SnowLoadCheck

Lancaster County, NE Roof Snow Load - 20 psf

What ASCE 7 says about snow load in Lancaster County

Moderate
20 psf

That's Lancaster 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 Lancaster County are actually governed by ASCE 7's §7.3.4 minimum of 20 psf, not the 17.5 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.

Lancaster County, NE: quick facts

Where Lancaster County's figure sits nationally

Out of 2,758 rated US counties, Lancaster County sits at #559, the top 20% nationally - #15 of 93 within Nebraska. Nebraska counties average 20.2 psf; Lancaster County runs 0.2 psf lower than that.

Near 40.7835°N 96.6887°W, FIPS 31109: Lancaster County counts 332,857 residents and a 25 psf map value, which the code's own factors turn into 20 psf.

How much it actually snows in Lancaster County

Most winters bring Lancaster County roughly 26 in. of snow - NOAA's normal at LINCOLN MUNI AP, NE US, 5.6 mi off. (fresh vs. packed vs. ice explains why.)

Read this before you rely on it

Lancaster 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 Lancaster County's county-wide figure. Details: the calculation guide.