Genesee County, MI Roof Snow Load - 21 psf
What ASCE 7 says about snow load in Genesee County
That's Genesee 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 46.2 in. of fresh powder, 16.8 in. once it settles and packs down, or just 4.2 in. if it's turned to ice. A meaningful design load. Most homes built to modern code handle it, but additions, carports, and flat-roofed sections are worth a second look.
Genesee County in numbers
- Design roof snow load21 psf
- Ground snow load, ASCE 7 map30 psf
- National rank#395 of 2,758
- Michigan rank#50 of 70
- Population402,279
- Annual snowfall, NOAA normal40.4 in.
- FIPS26049
Where Genesee County's figure sits nationally
Out of 2,758 rated US counties, Genesee County sits at #395, the top 14% nationally - #50 of 70 within Michigan. That's 10.7 psf below Michigan's own county-average design load of 31.7 psf.
Near 43.0211°N 83.7064°W, FIPS 26049: Genesee County counts 402,279 residents and a 30 psf map value, which the code's own factors turn into 21 psf.
How much it actually snows in Genesee County
Most winters bring Genesee County roughly 40.4 in. of snow - NOAA's normal at FLINT 7W, MI US, 3.4 mi off. (fresh vs. packed vs. ice explains why.)
Read this before you rely on it
Genesee 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 Genesee County's county-wide figure. See the methodology guide.