Roundup, MT Hail Storm – July 2026

Roundup, Montana experienced radar-detected hail on July 7, 2026, producing a peak 2.33-inch stone during the early evening. The event is recorded as a multi-zone aggregate storm that concluded the same night.

What Happened

The storm moved over the Roundup area in the early evening, producing two NWS alerts covering the Roundup alert area. At 6:02 PM MDT the first radar-derived alert flagged hail around 2.22 inches. At 6:37 PM MDT a second radar-derived alert flagged hail near 1.47 inches. Both alerts were based on dual-polarization radar detections. The event status is concluded. No public spotter reports are associated with these alerts in the incident record.

Damage Assessment

Radar-detected hail in the roughly 1.5- to 2.3-inch range can produce localized roofing and vehicle damage in and near Roundup. Stones of about 1.5 inches commonly dent vehicle panels, crack glass in exposed fixtures, and bruise siding. Stones above 2 inches increase the likelihood of fractured asphalt shingles, displaced metal roofing panels, and more severe vehicle body damage.

Damage in this event should be evaluated on a property-by-property basis. Radar detection indicates where hail likely occurred, but ground verification is required to establish individual loss. Claims and repair decisions should reference the local times of the radar alerts when documenting loss or scheduling inspections.

What Contractors Should Know

Inspect roofs first for cracked, split, or missing shingles and for impact patterning consistent with hail struck during the early evening. Prioritize properties with south- and west-facing exposures and vehicles parked outdoors during the alert window. Photograph damage with time-stamped images and note the closest radar alert time used in the report: 6:02 PM MDT and 6:37 PM MDT.

Use temporary watertight measures where shingle granule loss, punctures, or open seams are present. For roofing scopes, consider full-deck assessments on asphalt and metal roofs when hail above 2 inches was detected. Coordinate with insurers using the radar alert times and provide clear, dated evidence for each property. Maintain safety protocols for ladder work and wet surfaces when performing exterior assessments.

Precise hail track data and the associated damage zone mapping are available via the paid Strike Map product.