This is a severe-cold climate zone, and that shows up in panel damage two ways. First, steel contracts hard in deep cold, and a panel that already had a small dent or a hairline crack from a backed-into vehicle or a thrown snowblower chute tends to split further along that weak point once temperatures drop. Second, doors built in the 1970s - which describes most of what's standing in Des Lacs, median year 1975 - were built before insulated steel became standard, so the panels flex more with temperature swings than a newer door would. Across the wider area, which runs mostly 1963 to 1998 construction with a concentration in 1960s-70s stock, this is a recurring pattern: older, thinner steel meeting a hard winter. It's not unique to any one house here, but it is why panel calls cluster in the cold months.