Red Willow County, NE Roof Snow Load - 20 psf
Red Willow County, NE: your roof's ASCE 7 snow number, in plain English
Red Willow County's roofs are built to hold 20 psf of snow, the ASCE 7-22 figure a permit reviewer checks first. Flat and low-pitch roofs in Red Willow County are actually governed by ASCE 7's §7.3.4 minimum of 20 psf, not the 17.5 psf the ground-load formula alone would produce.
In depth, not weight: that's roughly 44 inches of fresh, light snow, 16 inches of old, settled snow, or as little as 4 inches of solid ice - snow that heavy is rare here but ice from a freeze-thaw cycle adds up far faster than the depth suggests. Modern-code homes carry a load like this without issue; an older addition, a carport, or any flat-roofed section is where it is worth checking first.
Got real snow on a Red Willow County roof right now?
Red Willow County, NE: quick facts
- Design roof snow load20 psf
- Ground snow load, ASCE 7 map25 psf
- National rank#1,096 of 2,758
- Nebraska rank#37 of 93
- Population10,409
- Annual snowfall, NOAA normal29.9 in.
- FIPS31145
Red Willow County by the numbers
Nationally that's #1,096 out of 2,758 rated counties, the top 40%; within Nebraska alone, Red Willow County ranks #37 of 93. 20.2 psf is Nebraska's typical county figure - Red Willow County comes in 0.2 psf under it.
Red Willow County, FIPS 31145, is home to 10,409 people near 40.1694°N 100.4686°W. Its 25 psf ground snow load figure is the map value; 20 psf is what a roof is actually designed for.
Red Willow County's snowfall, most winters
29.9 in. a year: that's Red Willow County's NOAA 1991-2020 snowfall normal, measured at MC COOK, NE US (8.5 mi away). See the density guide.
Before you rely on Red Willow County's number
Treat the Red Willow 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.