SnowLoadCheck

Wythe County, VA Roof Snow Load - 20 psf

What ASCE 7 says about snow load in Wythe County

Moderate
20 psf

That's Wythe County's design roof snow load per ASCE 7-22, for a typical heated single-family home - the number a permit reviewer starts from. ASCE 7's low-slope-roof minimum (§7.3.4) raises the governing figure to 20 psf - higher than the 17.5 psf the ground-load formula alone would give, and the code says use the larger one.

Converted to something you can actually eyeball on a roof: about 44 in. of fresh powder, 16 in. once it settles and packs down, or just 4 in. if it's turned to ice. This is a meaningful design load - most modern-code homes handle it fine, though an addition, a carport or a flat-roofed section can be a weak spot.

Wythe County, VA: quick facts

Where Wythe County's figure sits nationally

Out of 2,758 rated US counties, Wythe County sits at #880, the top 32% nationally - #48 of 110 within Virginia. 18.3 psf is Virginia's typical county figure - Wythe County beats it by 1.7 psf.

Near 36.8999°N 81.083°W, FIPS 51197: Wythe County counts 28,100 residents and a 25 psf map value, which the code's own factors turn into 20 psf.

How much it actually snows in Wythe County

Most winters bring Wythe County roughly 18.4 in. of snow - NOAA's normal at WYTHEVILLE, VA US, 4.3 mi off. (fresh vs. packed vs. ice explains why.)

Read this before you rely on it

Wythe 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 Wythe County's county-wide figure. (How this figure is calculated.)