Webster County, MO Roof Snow Load - 20 psf
What ASCE 7 says about snow load in Webster County
That's Webster County's design roof snow load per ASCE 7-22, for a typical heated single-family home - the number a permit reviewer starts from. Flat and low-pitch roofs in Webster County are actually governed by ASCE 7's §7.3.4 minimum of 20 psf, not the 14 psf the ground-load formula alone would produce.
Converted to something you can actually eyeball on a roof: about 44 in. of fresh powder, 16 in. once it settles and packs down, or just 4 in. if it's turned to ice. A meaningful design load. Most homes built to modern code handle it, but additions, carports, and flat-roofed sections are worth a second look.
Webster County in numbers
- Design roof snow load20 psf
- Ground snow load, ASCE 7 map20 psf
- National rank#773 of 2,758
- Missouri rank#21 of 115
- Population42,041
- Annual snowfall, NOAA normal7.7 in.
- FIPS29225
Where Webster County's figure sits nationally
Out of 2,758 rated US counties, Webster County sits at #773, the top 28% nationally - #21 of 115 within Missouri. 18.6 psf is Missouri's typical county figure - Webster County beats it by 1.4 psf.
Near 37.2808°N 92.8761°W, FIPS 29225: Webster County counts 42,041 residents and a 20 psf map value, which the code's own factors turn into 20 psf.
How much it actually snows in Webster County
Most winters bring Webster County roughly 7.7 in. of snow - NOAA's normal at MANSFIELD, MO US, 20.2 mi off. (fresh vs. packed vs. ice explains why.)
Read this before you rely on it
Webster County's number above is ASCE 7-22's default case, not a custom calculation: ordinary residential occupancy, heated, sited on ground that's neither fully sheltered nor fully exposed. Any one of those changing - pitch, exposure, heating, occupancy - moves the real figure.
Nothing here substitutes for an address-level number. Get one free, in about a minute, from the ASCE 7 Hazard Tool using your own coordinates rather than Webster County's county-wide figure. (How this figure is calculated.)