SnowLoadCheck

Niobrara County, WY Roof Snow Load - 15 psf

What ASCE 7 says about snow load in Niobrara County

Moderate
15 psf

That's Niobrara County's design roof snow load per ASCE 7-22, for a typical heated single-family home - the number a permit reviewer starts from. §7.3.4's low-slope minimum of 15 psf is what actually governs on a flat or low-pitch roof here - higher than the 10.5 psf the base ground-load formula gives.

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. A meaningful design load. Most homes built to modern code handle it, but additions, carports, and flat-roofed sections are worth a second look.

Niobrara County, WY: quick facts

Where Niobrara County's figure sits nationally

Out of 2,758 rated US counties, Niobrara County sits at #1,640, the top 59% nationally - #18 of 18 within Wyoming. That's 2.5 psf below Wyoming's own county-average design load of 17.5 psf.

Near 43.0622°N 104.4684°W, FIPS 56027: Niobrara County counts 2,301 residents and a 15 psf map value, which the code's own factors turn into 15 psf.

How much it actually snows in Niobrara County

Most winters bring Niobrara County roughly 41.2 in. of snow - NOAA's normal at LANCE CREEK 11NNE, WY US, 10.8 mi off. (fresh vs. packed vs. ice explains why.)

Read this before you rely on it

Niobrara 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 Niobrara County's county-wide figure. (How this figure is calculated.)