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Hail in Silver Bow County, Montana
43 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 43 hail events in Silver Bow County, Montana, between 1950 and 2026, spread over 21 years.
August is the busiest month, with 21 of the recorded events. The last 20 years account for 26 events against 11 in the 20 years before, a change that reflects reporting practice as much as weather.
The county holds 0.5% of the 8,391 hail events recorded in Montana; its 6.0 per 100 square miles compares with 5.8 statewide.
4 of the hail reports with a recorded size were golf-ball size (1.75 inches) or larger; the largest recorded stone was 2.50 inches (tennis ball size).
Compared with Montana
| Measure | Silver Bow County | Montana | US |
|---|---|---|---|
| Hail events since 1950 | 43 | 8,391 | 424,356 |
| Per 100 square miles | 6.0 | 5.8 | 12.0 |
| Per 10,000 residents | 12.1 | 76.0 | 12.8 |
| Deaths recorded | 0 | 0 | 29 |
| Busiest month | August | July | May |
By year
Seasonality
0Feb
0Mar
0Apr
0May
2Jun
7Jul
12Aug
21Sep
1Oct
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 43 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 |
|---|---|---|---|---|---|---|---|
| 10 Aug 2019 | Hail | 1.00 in | — | — | — | — | County |
| 10 Aug 2019 | Hail | 1.50 in | — | — | — | — | County |
| 10 Aug 2019 | Hail | 1.00 in | — | — | — | — | County |
| 30 Jul 2019 | Hail | 1.00 in | — | — | — | — | County |
| 16 Jul 2019 | Hail | 1.00 in | — | — | — | — | County |
| 10 Jul 2017 | Hail | 1.00 in | — | — | — | — | County |
| 10 Jul 2017 | Hail | 1.25 in | — | — | — | — | County |
| 10 Jul 2017 | Hail | 1.00 in | — | — | — | — | County |
| 7 Aug 2016 | Hail | 1.25 in | — | — | — | — | County |
| 15 Aug 2014 | Hail | 1.00 in | — | — | — | — | County |
| 23 Jul 2014 | Hail | 1.00 in | — | — | — | — | County |
| 12 Jun 2013 | Hail | 1.00 in | — | — | — | — | County |
| 14 Jul 2011 | Hail | 1.00 in | — | — | — | — | County |
| 6 Aug 2009 | Hail | 0.75 in | — | — | — | — | County |
| 6 Aug 2009 | Hail | 1.75 in | — | — | — | — | County |
| 6 Aug 2009 | Hail | 1.00 in | — | — | — | — | County |
| 6 Aug 2009 | Hail | 2.50 in | — | — | — | — | County |
| 6 Aug 2009 | Hail | 1.00 in | — | — | — | — | County |
| 6 Aug 2009 | Hail | 1.00 in | $500 | — | — | — | County |
| 6 Aug 2009 | Hail | 1.50 in | $5K | — | — | — | County |
| 6 Aug 2009 | Hail | 2.00 in | $50K | — | — | — | County |
| 31 Aug 2008 | Hail | 0.75 in | — | — | — | — | County |
| 31 Aug 2008 | Hail | 0.88 in | — | — | — | — | County |
| 31 Aug 2008 | Hail | 0.75 in | — | — | — | — | County |
| 4 Jul 2008 | Hail | 1.25 in | — | — | — | — | County |
| 10 May 2007 | Hail | 0.88 in | — | — | — | — | County |
| 10 Aug 2005 | Hail | 1.00 in | — | — | — | — | County |
| 8 Aug 2005 | Hail | 0.88 in | — | — | — | — | County |
| 16 Jun 2005 | Hail | 1.75 in | $5K | — | — | — | County |
| 20 May 2004 | Hail | 0.75 in | — | — | — | — | County |
| 7 Aug 2002 | Hail | 0.88 in | — | — | — | — | County |
| 21 Jun 2002 | Hail | 1.00 in | — | — | — | — | County |
| 4 Aug 2001 | Hail | 1.50 in | — | — | — | — | County |
| 19 Jul 1997 | Hail | 1.00 in | — | — | — | — | County |
| 28 Aug 1996 | Hail | 0.75 in | — | — | — | — | County |
| 7 Sep 1995 | Hail | 0.01 in | — | — | — | — | County |
| 18 Jun 1987 | Hail | 1.50 in | — | — | — | — | County |
| 8 Jul 1980 | Hail | 1.25 in | — | — | — | — | County |
| 6 Jun 1976 | Hail | 1.00 in | — | — | — | — | County |
| 9 Jul 1975 | Hail | 1.50 in | — | — | — | — | County |
| 8 Jul 1975 | Hail | 1.00 in | — | — | — | — | County |
| 8 Jun 1958 | Hail | 0.00 in | — | — | — | — | County |
| 8 Jun 1958 | Hail | 0.00 in | — | — | — | — | County |
Questions and answers
How many hail events has Silver Bow County had?
43 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 Silver Bow County?
10 Aug 2019 (Hail, 1.00 in). Records reach NCEI about 120 days after the month ends.
What was the most damaging hail event recorded in Silver Bow County?
The hail of 6 Aug 2009, with property damage estimated by NCEI at $50K.
How does Silver Bow County compare with Montana for hail?
6.0 events per 100 square miles against 5.8 statewide; the county holds 43 of the state's 8,391 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.