On 11 Aug 2026, thunderstorms produced hail up to 1.75 in (golf ball) at Blackhawk, SD. 2 hail reports of 1.25 in or larger were logged near Blackhawk centroid, at 2:32 p.m. MDT and 2:34 p.m. MDT. Hail reports clustered around the town centroid but mostly off the tight street grid (SW of the town centroid; W of the town centroid). Largest: 1.75 in at 4 ENE Johnson Siding (2:32 p.m. MDT); 1.50 in at 2 W Black Hawk (2:34 p.m. MDT). This meets HailDataHub in-town qualify (2+ stones ≥1.25 in near the place centroid), not a rural offset or a single-report pin. Storm motion from the timed reports was toward the NNE. Chasers and PDR/roof crews tracking the swath would treat Blackhawk as an in-town hit. Population is 2,934. Not a damage certificate. Not insurance.