Marshall County, MN Roof Snow Load - 42 psf
Marshall County, MN: your roof's ASCE 7 snow number, in plain English
Marshall County's roofs are built to hold 42 psf of snow, the ASCE 7-22 figure a permit reviewer checks first.
In depth, not weight: that's roughly 92.4 inches of fresh, light snow, 33.6 inches of old, settled snow, or as little as 8.4 inches of solid ice - snow that heavy is rare here but ice from a freeze-thaw cycle adds up far faster than the depth suggests. 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.
Marshall County, MN: quick facts
- Design roof snow load42 psf
- Ground snow load, ASCE 7 map60 psf
- National rank#74 of 2,758
- Minnesota rank#23 of 87
- Population8,771
- Annual snowfall, NOAA normal43.6 in.
- FIPS27089
Marshall County by the numbers
Nationally that's #74 out of 2,758 rated counties, the top 3%; within Minnesota alone, Marshall County ranks #23 of 87. That's 4.6 psf above Minnesota's own county-average design load of 37.4 psf.
Marshall County, FIPS 27089, is home to 8,771 people near 48.3627°N 96.3578°W. Its 60 psf ground snow load figure is the map value; 42 psf is what a roof is actually designed for.
Marshall County's snowfall, most winters
43.6 in. a year: that's Marshall County's NOAA 1991-2020 snowfall normal, measured at ARGYLE, MN US (21.6 mi away). See the density guide.
Before you rely on Marshall County's number
Treat the Marshall County figure as a starting point, not a final answer: it assumes standard occupancy, a heated structure and a moderately sheltered site, per ASCE 7-22's own defaults. Exposed terrain, an unheated building or a steeper roof all shift the real number.
For a real application, skip the county number and go straight to the ASCE 7 Hazard Tool - enter your coordinates and it returns a site-specific figure a plan reviewer will recognize. See the methodology guide.