Glendo, WY Hail Storm – September 2026

Glendo, Wyoming recorded a severe thunderstorm on September 6, 2026, producing up to 1.57-inch hail in the early evening. The storm concluded after a compact hail core passed through the town.

What Happened

NWS issued a single warning for the Glendo area at 9:17 PM MDT on September 6, citing potential 0.98-inch hail based on dual-polarization NEXRAD hail detection. The warning polygon covered the town and immediate surroundings. Radar data show a focused hail core that moved through Glendo during the early evening period, triggering the NWS alert and producing a concentrated hail signature on dual-polarization returns. No additional NWS alerts were issued for related cells before the event concluded.

Field timing was short. The warning and radar hail signature align to a narrow window in the early evening. Radar returns indicated a compact, high-reflectivity core consistent with hail lofting and melting as it fell. Local emergency communications noted the event as brief and localized to the Glendo corridor.

Damage Assessment

Observed stones were large enough to cause localized damage to exposed surfaces. Stones were roughly between a US quarter and a golf ball in size (quarter = 1.00 inch; golf ball = 1.75 inches). For Glendo properties along the hail path, expect concentrated impact on weathered asphalt shingles, unprotected metal roofing, and parked vehicles.

Likely visible effects include loss of shingle granules, surface bruising on composite roofing, denting on vehicle panels, and minor breakage in vulnerable building elements such as skylights and soft vinyl siding. Solar panels and exposed HVAC condensers in the immediate hail path are at increased risk for pitting and seal damage. No broad reports of structural collapse or widespread catastrophic failure have been recorded in available local communications.

What Contractors Should Know

Prioritize inspections on roofs and parked vehicles located within Glendo�s early evening hail path. Start with photo documentation of pre-existing conditions when available, then document new impact points with geotagged photos and measurements. Inspect roof coverings for granule loss, cracked or split shingles, and crushed sealant at flashings. Check solar arrays, external HVAC equipment, gutters, and siding for pitting, dents, and tears. Measure representative hail impressions with a ruler and record the location relative to public roads or address points.

Triage repairs by urgency. Secure temporary covers for exposed roof penetrations and broken glazing to limit water entry during the next precipitation event. Use tarps and mechanical fasteners rated for local wind conditions. Prepare estimates that separate immediate stabilization from full replacement work. Communicate clearly with property owners and insurers about observed damage and recommended next steps. For mapping of the radar-confirmed hail swath and precise targeting of inspection efforts, see the paid Strike Map for the radar-confirmed hail swath.