Castro County, TX Roof Snow Load - 20 psf
What ASCE 7 says about snow load in Castro County
That's Castro 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 20 psf is what actually governs on a flat or low-pitch roof here - higher than the 14 psf the base ground-load formula gives.
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. 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.
Castro County, TX: quick facts
- Design roof snow load20 psf
- Ground snow load, ASCE 7 map20 psf
- National rank#1,163 of 2,758
- Texas rank#2 of 254
- Population7,380
- Annual snowfall, NOAA normal11.1 in.
- FIPS48069
Where Castro County's figure sits nationally
Out of 2,758 rated US counties, Castro County sits at #1,163, the top 42% nationally - #2 of 254 within Texas. Texas counties average 5.4 psf; Castro County runs 14.6 psf higher than that.
Near 34.5336°N 102.2588°W, FIPS 48069: Castro County counts 7,380 residents and a 20 psf map value, which the code's own factors turn into 20 psf.
How much it actually snows in Castro County
Most winters bring Castro County roughly 11.1 in. of snow - NOAA's normal at TULIA, TX US, 28.3 mi off. Worth noting: the nearest station reporting snowfall normals sits 28.3 mi from Castro County's center, so treat this as a regional figure rather than an exact one. (fresh vs. packed vs. ice explains why.)
Read this before you rely on it
Castro 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 Castro County's county-wide figure. See the methodology guide.