Hail history for Malmstrom AFB, Montana
NOAA hail reports in and within about 5 km (3 miles) of Malmstrom AFB since 1958, with preliminary reports to November 3, 2026.
Readout · Malmstrom AFB
- Last hail
- Jul 30, 2023
- 1.25 in, half dollar size
- Hail days, last 5 years
- 1
- since Nov 3, 2021 · 1 report
- Largest ever
- 2.75 in
- baseball · Jul 10, 1965
13 reports on 12 days since 1958 · #77 of 111 Montana places
Hail map · Malmstrom AFB
- 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 Malmstrom AFB
The latest hail report in and around Malmstrom AFB is from July 30, 2023, 1.25 in (half dollar size). Since November 3, 2021 there has been one hail day; the biggest stones in that time were 1.25 in on July 30, 2023.
Over the 20 years 2006–2025, Malmstrom AFB logged 5 reports on 5 hail days, about 0.3 reports a year. That is 44% less than the median Montana town on this site (0.5 a year) and ranks #77 of 111 Montana cities and towns on this site for all-time reports. Malmstrom AFB accounts for 5% of the 256 reports filed in Cascade 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 2.75 in (baseball) on July 10, 1965.
The busiest year was 1985, with 2 reports on 2 days. Hail here peaks in June (46% of reports); 54% fall between April and June.
Reports a year 2006–2025 average
- Malmstrom AFB 0.3
- Cascade County 6.7
- Median Montana town on this site 0.5
Hail days 2006–2025
- Malmstrom AFB 5
- Cascade County 51
- Median Montana town on this site 7
Share 2 in or larger of sized reports
- Malmstrom AFB 8%
- Cascade County 7%
- 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 | 0 | ||||||||||||
| 2023 | 1 | 1 | |||||||||||
| 2022 | 0 | ||||||||||||
| 2021 | 1 | 1 | |||||||||||
| 2020 | 0 | ||||||||||||
| 2019 | 1 | 1 | |||||||||||
| 2018 | 0 | ||||||||||||
| 2017 | 0 |
Hail days since Nov 3, 2021
| Date | Reports | Largest | Storm page |
|---|---|---|---|
| Jul 30, 2023 | 1 | 1.25 in | — |
Largest hail on record
| Date | Size | Location | County | Time · source |
|---|---|---|---|---|
| Jul 10, 1965 | 2.75 inbaseball | — | Cascade | 16:45 local · NCEI |
| Jun 6, 2011 | 1.50 inping pong ball | 8 E Great Falls | Cascade | 15:53 local · NCEI |
| Jun 29, 1978 | 1.50 inping pong ball | — | Cascade | 16:30 local · NCEI |
| Jun 28, 1963 | 1.50 inping pong ball | — | Cascade | 16:43 local · NCEI |
| Jul 30, 2023 | 1.25 inhalf dollar | 0.96 WNW (Gfa)malmstrom Afb | Cascade | 18:47 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 4 31%
- 1–2 in 8 62%
- 2 in + 1 8%
Most recent reports
| Date | Size | Location | County | Time · source |
|---|---|---|---|---|
| Jul 30, 2023 | 1.25 inhalf dollar | 0.96 WNW (Gfa)malmstrom Afb | Cascade | 18:47 local · NCEI |
| Aug 4, 2021 | 1.00 inquarter | 1.4 W (Gfa)malmstrom Afb | Cascade | 17:58 local · NCEI |
| Jun 18, 2019 | 1.00 inquarter | 1.4 W (Gfa)malmstrom Afb | Cascade | 15:15 local · NCEI |
| May 4, 2014 | 1.00 inquarter | 0.47 E (Gfa)malmstrom Afb | Cascade | 15:00 local · NCEI |
| Jun 6, 2011 | 1.50 inping pong ball | 8 E Great Falls | Cascade | 15:53 local · NCEI |
| Jul 5, 1988 | 0.75 inpenny | — | Cascade | 14:49 local · NCEI |
| Aug 27, 1985 | 1.00 inquarter | — | Cascade | 21:30 local · NCEI |
| Aug 8, 1985 | 0.75 inpenny | — | Cascade | 00:50 local · NCEI |
| Jun 29, 1978 | 1.50 inping pong ball | — | Cascade | 16:30 local · NCEI |
| Jul 10, 1965 | 2.75 inbaseball | — | Cascade | 16:45 local · NCEI |
| Jun 28, 1963 | 1.50 inping pong ball | — | Cascade | 16:43 local · NCEI |
| Jun 6, 1958 | 0.75 inpenny | — | Cascade | 18:30 local · NCEI |
Hail history near Malmstrom AFB
- Great Falls 9 km · 65
- Vaughn 29 km · 14
- Sun River 41 km · 12
- Raynesford 43 km · 19
- Monarch 52 km · 12
- Fort Benton 53 km · 10
- Simms 58 km · 10
- Geyser 59 km · 12
Questions about hail in Malmstrom AFB
How often does it hail in Malmstrom AFB, Montana?
13 hail reports have been logged in and within about 5 km (3 miles) of Malmstrom AFB since 1958. Over the 20 years 2006–2025 that averages 0.3 reports a year. That ranks #77 of 111 Montana places by number of reports.
When is hail season in Malmstrom AFB?
Most reports come in June, July, August. June alone accounts for 46% of all reports.
What is the largest hail recorded in Malmstrom AFB?
2.75 in (baseball size) on July 10, 1965. 8% of reports here were 2 inches or larger.
When did it last hail in Malmstrom AFB?
The most recent report in this data is from July 30, 2023 (1.25 in). Final NOAA data runs to July 31, 2026; preliminary NWS reports run to November 3, 2026.
How many hail storms has Malmstrom AFB had in the last five years?
1 separate days with hail reports since November 3, 2021, adding up to 1 reports. The most recent was July 30, 2023.
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.