Elmore County, ID Roof Snow Load - Case Study Area
Elmore County, ID: no map figure, on purpose
ASCE 7's own snow load map has no single figure for Elmore 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 16039, population 29,729. 386 US counties get this same case-study treatment; Elmore County is one of them.
Elmore County at a glance
- Population29,729
- Annual snowfall, NOAA normal17.6 in.
- FIPS16039
Elmore County's snowfall, most winters
17.6 in. a year: that's Elmore County's NOAA 1991-2020 snowfall normal, measured at BOISE AIR TERMINAL, ID US (40.4 mi away). 40.4 mi is a real gap between Elmore County and its nearest reporting station, so local snowfall can diverge from this figure, especially near elevation changes. See the density guide.
Before you rely on Elmore County's number
Treat the Elmore 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.)