Glendive, MT Hail Storm – August 2025

What Happened

A severe hail storm crossed Glendive, Montana, on August 7, 2025, with verified 1-inch hail in the morning hours. The event produced three NWS alerts between 6:16 AM MDT and 7:40 AM MDT, all tied to hail near the 1-inch mark.

The first alert came at 6:16 AM MDT with radar and spotter verification. A second warning followed at 6:42 AM MDT, supported by dual-polarization radar hail detection. The final alert came at 7:40 AM MDT with radar and spotter verification again in place. The warning area stayed active through the early morning as the storm continued to move across the Glendive metro.

Ground reports later added detail from the field. At 8:20 AM MDT, a spotter reported hail lasting about 20 minutes and said the largest stones reached about 2 inches. A second report at the same time described the same hail duration and stone size. At 8:31 AM MDT, another verified report came in from a photo posted on Facebook showing 1-inch hail.

That mix of radar and ground reports points to a storm with a narrow but more intense core embedded in a broader hail swath. The verified reports were not all uniform, and the local observer accounts showed a larger peak than the warning size alone suggested.

Damage Assessment

The field reports point to a hail event with enough duration to cause concentrated exterior impact in parts of Glendive. Twenty minutes of hail is enough to load roofs, dent vehicles, and put repeated strikes on soft metal surfaces. The larger 2-inch spotter report raises the likelihood of isolated higher-end damage where the storm core crossed first.

The reports came in from the same morning window and stayed consistent on timing. The photo-verified 1-inch hail at 8:31 AM MDT supports a broader hail area beyond the largest stones. The earlier spotter accounts suggest the storm may have produced a tighter core of larger stones before easing back to smaller verified hail.

For contractors, the first places to check are typically vehicles left outside, exposed roof slopes, gutters, downspouts, window trim, and south- and west-facing elevations where oblique strikes can show up first. In a storm with both 1-inch verified hail and a 2-inch field report, soft aluminum components and older shingles deserve a closer look than a quick drive-by allows.

Property owners in Glendive should also watch for impacts that do not show from street level. Small bruising on shingles, cracked ridge caps, and fresh dents in fascia or metal vents can appear without major cosmetic loss elsewhere. The field reports from this event suggest a compact hail path, so damage may change quickly from block to block.

What Contractors Should Know

This was a morning storm over the Glendive metro, not a late-day cell spread over a wide region. That timing matters for canvass planning. Roof and exterior inspections should start with the neighborhoods that sat in the storm path during the 6:00 AM to 8:30 AM window, then move outward to nearby streets where the hail core may have clipped only part of a block.