Lower Connecticut River Valley Planning Region Snow Load:...
Lower Connecticut River Valley Planning Region, CT: your roof's ASCE 7 snow number, in plain English
Lower Connecticut River Valley Planning Region's roofs are built to hold 21 psf of snow, the ASCE 7-22 figure a permit reviewer checks first.
In depth, not weight: that's roughly 46.2 inches of fresh, light snow, 16.8 inches of old, settled snow, or as little as 4.2 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. This is a meaningful design load - most modern-code homes handle it fine, though an addition, a carport or a flat-roofed section can be a weak spot.
Lower Connecticut River Valley Planning Region in numbers
- Design roof snow load21 psf
- Ground snow load, ASCE 7 map30 psf
- National rank#405 of 2,758
- Connecticut rank#9 of 9
- Population177,540
- Annual snowfall, NOAA normal27.8 in.
- FIPS09130
Lower Connecticut River Valley Planning Region by the numbers
Nationally that's #405 out of 2,758 rated counties, the top 15%; within Connecticut alone, Lower Connecticut River Valley Planning Region ranks #9 of 9. Connecticut counties average 22.6 psf; Lower Connecticut River Valley Planning Region runs 1.6 psf lower than that.
Lower Connecticut River Valley Planning Region, FIPS 09130, is home to 177,540 people near 41.4203°N 72.4935°W. Its 30 psf ground snow load figure is the map value; 21 psf is what a roof is actually designed for.
Lower Connecticut River Valley Planning Region's snowfall, most winters
27.8 in. a year: that's Lower Connecticut River Valley Planning Region's NOAA 1991-2020 snowfall normal, measured at NORWICH PUBLIC UTILITY PLT, CT US (23.4 mi away). See the density guide.
Before you rely on Lower Connecticut River Valley Planning Region's number
Treat the Lower Connecticut River Valley Planning Region 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. See the methodology guide.