Mayer, AZ Hail Storm – September 2026

Mayer, AZ experienced hail on September 13, 2026, with a peak stone of 1.78 inches in diameter. The multi-zone storm produced repeated radar-detected NWS hail alerts from midday into mid-afternoon.

What Happened

The storm developed over the Mayer metro and persisted through early afternoon. Three NWS hail alerts were issued for the event. Alert timing and radar-detected hail sizes:

• 12:45 PM MST — 1.36 inches detected by dual-polarization NEXRAD hail detection.
• 1:13 PM MST — 1.65 inches detected by dual-polarization NEXRAD hail detection.
• 3:16 PM MST — 1.11 inches detected by dual-polarization NEXRAD hail detection.

Storm coverage was multi-zone, producing separate hail signatures on sequential radar scans as cells propagated across the area. Radar returns consistently indicated solid hail cores during each alert window. The event is concluded.

Damage Assessment

Observed hail sizes in Mayer ranged from about 1.1 inches to a peak of 1.78 inches. A 1.78-inch stone is slightly larger than a golf ball (1.75 inches). Hail in the 1.1–1.65 inch band commonly produces vehicle panel dents, broken skylights, and localized asphalt shingle damage when exposure is direct. The largest stones recorded near the peak may produce deeper dents in metal roofing and lead to cracked polycarbonate or glass in exposed fixtures.

Damage patterns from this event are likely to be patchy because the storm produced multiple discrete cores rather than a continuous long-track swath. Expect variability across properties in the Mayer warning area. Roof granule loss, gutter deformation, and denting to HVAC covers are consistent with the reported size range and timing of the alerts during midday and mid-afternoon.

What Contractors Should Know

Prioritize safety and documentation. Conduct initial exterior surveys from the ground for loose debris, cracked glazing, and visible roofing defects. Use time-stamped photos with location tags. Avoid immediate roof climbs on wet or wind-exposed surfaces. When roofs are inspected, check for concentrated granule loss along exposed slopes and at hip and ridge intersections. Record representative measurements of dent size and spacing on metal panels and vehicles to support repair estimates.

Triage work by access and exposure. Secure temporary coverings for compromised roofs and broken glazing to prevent water intrusion during any subsequent storms. Estimate repairs by distinguishing isolated impact repairs from larger-area replacements; the multi-core nature of this event increases the chance of isolated damage pockets. Coordinate with property owners and insurers, providing clear photographic evidence tied to local timestamps and positions.

See the Strike Map for the radar-confirmed hail swath and damage zone.