Data current as of 2026-10-16 · Sourced from NOAA Storm Events
Over the past five years, the National Oceanic and Atmospheric Administration has recorded 18 hail storms within 25 miles of Missoula, MT. Of those, 15 produced hail at least quarter-size — the threshold most insurance carriers consider potentially damaging to asphalt shingles. The largest reported hail in this window was egg-sized, which can fracture shingle mat and dent metal flashing on contact. 2022 was the most active year on record locally, with 9 documented hail events.
Check Hail History for a Specific Address in Missoula| Severity | Count | What it means for roofs |
|---|---|---|
| Destructive | 1 event | Egg-size, expect mat fractures and gutter damage |
| Severe | 1 event | Ping pong-size, granule loss and bruising common |
| Significant | 13 events | Quarter-size, the standard insurance damage threshold |
| Moderate | 3 events | Marble-size, possible cosmetic damage |
| Year | Reported Hail Events Within 25 mi |
|---|---|
| 2026 | 4 events |
| 2025 | 2 events |
| 2024 | 3 events |
| 2022 | 9 events |
2022 was the busiest hail year on record locally for Missoula, with 9 documented events inside the 25-mile radius. Storm activity in Missoula typically peaks in spring and early summer, when the jet stream pushes Gulf moisture into the area and supercell thunderstorms become more frequent.
| Date | Location | Severity | Size | NOAA Comments |
|---|---|---|---|---|
| 2026-08-14 | Huson, MT | Moderate | 0.50" | — |
| 2026-05-28 | Turah, MT | Moderate | 0.88" | — |
| 2026-05-28 | CLINTON ELIOTT ARPT, MT | Significant | 1.00" | — |
| 2026-04-01 | 3 NNE Stevensville, MT | Moderate | 0.70" | Wind gusts estimated at 40 mph. |
| 2025-07-31 | GRASS VLY, MT | Significant | 1.00" | A slow-moving thunderstorm impacted the area northwest of Missoula, producing both large hail and heavy, localized rainfall. Quarter-sized (1.00 inch) hail was estimated via photos near the Frenchtown Mill. The storm's torrential downpour resulted in an official measurement of 0.92 inches at the Missoula International Airport (KMSO), with radar estimating up to 1.40 inches nearby. This intense rainfall overwhelmed drainage systems on Broadway, causing water to flood the eastbound lane. A downed tree was reported on the northbound lane of Highway 83 near milepost 31, north of Summit Lake. |
| 2025-07-31 | CARLTON, MT | Significant | 1.25" | Hail estimated slightly over one inch in diameter was reported in Lolo, an event confirmed by at least two separate photos submitted by local residents. |
| 2024-08-19 | HUSON, MT | Significant | 1.00" | An NWS employee measured 1 inch hail near Frenchtown. |
| 2024-08-06 | (MSO)MISSOULA INTL A, MT | Significant | 1.00" | An NWS employee reported one inch hail in Missoula. |
| 2024-08-06 | FRENCHTOWN, MT | Significant | 1.00" | An NWS employee reported one inch hail in Frenchtown at 17:04 MST. |
| 2022-07-09 | CLINTON, MT | Significant | 1.00" | One inch hail was reported from a storm that had a relatively small core of 55-60 dbz returns. There were no damage reports from this event. |
| 2022-07-08 | CLINTON, MT | Significant | 1.00" | There were two reports of 1 hail near Clinton, followed by another near US-200 2 miles from Potomac, MT. |
| 2022-07-08 | POTOMAC, MT | Significant | 1.00" | — |
| 2022-07-08 | FRENCHTOWN, MT | Destructive | 2.50" | A member of the public sent in a photo demonstrating 1.25 hail. Hail around 2.5 was reported by an employee of the NWS near Wye, MT. |
| 2022-07-07 | CARLTON, MT | Significant | 1.00" | One inch hail was reported on the 'eastside' of Florence, MT. |
| 2022-07-07 | STEVENSVILLE CO ARPT, MT | Severe | 1.50" | Local reports between Stevensville and Florence, MT varied between 1 to 1.50 for hail size, with damage to cars, trees, and at least one garden. Damage to trees, and a barn blown over in Stevensville, suggested estimated wind gusts to near 70 mph emanating from the storm. |
| 2022-06-18 | POTOMAC, MT | Significant | 1.25" | A Facebook report of half dollar size hail just west of Potomac. |
| 2022-06-18 | MISSOULA, MT | Significant | 1.00" | Quarter size hail in the Rattlesnake area to the northeast of Missoula. |
| 2022-06-18 | SOUTHERN CROSS, MT | Significant | 1.00" | A Facebook report of 1.00 inch hail in Arlee. |
NOAA has recorded 27 high-wind events within 25 miles of Missoula, MT in the past five years. Of those, 19 reached severe-thunderstorm thresholds (58+ mph). The highest measured gust was 75 mph.
