Kittitas County, WA Roof Snow Load - Case Study Area
Kittitas County, WA: no map figure, on purpose
ASCE 7's own snow load map has no single figure for Kittitas 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 53037, population 48,172. 386 US counties get this same case-study treatment; Kittitas County is one of them.
Kittitas County in numbers
- Population48,172
- Annual snowfall, NOAA normal16.5 in.
- FIPS53037
Kittitas County's snowfall, most winters
16.5 in. a year: that's Kittitas County's NOAA 1991-2020 snowfall normal, measured at WENATCHEE, WA US (27.2 mi away). That station is far enough away (27.2 mi) that local snowfall - especially at a different elevation or near a lake - can run noticeably higher or lower than this figure. See the density guide.
Before you rely on Kittitas County's number
Treat the Kittitas 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. See the methodology guide.