Morrison County, MN Roof Snow Load - 42 psf
How much snow is too much for a roof in Morrison County, MN?
42 psf: that's what ASCE 7-22 requires a typical heated home's roof in Morrison County to carry.
Picture it, not just weigh it: 92.4 in. if it's fresh powder, 33.6 in. once it settles, or a mere 8.4 in. if it's ice. A serious structural load. Homes built before modern snow-load provisions, or with low-slope/flat roof sections, are the ones most worth having checked.
Snow on Morrison County's roofs right now?
Morrison County in numbers
- Design roof snow load42 psf
- Ground snow load, ASCE 7 map60 psf
- National rank#40 of 2,758
- Minnesota rank#11 of 87
- Population34,520
- Annual snowfall, NOAA normal50.7 in.
- FIPS27097
How Morrison County compares
42 psf ranks #40 of 2,758 US counties with a mapped snow load (top 1%) - and #11 of 87 in Minnesota. 37.4 psf is Minnesota's typical county figure - Morrison County beats it by 4.6 psf.
Population 34,520 (FIPS 27097), roughly 46.0205°N 94.2666°W. The 60 psf ground snow load ASCE 7-22 maps here becomes 42 psf once the code's own design factors are applied.
Typical snowfall in Morrison County, MN
NOAA's 30-year normal for Morrison County: 50.7 in. of snow a year, from the ROYALTON 5W, MN US station. (fresh vs. packed vs. ice explains why.)
What this Morrison County figure assumes
This is a county-level reference figure for a typical heated home built to Risk Category II (ordinary residential), on a partially exposed lot - the assumptions ASCE 7-22 itself treats as the default case. A steeper roof, a fully exposed hilltop lot, an unheated structure, or a higher risk category all change the actual number.
Morrison County's permit office wants an address-specific figure, not this county average - the ASCE 7 Hazard Tool is free, takes under a minute, and outputs a PDF most reviewers accept. (How this figure is calculated.)