Grays Harbor County, WA Roof Snow Load - Case Study Area
What "Case Study" means for Grays Harbor County
ASCE 7's own snow load map has no single figure for Grays Harbor 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 53027, population 77,893. 386 US counties get this same case-study treatment; Grays Harbor County is one of them.
Grays Harbor County at a glance
- Population77,893
- Annual snowfall, NOAA normal1 in.
- FIPS53027
Grays Harbor County's snowfall, most winters
1 in. a year: that's Grays Harbor County's NOAA 1991-2020 snowfall normal, measured at HUMPTULIPS SALMON HATCHERY, WA US (11.4 mi away). See the density guide.
Before you rely on Grays Harbor County's number
Treat the Grays Harbor 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. Details: the calculation guide.