Dade County, MO Roof Snow Load - 15 psf
What ASCE 7 says about snow load in Dade County
That's Dade County's design roof snow load per ASCE 7-22, for a typical heated single-family home - the number a permit reviewer starts from. 10.5 psf is what the ground-load formula alone gives; Dade County's 15 psf low-slope minimum (§7.3.4) beats it, so that figure is the one that governs on flat and low-pitch roofs.
Converted to something you can actually eyeball on a roof: about 33 in. of fresh powder, 12 in. once it settles and packs down, or just 3 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.
Dade County in numbers
- Design roof snow load15 psf
- Ground snow load, ASCE 7 map15 psf
- National rank#1,579 of 2,758
- Missouri rank#110 of 115
- Population7,622
- Annual snowfall, NOAA normal12.8 in.
- FIPS29057
Where Dade County's figure sits nationally
Out of 2,758 rated US counties, Dade County sits at #1,579, the top 57% nationally - #110 of 115 within Missouri. 18.6 psf is Missouri's typical county figure - Dade County comes in 3.6 psf under it.
Near 37.4323°N 93.8549°W, FIPS 29057: Dade County counts 7,622 residents and a 15 psf map value, which the code's own factors turn into 15 psf.
How much it actually snows in Dade County
Most winters bring Dade County roughly 12.8 in. of snow - NOAA's normal at LOCKWOOD, MO US, 5.9 mi off. (fresh vs. packed vs. ice explains why.)
Read this before you rely on it
Dade 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 Dade County's county-wide figure. Details: the calculation guide.