Monroe County, MO Roof Snow Load - 20 psf
What ASCE 7 says about snow load in Monroe County
That's Monroe County's design roof snow load per ASCE 7-22, for a typical heated single-family home - the number a permit reviewer starts from. §7.3.4's low-slope minimum of 20 psf is what actually governs on a flat or low-pitch roof here - higher than the 14 psf the base ground-load formula gives.
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. This is a meaningful design load - most modern-code homes handle it fine, though an addition, a carport or a flat-roofed section can be a weak spot.
Monroe County, MO: quick facts
- Design roof snow load20 psf
- Ground snow load, ASCE 7 map20 psf
- National rank#1,127 of 2,758
- Missouri rank#66 of 115
- Population8,890
- Annual snowfall, NOAA normal17.8 in.
- FIPS29137
Where Monroe County's figure sits nationally
Out of 2,758 rated US counties, Monroe County sits at #1,127, the top 41% nationally - #66 of 115 within Missouri. 18.6 psf is Missouri's typical county figure - Monroe County beats it by 1.4 psf.
Near 39.4983°N 92.0065°W, FIPS 29137: Monroe County counts 8,890 residents and a 20 psf map value, which the code's own factors turn into 20 psf.
How much it actually snows in Monroe County
Most winters bring Monroe County roughly 17.8 in. of snow - NOAA's normal at STEFFENVILLE, MO US, 33.2 mi off. 33.2 mi is a real gap between Monroe County and its nearest reporting station, so local snowfall can diverge from this figure, especially near elevation changes. (fresh vs. packed vs. ice explains why.)
Read this before you rely on it
Monroe 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 Monroe County's county-wide figure. See the methodology guide.