | — | — | County |
| 20 Jul 2003 | Hail | 0.75 in | — | — | — | — | County |
| 24 Jun 2003 | Hail | 2.00 in | — | — | — | — | County |
| 18 Sep 2002 | Hail | 0.75 in | — | — | — | — | County |
| 16 Aug 2002 | Hail | 0.75 in | — | — | — | — | County |
| 12 Aug 2002 | Hail | 0.75 in | — | — | — | — | County |
| 13 Apr 2002 | Hail | 0.75 in | — | — | — | — | County |
| 13 Apr 2002 | Hail | 0.75 in | — | — | — | — | County |
| 13 Jun 2001 | Hail | 1.00 in | — | — | — | — | County |
| 12 Jun 2001 | Hail | 1.00 in | — | — | — | — | County |
| 12 Jun 2001 | Hail | 1.00 in | — | — | — | — | County |
| 12 Jun 2001 | Hail | 1.00 in | — | — | — | — | County |
| 12 Jun 2001 | Hail | 1.00 in | — | — | — | — | County |
| 12 Jun 2001 | Hail | 1.75 in | — | — | — | — | County |
| 7 Aug 2000 | Hail | 1.00 in | — | — | — | — | County |
| 11 Jul 2000 | Hail | 0.75 in | — | — | — | — | County |
| 23 Jul 1999 | Hail | 0.75 in | — | — | — | — | County |
| 2 Jul 1998 | Hail | 0.75 in | — | — | — | — | County |
| 2 Jul 1998 | Hail | 1.00 in | — | — | — | — | County |
| 27 Jun 1998 | Hail | 1.00 in | — | — | — | — | County |
| 27 Jun 1998 | Hail | 1.00 in | — | — | — | — | County |
| 23 Jun 1998 | Hail | 0.75 in | — | — | — | — | County |
| 29 Mar 1998 | Hail | 1.50 in | — | — | — | — | County |
| 13 Jul 1997 | Hail | 0.75 in | — | — | — | — | County |
| 13 Jul 1997 | Hail | 1.75 in | — | — | — | — | County |
| 13 Jul 1997 | Hail | 0.75 in | — | — | — | — | County |
| 6 Aug 1996 | Hail | 0.75 in | — | — | — | — | County |
| 1 Jul 1996 | Hail | 1.00 in | — | — | — | — | County |
| 1 Jul 1996 | Hail | 0.75 in | — | — | — | — | County |
| 1 Jul 1996 | Hail | 1.75 in | — | — | — | — | County |
| 19 Jun 1996 | Hail | 0.75 in | — | — | — | — | County |
| 19 Jun 1996 | Hail | 0.75 in | — | — | — | — | County |
| 19 Jun 1996 | Hail | 1.75 in | — | — | — | — | County |
| 25 Jul 1995 | Hail | 1.00 in | — | — | — | — | County |
| 14 Jul 1995 | Hail | 0.75 in | — | — | — | — | County |
| 12 Jun 1994 | Hail | 4.00 in | — | — | — | — | County |
| 6 Jun 1994 | Hail | 0.75 in | — | — | — | — | County |
| 2 Aug 1988 | Hail | 1.75 in | — | — | — | — | County |
| 21 Jun 1986 | Hail | 1.00 in | — | — | — | — | County |
| 6 Jul 1982 | Hail | 1.75 in | — | — | — | — | County |
| 13 Jun 1981 | Hail | 1.75 in | — | — | — | — | County |
| 21 Jul 1979 | Hail | 2.00 in | — | — | — | — | County |
| 17 Jun 1968 | Hail | 1.75 in | — | — | — | — | County |
| 29 Jun 1956 | Hail | 0.00 in | — | — | — | — | County |
Questions and answers
How many hail events has Rock County had?
138 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 Rock County?
17 May 2026 (Hail, 1.25 in). Records reach NCEI about 120 days after the month ends.
What was the most damaging hail event recorded in Rock County?
The hail of 29 May 2022, with property damage estimated by NCEI at $0 and crop damage at $157K.
How does Rock County compare with Minnesota for hail?
28.6 events per 100 square miles against 19.8 statewide; the county holds 138 of the state's 15,756 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.