Mountrail County, ND Roof Snow Load - 24.5 psf

Mountrail County, ND: your roof's ASCE 7 snow number, in plain English

In depth, not weight: that's roughly 53.9 inches of fresh, light snow, 19.6 inches of old, settled snow, or as little as 4.9 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 meaningful design load. Most homes built to modern code handle it, but additions, carports, and flat-roofed sections are worth a second look.

Mountrail County at a glance

• Design roof snow load24.5 psf
• Ground snow load, ASCE 7 map35 psf
• National rank#361 of 2,758
• North Dakota rank#36 of 49
• Population9,474
• Annual snowfall, NOAA normal49.7 in.
• FIPS38061

Mountrail County by the numbers

Nationally that's #361 out of 2,758 rated counties, the top 13%; within North Dakota alone, Mountrail County ranks #36 of 49. That's 4.9 psf below North Dakota's own county-average design load of 29.4 psf.

Mountrail County, FIPS 38061, is home to 9,474 people near 48.2101°N 102.3649°W. Its 35 psf ground snow load figure is the map value; 24.5 psf is what a roof is actually designed for.

Mountrail County's snowfall, most winters

49.7 in. a year: that's Mountrail County's NOAA 1991-2020 snowfall normal, measured at TAGUS, ND US (22 mi away). See the density guide.

Before you rely on Mountrail County's number

Treat the Mountrail 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. (How this figure is calculated.)