| Severity | Count |
|---|---|
| Severe | 4 events |
| Significant | 15 events |
| Moderate | 8 events |
| Date | Location | Gust (mph) | Severity | NOAA Comments |
|---|---|---|---|---|
| 2026-09-26 | 2 SE East Missoula, MT | 56 | Significant | — |
| 2026-09-25 | 6 NW Missoula, MT | 43 | Moderate | — |
| 2026-09-25 | 3 E Florence, MT | 43 | Moderate | — |
| 2026-09-25 | 1 W Bonner, MT | 45 | Moderate | — |
| 2026-09-25 | 5 E Evaro, MT | 49 | Significant | — |
| 2026-07-24 | 6 NW Missoula, MT | 59 | Significant | Missoula ASOS. |
| 2026-07-24 | 1 W Bonner, MT | 56 | Significant | Mesonet station MTBON Bonner I-90 Mp 110.3. |
| 2026-06-13 | 6 WNW Missoula, MT | 56 | Significant | ASOS station KMSO Missoula, MT. |
| 2026-06-13 | 5 E Evaro, MT | 55 | Significant | Mesonet station PNTM8 Point 6. |
| 2026-05-25 | Quigley, MT | 44 | Moderate | Mesonet station FW8742 Clinton. |
| 2026-05-13 | Frenchtown, MT | 50 | Significant | — |
| 2026-04-07 | 6 WNW Missoula, MT | 48 | Significant | ASOS station KMSO Missoula, MT. |
| 2026-04-07 | 2 ENE Stevensville, MT | 53 | Significant | Mesonet station AV610 Stevensville. |
| 2026-04-07 | 3 NNE Stevensville, MT | 42 | Moderate | Mesonet station STVM8 Stevi. |
| 2026-04-07 | Quigley, MT | 42 | Moderate | Mesonet station FW8742 Clinton. |
| 2026-04-07 | 1 ENE Ninemile, MT | 48 | Significant | Mesonet station MTNNM 0.9 E Ninemile (MT DOT). |
| 2026-04-07 | 1 SW Evaro, MT | 41 | Moderate | Mesonet station MTEVH Evaro Hill Us-93 Mp 5.5. |
| 2026-04-07 | 4 N Ninemile, MT | 40 | Moderate | Mesonet station NINM8 Ninemile Raws. |
| 2026-04-07 | 5 E Evaro, MT | 46 | Significant | Mesonet station PNTM8 Point 6. |
| 2025-07-26 | NAGOS, MT | 55 | Significant | In East Missoula, a wedding tent was collapsed by the winds. Northwest of the Wye, gusts were estimated to be over 50 mph. The University of Montana campus also sustained damage, with several downed trees, one of which fell onto a roof. |
The most recent quarter-size-or-larger hail storm recorded by NOAA within 25 miles of Missoula was on May 28, 2026. HailCheck refreshes from the NOAA Storm Events database daily, so newer events appear here as they are reported.
Missoula averages roughly 4 reported hail events per year within a 25-mile radius. Significant storms (quarter-size or larger) account for 15 of the 18 events recorded over the last five years.
The largest documented hail near Missoula in the last five years was egg-sized. Most Missoula-area hail falls in the marble-to-quarter range, with destructive storms (egg-size or larger) appearing roughly once every few years.
Most homeowners insurance policies in MT cover hail damage to roofs, siding, and gutters under the dwelling and other-structures coverage. Coverage typically requires the damage to be tied to a verifiable storm date — which is where the NOAA hail history above (and a HAAG-style test square validation) becomes important for the claim file.
Use the HailCheck address search to enter any street address in or near Missoula. HailCheck returns every NOAA hail event within a configurable radius, along with severity bands, dates, and storm narratives for Pro members.
If your property in or near Missoula took on hail during one of the storms above, the standard process for documenting damage is a 10×10 foot test square inspection. A HAAG-trained reviewer counts impact indicators — granule displacement, mat fractures, and bruising — within the marked square and produces a PASS or FAIL document for the claim file.
HailCheck offers a $99 photo-based HAAG-style test square validation. You submit photos from the field, our reviewer evaluates the impact indicators and cross-references the NOAA storm dates listed above, and a written PASS/FAIL determination is returned within one business day. We do not send anyone to the roof — the validation is built around the photos you submit.
Learn About $99 HAAG-Style ValidationMissoula sits east of the traditional hail alley, where hail events are less frequent than the central plains but tend to be associated with strong squall lines and tropical systems. Local roof systems are less commonly hardened for hail, which can mean even moderate impacts produce claim-worthy damage.