Marquette County, MI Roof Snow Load - 49 psf
What ASCE 7 says about snow load in Marquette County
That's Marquette County's design roof snow load per ASCE 7-22, for a typical heated single-family home - the number a permit reviewer starts from.
Converted to something you can actually eyeball on a roof: about 107.8 in. of fresh powder, 39.2 in. once it settles and packs down, or just 9.8 in. if it's turned to ice. A load this size is a serious structural matter; pre-modern-code homes and low-slope or flat-roofed sections are the ones most worth an inspection.
Marquette County at a glance
- Design roof snow load49 psf
- Ground snow load, ASCE 7 map70 psf
- National rank#11 of 2,758
- Michigan rank#2 of 70
- Population67,979
- Annual snowfall, NOAA normal102 in.
- FIPS26103
Where Marquette County's figure sits nationally
Out of 2,758 rated US counties, Marquette County sits at #11, the top 1% nationally - #2 of 70 within Michigan. 31.7 psf is Michigan's typical county figure - Marquette County beats it by 17.3 psf.
Near 46.6566°N 87.584°W, FIPS 26103: Marquette County counts 67,979 residents and a 70 psf map value, which the code's own factors turn into 49 psf.
How much it actually snows in Marquette County
Most winters bring Marquette County roughly 102 in. of snow - NOAA's normal at MARQUETTE, MI US, 12.4 mi off. (fresh vs. packed vs. ice explains why.)
Read this before you rely on it
Marquette County's number above is ASCE 7-22's default case, not a custom calculation: ordinary residential occupancy, heated, sited on ground that's neither fully sheltered nor fully exposed. Any one of those changing - pitch, exposure, heating, occupancy - moves the real figure.
Nothing here substitutes for an address-level number. Get one free, in about a minute, from the ASCE 7 Hazard Tool using your own coordinates rather than Marquette County's county-wide figure. (How this figure is calculated.)