Capitol, MT Hail Storm – September 2026

Capitol, MT experienced a hailstorm on September 6, 2026, producing maximum hail of 1.44 inches in the late afternoon. The event was short-lived and limited to a single NWS warning area.

What Happened

The primary activity occurred in the late afternoon into early evening on September 6. The National Weather Service issued one severe thunderstorm alert at September 6 · 5:23 PM MDT (23:23 UTC) reporting 1.11" hail detected by dual-polarization radar. Radar-derived hail signatures tracked along a narrow late-afternoon path through the Capitol metro. Ground reports did not expand the alert footprint beyond the single NWS warning area. The storm has concluded.

Damage Assessment

Maximum measured stone diameter reached 1.44" at locations within the affected zone. Hail in the 1.0" to 1.5" range commonly produces denting on metal surfaces and localized damage to asphalt roofing materials. Expect aluminum siding and gutters to show dents and dings where impacts were concentrated along the radar track.

Asphalt shingle roofs in fair to poor condition can exhibit bruising, granule loss, and accelerated wear from impacts of this size. Vehicles parked in the warning area are likely to show panel dents and chipped paint. Skylights, soft-metal flashings, and exposed HVAC housings are other common points of measurable impact for this event.

What Contractors Should Know

Prioritize safety and documentation on initial site visits. Start with a visual roof assessment from the ground and from a safe vantage point. Catalog affected assets with geotagged photos and clear notes on orientation and elevation. Measure representative damage with a ruler or caliper and include a photo scale. Record the presence of bruising, displaced granules, dents in soft metals, and any glass fracture. Note the proximity to the radar-detected track reported at 5:23 PM MDT when mapping inspection locations.

Distinguish cosmetic damage from loss of function before recommending full replacement. Temporary protective measures such as tarps may be appropriate where water intrusion risk exists. For roofing, document shingle loss, cracked tabs, and split seals to support repair recommendations. For siding and vehicles, specify repair versus replace thresholds in your estimate and attach photo evidence tied to location timestamps. Keep reports concise and evidence-based to support client decisions and any insurance processes.

The paid Strike Map shows the radar-confirmed hail swath for Capitol, MT on September 6, 2026.