Clarke County, VA Roof Snow Load - Case Study Area
Clarke County, VA: no map figure, on purpose
ASCE 7's own snow load map has no single figure for Clarke County: the terrain is complex enough that the code (§7.2) requires an elevation-specific study rather than a county-wide value. That is the map being accurate, not a data gap.
FIPS 51043, population 15,598. 386 US counties get this same case-study treatment; Clarke County is one of them.
Clarke County at a glance
- Population15,598
- Annual snowfall, NOAA normal21.1 in.
- FIPS51043
Clarke County's snowfall, most winters
21.1 in. a year: that's Clarke County's NOAA 1991-2020 snowfall normal, measured at FRONT ROYAL, VA US (17.9 mi away). See the density guide.
Before you rely on Clarke County's number
Treat the Clarke 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.)