Hail history for Colstrip, Montana
NOAA hail reports in and within about 5 km (3 miles) of Colstrip since 1958, with preliminary reports to November 5, 2026.
Readout · Colstrip
- Last hail
- Aug 21, 2024
- 1.00 in, quarter size
- Hail days, last 5 years
- 3
- since Nov 5, 2021 · 3 reports
- Largest ever
- 4.00 in
- grapefruit · Jun 14, 2006
38 reports on 28 days since 1958 · #9 of 111 Montana places
Hail map · Colstrip
- Under 1 in
- 1–1.75 in
- 1.75–2.5 in
- 2.5–4 in
- 4 in +
- No size
For homeowners
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What the record says about Colstrip
The latest hail report in and around Colstrip is from August 21, 2024, 1.00 in (quarter size). Since November 5, 2021 there have been 3 separate hail days; the biggest stones in that time were 1.25 in on July 5, 2022.
Over the 20 years 2006–2025, Colstrip logged 17 reports on 13 hail days, about 0.8 reports a year. That is 89% more than the median Montana town on this site (0.5 a year) and ranks #9 of 111 Montana cities and towns on this site for all-time reports. Colstrip accounts for 11% of the 333 reports filed in Rosebud County.
8% of reports with a size were 2 inches (hen egg) or larger, against 8% for the median Montana town on this site. The largest hail on record here is 4.00 in (grapefruit) on June 14, 2006 near 2 N Colstrip.
Reports held about level in 2016–2025 (8) compared with 2006–2015 (9). The busiest year was 2016, with 4 reports on 2 days. Hail here peaks in June (50% of reports); 66% fall between April and June.
Reports a year 2006–2025 average
- Colstrip 0.8
- Rosebud County 8.3
- Median Montana town on this site 0.5
Hail days 2006–2025
- Colstrip 13
- Rosebud County 74
- Median Montana town on this site 7
Share 2 in or larger of sized reports
- Colstrip 8%
- Rosebud County 9%
- Median Montana town on this site 8%
Hail over time
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Total |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 0 | ||||||||||||
| 2025 | 0 | ||||||||||||
| 2024 | 1 | 1 | 2 | ||||||||||
| 2023 | 0 | ||||||||||||
| 2022 | 1 | 1 | |||||||||||
| 2021 | 0 | ||||||||||||
| 2020 | 0 | ||||||||||||
| 2019 | 0 | ||||||||||||
| 2018 | 1 | 1 | |||||||||||
| 2017 | 0 |
Hail days since Nov 5, 2021
| Date | Reports | Largest | Storm page |
|---|---|---|---|
| Aug 21, 2024 | 1 | 1.00 in | — |
| Jun 27, 2024 | 1 | 1.00 in | — |
| Jul 5, 2022 | 1 | 1.25 in | — |
Largest hail on record
| Date | Size | Location | County | Time · source |
|---|---|---|---|---|
| Jun 14, 2006 | 4.00 ingrapefruit | 2 N Colstrip | Rosebud | 14:47 local · NCEI |
| Jun 16, 1971 | 4.00 ingrapefruit | — | Rosebud | 00:15 local · NCEI |
| May 18, 2014 | 2.75 inbaseball | 1.92 W Colstrip | Rosebud | 18:05 local · NCEI |
| Jun 13, 2016 | 1.75 ingolf ball | 3.17 NW Colstrip | Rosebud | 14:30 local · NCEI |
| Jul 14, 2011 | 1.75 ingolf ball | 1.92 W Colstrip | Rosebud | 18:50 local · NCEI |
Sizes filed before 1996 are often rough estimates (round numbers like 7.00 or 8.00 in) without an exact spot; they are shown as NOAA filed them.
Size of every report
- Under 1 in 10 26%
- 1–2 in 25 66%
- 2 in + 3 8%
Most recent reports
| Date | Size | Location | County | Time · source |
|---|---|---|---|---|
| Aug 21, 2024 | 1.00 inquarter | 2.41 W Colstrip | Rosebud | 18:23 local · NCEI |
| Jun 27, 2024 | 1.00 inquarter | 2.5 WNW Colstrip | Rosebud | 14:00 local · NCEI |
| Jul 5, 2022 | 1.25 inhalf dollar | 2.89 W Colstrip | Rosebud | 03:49 local · NCEI |
| May 23, 2018 | 1.00 inquarter | 2.41 W Colstrip | Rosebud | 15:12 local · NCEI |
| Jul 27, 2016 | 0.75 inpenny | 2.97 WNW Colstrip | Rosebud | 19:53 local · NCEI |
| Jul 27, 2016 | 0.88 innickel | 2.83 NW Colstrip | Rosebud | 19:35 local · NCEI |
| Jun 13, 2016 | 1.75 ingolf ball | 3.17 NW Colstrip | Rosebud | 14:30 local · NCEI |
| Jun 13, 2016 | 1.00 inquarter | 2.41 W Colstrip | Rosebud | 14:30 local · NCEI |
| Jun 24, 2015 | 1.50 inping pong ball | 1.92 W Colstrip | Rosebud | 03:37 local · NCEI |
| Jun 19, 2015 | 1.00 inquarter | 1.92 W Colstrip | Rosebud | 14:00 local · NCEI |
| Jun 19, 2015 | 0.88 innickel | 1.92 W Colstrip | Rosebud | 13:53 local · NCEI |
| May 18, 2014 | 2.75 inbaseball | 1.92 W Colstrip | Rosebud | 18:05 local · NCEI |
Hail history near Colstrip
Questions about hail in Colstrip
How often does it hail in Colstrip, Montana?
38 hail reports have been logged in and within about 5 km (3 miles) of Colstrip since 1958. Over the 20 years 2006–2025 that averages 0.8 reports a year. That ranks #9 of 111 Montana places by number of reports.
When is hail season in Colstrip?
Most reports come in June, July, May. June alone accounts for 50% of all reports.
What is the largest hail recorded in Colstrip?
4.00 in (grapefruit size) on June 14, 2006 near 2 N Colstrip. 8% of reports here were 2 inches or larger.
When did it last hail in Colstrip?
The most recent report in this data is from August 21, 2024 (1.00 in). Final NOAA data runs to July 31, 2026; preliminary NWS reports run to November 5, 2026.
How many hail storms has Colstrip had in the last five years?
3 separate days with hail reports since November 5, 2021, adding up to 3 reports. The most recent was August 21, 2024.
Where does this hail data come from?
Hail reports come from the NOAA NCEI Storm Events Database, which the National Weather Service compiles from spotter, public, law enforcement and media reports. Recent days use preliminary NWS Local Storm Reports via the Iowa Environmental Mesonet until NOAA publishes final data. Only reported hail is counted, so areas with fewer people tend to have fewer reports.