Grass Range, MT Hail Storm – August 2025

What Happened

A severe hail storm moved through Grass Range, MT, on August 7, 2025, producing 1.5-inch hail in the warning area and continuing with multiple hail alerts through the afternoon and evening. The first verified report came at 3:25 PM MDT, when a spotter estimated pea-size hail with accumulations up to 3 inches deep in a hay field.

By 3:27 PM MDT, spotters were reporting hail up to 1 inch in size. At 3:29 PM MDT, another field report noted a cracked windshield from falling hail. Radar and spotter verification were aligned with the earliest 1.5-inch alert, and dual-polarization radar later supported additional 1.25-inch and 1-inch alerts as the storm progressed.

The alert sequence continued at 3:28 PM MDT and 4:29 PM MDT with 1.25-inch hail confidence from dual-polarization radar. Later alerts at 6:24 PM MDT, 7:30 PM MDT, 7:43 PM MDT, and 8:26 PM MDT kept the storm in the hail category through early evening, with 1-inch hail tied to both radar and spotter verification in the 7:30 PM report.

Damage Assessment

The field reports point to surface impact in and near Grass Range rather than a broad debris event. A hay field took a shallow but noticeable accumulation of small hail. Vehicles in the area were also exposed, with one windshield cracked by falling hail at 3:29 PM MDT. The report of 1-inch hail at 3:27 PM MDT and the earlier 1.5-inch alert show a storm capable of producing damage in a narrow window.

The storm did not need long duration to leave a mark. The sequence of verified reports shows a short stretch of more intense hail around mid-afternoon, followed by additional radar-confirmed hail later in the day. That pattern fits a storm that produced repeated hail cores rather than a single isolated burst.

Grass Range sits in open country, so field exposure matters. Hay, parked vehicles, and exposed roofs in the warning area were the most obvious targets from the reports on hand. The cracked windshield is the clearest documented property impact in this event, and the hay field accumulation shows the storm reached ground level with enough hail to pile up in one location.

What Contractors Should Know

This event favored fast-moving hail checks in and around Grass Range, not a long cleanup stretch centered on one neighborhood. The strongest verified reports came in the mid-afternoon window, but hail alerts continued into the evening. Crews should treat the early reports as the first inspection target and keep watch for delayed customer calls from later in the day.

The documented damage points are limited, but they are concrete. A cracked windshield and hail accumulation in a hay field suggest vehicle, agricultural, and light exterior claims are the first places to look. In rural Montana settings like this, contractors usually find the clearest evidence on parked vehicles, metal trim, shingles, and north-facing or unobstructed surfaces.

Grass Range, MT Hail Storm – August 2025

NWS WARNING AREAS · 45

What Happened

Damage Assessment

What Contractors Should Know

Storm Details

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