HIGH STORM RISK  — Bryan sits in a humid subtropical zone where summer heat regularly spikes above 100 F -- the all-time record high reached 112 F in September -- while winters occasionally plunge to near zero, with a record low of -3 F in January. Annual rainfall averages 40.06 inches, much of it delivered by Gulf-moisture thunderstorms that bring hail and damaging wind. With frequent hail days each year, shingle granule loss is a recurring problem, and the rare winter ice storm can crack aged roofing materials after extended freeze-thaw cycles. The combination of intense UV from long summers and periodic severe convective events accelerates membrane and asphalt deterioration faster than the national average.