Weston County, WY Roof Snow Load - 20 psf
How much snow is too much for a roof in Weston County, WY?
20 psf: that's what ASCE 7-22 requires a typical heated home's roof in Weston County to carry. §7.3.4's low-slope minimum of 20 psf is what actually governs on a flat or low-pitch roof here - higher than the 14 psf the base ground-load formula gives.
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.
Weston County, WY: quick facts
- Design roof snow load20 psf
- Ground snow load, ASCE 7 map20 psf
- National rank#1,173 of 2,758
- Wyoming rank#9 of 18
- Population6,866
- Annual snowfall, NOAA normal46.4 in.
- FIPS56045
How Weston County compares
20 psf ranks #1,173 of 2,758 US counties with a mapped snow load (top 43%) - and #9 of 18 in Wyoming. Wyoming counties average 17.5 psf; Weston County runs 2.5 psf higher than that.
Population 6,866 (FIPS 56045), roughly 43.8462°N 104.57°W. The 20 psf ground snow load ASCE 7-22 maps here becomes 20 psf once the code's own design factors are applied.
Typical snowfall in Weston County, WY
NOAA's 30-year normal for Weston County: 46.4 in. of snow a year, from the UPTON, WY US station. (fresh vs. packed vs. ice explains why.)
What this Weston 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.
Weston 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. See the methodology guide.