SnowLoadCheck

McDowell County, NC Roof Snow Load - 15 psf

How much snow is too much for a roof in McDowell County, NC?

Moderate
15 psf

15 psf: that's what ASCE 7-22 requires a typical heated home's roof in McDowell County to carry. The physics-based figure alone would be 10.5 psf, but ASCE 7's own low-slope minimum (§7.3.4) sets a floor of 15 psf for flat and low-pitch roofs here, which is the number that actually governs.

Picture it, not just weigh it: 33 in. if it's fresh powder, 12 in. once it settles, or a mere 3 in. if it's 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.

Got real snow on a McDowell County roof right now?

in. of

McDowell County at a glance

How McDowell County compares

15 psf ranks #1,387 of 2,758 US counties with a mapped snow load (top 50%) - and #37 of 100 in North Carolina. North Carolina counties average 12.9 psf; McDowell County runs 2.1 psf higher than that.

Population 45,269 (FIPS 37111), roughly 35.6823°N 82.048°W. The 15 psf ground snow load ASCE 7-22 maps here becomes 15 psf once the code's own design factors are applied.

Typical snowfall in McDowell County, NC

NOAA's 30-year normal for McDowell County: 7.1 in. of snow a year, from the MARION, NC US station. (fresh vs. packed vs. ice explains why.)

What this McDowell County figure assumes

This is a county-level reference figure for a typical heated home built to Risk Category II (ordinary residential), on a partially exposed lot - the assumptions ASCE 7-22 itself treats as the default case. A steeper roof, a fully exposed hilltop lot, an unheated structure, or a higher risk category all change the actual number.

McDowell County's permit office wants an address-specific figure, not this county average - the ASCE 7 Hazard Tool is free, takes under a minute, and outputs a PDF most reviewers accept. Details: the calculation guide.