Flagstaff, AZ Hail Storm – July 2026

Flagstaff, AZ recorded a hail-producing thunderstorm on July 23, 2026, with maximum confirmed hail of 1.85 inches. The event moved through the Flagstaff metro in the early afternoon and has concluded.

What Happened

The storm developed over the Flagstaff metro and produced peak activity in the early afternoon. The National Weather Service issued a single warning at 1:15 PM MST, citing dual-polarization radar detection of hail to 1.41 inches within the warning area. The warning covered a single metro zone and focused response on the northern and central portions of the Flagstaff urban area.

Radar signatures indicated strong reflectivity with hail cores embedded in the main updraft. The NWS warning was based on dual-polarization radar hail detection. Field reports and additional analyses recorded a larger maximum hail size after the warning period, which produced localized impacts across the metro.

Damage Assessment

Hail in the 1.5–2.0 inch range typically produces automotive and roofing damage in a compact urban setting like Flagstaff. Vehicles parked in open lots and driveways are at risk for panel dents, broken mirrors, and cracked sunroofs. Composite asphalt shingles can experience granule loss, bruising, and the initiation of shingle fractures that shorten service life.

Skylights, roof-mounted HVAC units, gutters, and soffits in exposed locations are susceptible to impact damage. Ground-level damage to vinyl siding and vulnerable trim is likely where hail reached the larger sizes. Fallen debris and stripped foliage were reported in some neighborhoods, increasing the risk of secondary exterior damage.

Document visible damage with date-stamped images showing scale and location. Prioritize photographic coverage of roofing fields, vehicle surfaces, and any penetrations or flashing that show impact marks. Use consistent photo angles and include a measuring reference for each damaged element.

What Contractors Should Know

Safety first. Confirm stability before roof access. Use fall protection and confirm that attic entry checks for active leaks are complete before removing tarps or performing repairs. Initial contractor scopes should focus on roof system integrity, flashings, skylights, rooftop mechanicals, and gutters. For vehicles, document dents and broken glass separately and note VINs where applicable.

Inspect asphalt shingles for granule loss, bruising, and fractured tabs. Where granule loss exposes the mat, plan for replacement rather than localized patching. Check attic and interior ceilings for water stains that indicate existing breaches. Schedule full material orders within 7–10 days to avoid further exposure. Maintain time-stamped photographic logs and GPS-referenced notes for all line items in the estimate.

Consult the Strike Map for the precise hail track and the damage zone.