Augusta, MT Hail Storm – July 2026

Augusta, MT experienced a multi-zone hailstorm on July 17, 2026. The event produced four NWS alerts and a peak hail measurement of 2.39 inches.

What Happened

Dual-polarization radar detected hail cells across the Augusta metro beginning in the mid-afternoon and continuing into the early evening. Dual-polarization radar detected 1.55-inch hail at 2:51 PM MDT. A stronger radar return showed 1.75-inch hail at 3:36 PM MDT. The NWS issued a warning at 6:58 PM MDT reporting 0.75-inch hail; that notice is classified as NWS warning only in the record. Dual-polarization radar later detected 1.00-inch hail at 7:26 PM MDT. The sequence produced multiple warning areas over adjacent notification zones and concluded that evening.

Damage Assessment

Radar detections during the event ranged from 0.75 to 1.75 inches in the logged alerts. Hail in the 0.75–1.00 inch range commonly produces surface pitting on painted metal, dents on unprotected vehicles, and cosmetic damage to vinyl and aluminum siding in Augusta neighborhoods. Radar-detected 1.55–1.75 inch hail elevates the risk to asphalt shingle integrity, rooftop flashings, and skylight glazing. Local commercial roofing with lightweight membranes or mechanically fastened panels is at increased risk for seam and fastener damage when sizes exceed one inch.

Roof granule loss and asphalt shingle bruising may accelerate weathering in the months after the event. Vehicle claims in the metro should focus on dent patterns and broken glass consistent with impacts. For glass and fenestration, inspect for star breaks, cracked panes, and frame deformation on south- and west-facing exposures, which saw the highest radar returns. Tie any observed damage to the local address and time window for claims and repair prioritization.

What Contractors Should Know

Prioritize roof and vehicle inspections in areas that received radar-detected returns above one inch. Photograph impacts with a scale and time-stamp each image. Check shingle edges, hip and ridge lines, gutters, and A/C condenser fins for impact signatures. Test suspect roofing materials for brittleness and perform moisture checks beneath compromised coverings before recommending replacements.

Provide itemized estimates that separate emergency tarps and temporary fixes from full replacement work. Record exact addresses and the local NWS warning area that applied at the time of impact. Maintain safety protocols for ladder work and elevated inspections. For precise hail track and point-by-point impact locations, consult the paid Strike Map for the detailed damage zone data.