York County, PA Roof Snow Load - 21 psf
What ASCE 7 says about snow load in York County
That's York County's design roof snow load per ASCE 7-22, for a typical heated single-family home - the number a permit reviewer starts from.
Converted to something you can actually eyeball on a roof: about 46.2 in. of fresh powder, 16.8 in. once it settles and packs down, or just 4.2 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.
Already snow on the roof in York County?
York County at a glance
- Design roof snow load21 psf
- Ground snow load, ASCE 7 map30 psf
- National rank#392 of 2,758
- Pennsylvania rank#7 of 38
- Population471,240
- Annual snowfall, NOAA normal24.6 in.
- FIPS42133
Where York County's figure sits nationally
Out of 2,758 rated US counties, York County sits at #392, the top 14% nationally - #7 of 38 within Pennsylvania. Pennsylvania counties average 20.9 psf; York County runs 0.1 psf higher than that.
Near 39.9218°N 76.7289°W, FIPS 42133: York County counts 471,240 residents and a 30 psf map value, which the code's own factors turn into 21 psf.
How much it actually snows in York County
Most winters bring York County roughly 24.6 in. of snow - NOAA's normal at YORK 3 SSW PUMP STN, PA US, 1.2 mi off. (fresh vs. packed vs. ice explains why.)
Read this before you rely on it
York 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 York County's county-wide figure. (How this figure is calculated.)