Warren County, OH Roof Snow Load - 20 psf
What ASCE 7 says about snow load in Warren County
That's Warren 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 Warren 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. 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.
Warren County in numbers
- Design roof snow load20 psf
- Ground snow load, ASCE 7 map20 psf
- National rank#572 of 2,758
- Ohio rank#10 of 86
- Population256,059
- Annual snowfall, NOAA normal14.4 in.
- FIPS39165
Where Warren County's figure sits nationally
Out of 2,758 rated US counties, Warren County sits at #572, the top 21% nationally - #10 of 86 within Ohio. Warren County's figure lands almost exactly on Ohio's own county-average of 20 psf.
Near 39.4257°N 84.1699°W, FIPS 39165: Warren County counts 256,059 residents and a 20 psf map value, which the code's own factors turn into 20 psf.
How much it actually snows in Warren County
Most winters bring Warren County roughly 14.4 in. of snow - NOAA's normal at KINGS MILLS, OH US, 7 mi off. (fresh vs. packed vs. ice explains why.)
Read this before you rely on it
Warren 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 Warren County's county-wide figure. (How this figure is calculated.)