Lamb County, TX Roof Snow Load - 15 psf
What ASCE 7 says about snow load in Lamb County
That's Lamb 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 Lamb County are actually governed by ASCE 7's §7.3.4 minimum of 15 psf, not the 10.5 psf the ground-load formula alone would produce.
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. Modern-code homes carry a load like this without issue; an older addition, a carport, or any flat-roofed section is where it is worth checking first.
Got real snow on a Lamb County roof right now?
Lamb County, TX: quick facts
- Design roof snow load15 psf
- Ground snow load, ASCE 7 map15 psf
- National rank#1,526 of 2,758
- Texas rank#14 of 254
- Population12,687
- Annual snowfall, NOAA normal7.1 in.
- FIPS48279
Where Lamb County's figure sits nationally
Out of 2,758 rated US counties, Lamb County sits at #1,526, the top 55% nationally - #14 of 254 within Texas. 5.4 psf is Texas's typical county figure - Lamb County beats it by 9.6 psf.
Near 34.0689°N 102.348°W, FIPS 48279: Lamb County counts 12,687 residents and a 15 psf map value, which the code's own factors turn into 15 psf.
How much it actually snows in Lamb County
Most winters bring Lamb County roughly 7.1 in. of snow - NOAA's normal at SHALLOWATER, TX US, 33.6 mi off. That station is far enough away (33.6 mi) that local snowfall - especially at a different elevation or near a lake - can run noticeably higher or lower than this figure. (fresh vs. packed vs. ice explains why.)
Read this before you rely on it
Lamb 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 Lamb County's county-wide figure. See the methodology guide.