SnowLoadCheck

Allen County, KS Roof Snow Load - 20 psf

What ASCE 7 says about snow load in Allen County

Moderate
20 psf

That's Allen County's design roof snow load per ASCE 7-22, for a typical heated single-family home - the number a permit reviewer starts from. 14 psf is what the ground-load formula alone gives; Allen County's 20 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 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.

Snow on Allen County's roofs right now?

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Allen County in numbers

Where Allen County's figure sits nationally

Out of 2,758 rated US counties, Allen County sits at #1,066, the top 39% nationally - #23 of 105 within Kansas. 18.2 psf is Kansas's typical county figure - Allen County beats it by 1.8 psf.

Near 37.8842°N 95.3009°W, FIPS 20001: Allen County counts 12,425 residents and a 20 psf map value, which the code's own factors turn into 20 psf.

How much it actually snows in Allen County

Most winters bring Allen County roughly 9.2 in. of snow - NOAA's normal at MORAN, KS US, 7.2 mi off. (fresh vs. packed vs. ice explains why.)

Read this before you rely on it

Allen 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 Allen County's county-wide figure. See the methodology guide.