Madill, OK Hail Storm – September 2026

Madill, OK — September 20, 2026. A late-afternoon severe thunderstorm produced up to 1.54-inch hail across the Madill metro. The multi-zone aggregate storm has concluded.

What Happened

The event began in the mid-afternoon and moved through the Madill area during late afternoon into early evening. Four NWS alerts were issued for the storm sequence around Madill:

• September 20 · 3:42 PM CDT – 1.00-inch hail – NWS warning only.
• September 20 · 5:52 PM CDT – 1.00-inch hail – NWS warning only.
• September 20 · 5:53 PM CDT – 0.75-inch hail (penny, 0.75") – NWS warning only.
• September 20 · 6:21 PM CDT – 1.06-inch hail – dual-polarization radar detection.

Radar and post-event aggregation identify a peak hail size of 1.54 inches within the multi-zone footprint. The 6:21 PM radar detection provides a radar-confirmed echo within the sequence. The other NWS alerts were issued as warning-only products without a corresponding dual-polarization radar detection noted in the alert metadata.

The storm track crossed the Madill metro from southwest to northeast during late afternoon into early evening. All issued alerts and radar detections are included in the multi-zone aggregate report for the storm, which is now concluded.

Damage Assessment

Observed hail sizes ranged from 0.75 inch (penny) to 1.54 inches. A 0.75-inch penny-sized hail is commonly associated with cosmetic damage to vehicle paint and minor shingle granule loss. Hail at 1.00 inch (quarter-sized) increases the likelihood of visible dents to unsecured metal surfaces and accelerated wear on asphalt shingles.

The peak measurement of 1.54 inches exceeds coin-size thresholds and approaches golf-ball dimensions. Hail at this size can dent vehicle body panels, crack soft-surfaced skylights, and bruise or remove granules from three-tab and older laminated roofing shingles. Roofing materials with existing weathering or loss of hail-resistant ratings are more likely to show functional damage after impacts in this size range.

No spotter-verified structural collapse or catastrophic failures are reported in the alert set. Field verification is required to determine whether roof replacement, localized patching, or cosmetic repairs are necessary at specific addresses within the Madill warning area.

What Contractors Should Know

Inspect roofs, vehicles, and exposed equipment within the Madill warning area beginning with a visual survey from the ground and documented close-up photos where safe access exists. For roofs, look for granule loss, shingle bruising (soft spots), split tabs, and displaced flashing. Photograph damage with a clear reference object and note the time and location for claims and estimates. HVAC units, guttering, soft metal trim, and vehicles should be checked for dents, cracked housings, and broken fasteners.