Cascade County, MT Roof Snow Load - Case Study Area
Cascade County, MT: no map figure, on purpose
ASCE 7's own snow load map has no single figure for Cascade 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 30013, population 84,523. 386 US counties get this same case-study treatment; Cascade County is one of them.
Cascade County at a glance
- Population84,523
- Annual snowfall, NOAA normal66.1 in.
- FIPS30013
Cascade County's snowfall, most winters
66.1 in. a year: that's Cascade County's NOAA 1991-2020 snowfall normal, measured at GREAT FALLS INTL AP, MT US (10.9 mi away). See the density guide.
Before you rely on Cascade County's number
Treat the Cascade 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.