SnowLoadCheck

Wayne County, MO Roof Snow Load - 15 psf

What ASCE 7 says about snow load in Wayne County

Moderate
15 psf

That's Wayne County's design roof snow load per ASCE 7-22, for a typical heated single-family home - the number a permit reviewer starts from. 10.5 psf is what the ground-load formula alone gives; Wayne County's 15 psf low-slope minimum (§7.3.4) beats it, so that figure is the one that governs on flat and low-pitch roofs.

Converted to something you can actually eyeball on a roof: about 33 in. of fresh powder, 12 in. once it settles and packs down, or just 3 in. if it's turned to ice. A meaningful design load. Most homes built to modern code handle it, but additions, carports, and flat-roofed sections are worth a second look.

Wayne County at a glance

Where Wayne County's figure sits nationally

Out of 2,758 rated US counties, Wayne County sits at #1,544, the top 56% nationally - #105 of 115 within Missouri. 18.6 psf is Missouri's typical county figure - Wayne County comes in 3.6 psf under it.

Near 37.1111°N 90.4539°W, FIPS 29223: Wayne County counts 10,820 residents and a 15 psf map value, which the code's own factors turn into 15 psf.

How much it actually snows in Wayne County

Most winters bring Wayne County roughly 8.9 in. of snow - NOAA's normal at WILLIAMSVILLE, MO US, 11.3 mi off. (fresh vs. packed vs. ice explains why.)

Read this before you rely on it

Wayne County's number above is ASCE 7-22's default case, not a custom calculation: ordinary residential occupancy, heated, sited on ground that's neither fully sheltered nor fully exposed. Any one of those changing - pitch, exposure, heating, occupancy - moves the real figure.

Nothing here substitutes for an address-level number. Get one free, in about a minute, from the ASCE 7 Hazard Tool using your own coordinates rather than Wayne County's county-wide figure. (How this figure is calculated.)