McPherson County, NE Roof Snow Load - 20 psf
How much snow is too much for a roof in McPherson County, NE?
20 psf: that's what ASCE 7-22 requires a typical heated home's roof in McPherson County to carry. Flat and low-pitch roofs in McPherson County are actually governed by ASCE 7's §7.3.4 minimum of 20 psf, not the 17.5 psf the ground-load formula alone would produce.
Picture it, not just weigh it: 44 in. if it's fresh powder, 16 in. once it settles, or a mere 4 in. if it's ice. Modern-code homes carry a load like this without issue; an older addition, a carport, or any flat-roofed section is where it is worth checking first.
McPherson County at a glance
- Design roof snow load20 psf
- Ground snow load, ASCE 7 map25 psf
- National rank#1,305 of 2,758
- Nebraska rank#91 of 93
- Population376
- Annual snowfall, NOAA normal41.8 in.
- FIPS31117
How McPherson County compares
20 psf ranks #1,305 of 2,758 US counties with a mapped snow load (top 47%) - and #91 of 93 in Nebraska. Nebraska counties average 20.2 psf; McPherson County runs 0.2 psf lower than that.
Population 376 (FIPS 31117), roughly 41.6484°N 101.1209°W. The 25 psf ground snow load ASCE 7-22 maps here becomes 20 psf once the code's own design factors are applied.
Typical snowfall in McPherson County, NE
NOAA's 30-year normal for McPherson County: 41.8 in. of snow a year, from the MULLEN, NE US station. 27.5 mi is a real gap between McPherson County and its nearest reporting station, so local snowfall can diverge from this figure, especially near elevation changes. (fresh vs. packed vs. ice explains why.)
What this McPherson 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.
McPherson 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. Details: the calculation guide.