Toston, MT Hail Storm – July 2026

Toston, MT experienced a late-evening thunderstorm on July 23, 2026 that produced up to 1.56-inch hail and prompted an NWS severe thunderstorm warning. The event concluded overnight.

What Happened

A single severe thunderstorm moved through the Toston, MT area late on July 23. The National Weather Service issued one warning at 11:50 PM MDT for 0.75-inch hail within the NWS warning area. The warning was issued on the basis of radar hail signatures and warning criteria rather than confirmed spotter reports. Radar-derived hail signatures were present during the warning window. No active storm is ongoing; the event is concluded.

Damage Assessment

Hail in the observed size range can produce vehicle dents, bruising to asphalt shingles, and localized siding and skylight damage. Roof impacts often present as granular loss and soft-spotting on composite shingles. Metal flashing, vents, and exposed HVAC components are susceptible to dents and perforation when struck by larger stones. Glass breakage is uncommon at these sizes but possible on skylights and older or already-compromised windows.

On vehicles expect cosmetic dents and shattered trim, particularly on horizontal surfaces such as hoods, roofs, and trunks. Exterior soft materials and garden structures may show tearing or punctures. Inspectors should document hail impact patterns across multiple exposures to distinguish pre-existing corrosion or wear from new impact damage.

What Contractors Should Know

Prioritize safety and rapid documentation. Conduct an initial visual survey from ground level to identify obvious roof damage, broken skylights, and clustered vehicle impacts. Photograph all damage with a ruler or common object for scale and include location coordinates or clear address references. Immediately secure any openings with temporary covers to prevent water intrusion. Tarp installations should follow standard fall-protection procedures and local permitting rules.

Schedule detailed rooftop inspections within 48 to 72 hours where safe access is available. Focus on ridge caps, hips, chimneys, plumbing boots, HVAC mounts, and metal flashings. Check attic interiors for daylight penetration and water stains that indicate membrane compromise. For siding and vehicle work, inventory and estimate by exposure band so estimates align with spatial impact patterns. Coordinate with insurance contacts and prepare time-stamped photographic records for claims support.

Purchase the Strike Map for precise hail track and paid-product damage zone data.