SnowLoadCheck

Scott County, MO Roof Snow Load - 15 psf

Scott County, MO: your roof's ASCE 7 snow number, in plain English

Moderate
15 psf

Scott County's roofs are built to hold 15 psf of snow, the ASCE 7-22 figure a permit reviewer checks first. §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.

In depth, not weight: that's roughly 33 inches of fresh, light snow, 12 inches of old, settled snow, or as little as 3 inches of solid ice - snow that heavy is rare here but ice from a freeze-thaw cycle adds up far faster than the depth suggests. 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.

Scott County in numbers

Scott County by the numbers

Nationally that's #1,407 out of 2,758 rated counties, the top 51%; within Missouri alone, Scott County ranks #94 of 115. Missouri counties average 18.6 psf; Scott County runs 3.6 psf lower than that.

Scott County, FIPS 29201, is home to 37,957 people near 37.0478°N 89.5681°W. Its 15 psf ground snow load figure is the map value; 15 psf is what a roof is actually designed for.

Scott County's snowfall, most winters

3.1 in. a year: that's Scott County's NOAA 1991-2020 snowfall normal, measured at SIKESTON PWR STN, MO US (12.2 mi away). See the density guide.

Before you rely on Scott County's number

Treat the Scott County figure as a starting point, not a final answer: it assumes standard occupancy, a heated structure and a moderately sheltered site, per ASCE 7-22's own defaults. Exposed terrain, an unheated building or a steeper roof all shift the real number.

For a real application, skip the county number and go straight to the ASCE 7 Hazard Tool - enter your coordinates and it returns a site-specific figure a plan reviewer will recognize. (How this figure is calculated.)