Glenrock, WY Hail Storm – August 2026

Glenrock, Wyoming saw a concluded hail event on August 15, 2026, producing a peak hail size of 1.84 inches and a compact, radar-detected hail swath across town in the late afternoon.

What Happened

The event began in mid-afternoon and produced a sequence of six NWS severe thunderstorm alerts tied to radar hail signatures. Alerts issued for the Glenrock area were:

• August 15 · 3:01 PM MDT (21:01 UTC) – 1.25-inch hail – detected by NEXRAD dual-polarization radar
• August 15 · 3:50 PM MDT (21:50 UTC) – 1.00-inch hail – detected by NEXRAD dual-polarization radar
• August 15 · 4:26 PM MDT (22:26 UTC) – 1.00-inch hail – detected by NEXRAD dual-polarization radar
• August 15 · 4:36 PM MDT (22:36 UTC) – 1.00-inch hail – detected by NEXRAD dual-polarization radar
• August 15 · 4:45 PM MDT (22:45 UTC) – 1.00-inch hail – detected by NEXRAD dual-polarization radar
• August 15 · 5:48 PM MDT (23:48 UTC) – 1.00-inch hail – detected by NEXRAD dual-polarization radar

Radar signatures show the strongest returns in late afternoon as the storm moved across Glenrock. The sequence indicates a primary hail-producing core near 3:01 PM MDT, followed by repeated 1.0-inch radar detections through early evening. Local storm reports are limited; available evidence is radar-detected hail and the issued NWS warning polygons covering the town and immediate surroundings.

Damage Assessment

Maximum radar-derived hail size reached 1.84 inches within the aggregate storm area. Hail in the 1.0 to 1.25-inch range is prone to produce moderate cosmetic and soft-structure impacts. Expect vehicle body dents, fractured or punctured skylights, and dented metal siding where hail occupancy was high.

A 1.84-inch stone exceeds standard three-tab asphalt shingle impact thresholds used in field assessments. Where roofing materials showed pre-existing wear or mechanical weakening, this size increases the probability of shingle fracture, granule loss, and exposed underlayment. Localized glass damage to unprotected windows and solar panels is possible in the direct swath.

Observed and radar-detected signatures are concentrated over Glenrock proper and nearby corridors identified in the NWS warning area. Field verification is required to map exact loss locations and to separate hail damage from unrelated wear or prior storm impacts.

What Contractors Should Know

Inspect roofs first. Prioritize asphalt shingles, metal panels, and rooftop mechanical equipment within the radar-detected swath. Photograph hail impacts with scale references and capture roof elevations and drainage run paths. For vehicles and exterior materials, document dent patterns and any roof-to-ground transfer damage such as displaced gutters or torn soffit.