Judith Basin County, MT Roof Snow Load - Case Study Area
Judith Basin County, MT: no map figure, on purpose
ASCE 7's own snow load map has no single figure for Judith Basin 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 30045, population 2,111. 386 US counties get this same case-study treatment; Judith Basin County is one of them.
Judith Basin County in numbers
- Population2,111
- Annual snowfall, NOAA normal43.4 in.
- FIPS30045
Judith Basin County: average annual snowfall
Judith Basin County sees about 43.4 in. of snow most winters, per the MARTINSDALE 3 NNW, MT US station's 1991-2020 NOAA normal. 36.8 mi is a real gap between Judith Basin County and its nearest reporting station, so local snowfall can diverge from this figure, especially near elevation changes. See the density guide.
Read this before you use Judith Basin County's figure
The figure above assumes the case ASCE 7-22 treats as typical: a heated, ordinary-occupancy home on a partially exposed site. Change any of those - exposure, heating, roof pitch, occupancy category - and the real design number moves.
A building permit needs the number at your exact address, not the county average - the free ASCE 7 Hazard Tool returns that from your coordinates in about a minute and produces a PDF a plan reviewer will accept. (How this figure is calculated.)