Webster County, IA Roof Snow Load - 21 psf

How much snow is too much for a roof in Webster County, IA?

Picture it, not just weigh it: 46.2 in. if it's fresh powder, 16.8 in. once it settles, or a mere 4.2 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.

Webster County in numbers

• Design roof snow load21 psf
• Ground snow load, ASCE 7 map30 psf
• National rank#446 of 2,758
• Iowa rank#30 of 99
• Population36,909
• Annual snowfall, NOAA normal32.9 in.
• FIPS19187

How Webster County compares

21 psf ranks #446 of 2,758 US counties with a mapped snow load (top 16%) - and #30 of 99 in Iowa. That's 0.7 psf below Iowa's own county-average design load of 21.7 psf.

Population 36,909 (FIPS 19187), roughly 42.4336°N 94.1758°W. The 30 psf ground snow load ASCE 7-22 maps here becomes 21 psf once the code's own design factors are applied.

Typical snowfall in Webster County, IA

NOAA's 30-year normal for Webster County: 32.9 in. of snow a year, from the WEBSTER CITY, IA US station. (fresh vs. packed vs. ice explains why.)

What this Webster 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.

Webster 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. (How this figure is calculated.)