Mahnomen County, MN Roof Snow Load - 42 psf

What ASCE 7 says about snow load in Mahnomen County

Converted to something you can actually eyeball on a roof: about 92.4 in. of fresh powder, 33.6 in. once it settles and packs down, or just 8.4 in. if it's turned to 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.

Mahnomen County in numbers

• Design roof snow load42 psf
• Ground snow load, ASCE 7 map60 psf
• National rank#79 of 2,758
• Minnesota rank#26 of 87
• Population5,296
• Annual snowfall, NOAA normal49.9 in.
• FIPS27087

Where Mahnomen County's figure sits nationally

Out of 2,758 rated US counties, Mahnomen County sits at #79, the top 3% nationally - #26 of 87 within Minnesota. That's 4.6 psf above Minnesota's own county-average design load of 37.4 psf.

Near 47.3284°N 95.8111°W, FIPS 27087: Mahnomen County counts 5,296 residents and a 60 psf map value, which the code's own factors turn into 42 psf.

How much it actually snows in Mahnomen County

Most winters bring Mahnomen County roughly 49.9 in. of snow - NOAA's normal at RED LAKE FALLS, MN US, 44 mi off. Worth noting: the nearest station reporting snowfall normals sits 44 mi from Mahnomen County's center, so treat this as a regional figure rather than an exact one. (fresh vs. packed vs. ice explains why.)

Read this before you rely on it

Mahnomen 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 Mahnomen County's county-wide figure. See the methodology guide.