SnowLoadCheck

Donley County, TX Roof Snow Load - 15 psf

Donley County, TX: your roof's ASCE 7 snow number, in plain English

Moderate
15 psf

Donley County's roofs are built to hold 15 psf of snow, the ASCE 7-22 figure a permit reviewer checks first. Flat and low-pitch roofs in Donley County are actually governed by ASCE 7's §7.3.4 minimum of 15 psf, not the 10.5 psf the ground-load formula alone would produce.

In depth, not weight: that's roughly 33 inches of fresh, light snow, 12 inches of old, settled snow, or as little as 3 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. 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.

Donley County, TX: quick facts

Donley County by the numbers

Nationally that's #1,630 out of 2,758 rated counties, the top 59%; within Texas alone, Donley County ranks #22 of 254. Texas counties average 5.4 psf; Donley County runs 9.6 psf higher than that.

Donley County, FIPS 48129, is home to 3,193 people near 34.955°N 100.8158°W. Its 15 psf ground snow load figure is the map value; 15 psf is what a roof is actually designed for.

Donley County's snowfall, most winters

3.5 in. a year: that's Donley County's NOAA 1991-2020 snowfall normal, measured at CLARENDON, TX US (4.5 mi away). See the density guide.

Before you rely on Donley County's number

Treat the Donley 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.)