Weather
Georgia Winter Weather: How 1 Inch of Water Can Become 20 of Snow
Atlanta, GA – Winter storms across Georgia can produce dramatically different snowfall totals, even when communities receive similar amounts of moisture. From Atlanta to Athens, 1 inch of liquid preci
By Natalie Rhodes · 2026-11-10T07:49:51.268Z
Atlanta, GA – Winter storms across Georgia can produce dramatically different snowfall totals, even when communities receive similar amounts of moisture. From Atlanta to Athens, 1 inch of liquid precipitation could theoretically produce 5 inches of heavy, wet snow or as much as 20 inches of lighter, fluffier snow under the right atmospheric conditions.
The difference comes down to the snow to liquid ratio, which describes how much snow accumulates from a given amount of liquid water.
Why One Inch Can Produce 20 Inches of Snow
A commonly used guideline is the 10 to 1 ratio, meaning 1 inch of liquid water produces approximately 10 inches of snow.
However, snowfall does not always follow that formula.
Heavy, wet snow may have a ratio near 5 to 1, producing approximately 5 inches from 1 inch of liquid precipitation.
Under colder atmospheric conditions favorable for fluffy snow, ratios can sometimes reach 20 to 1, producing approximately 20 inches from the same moisture.
Such high ratios are less typical of Georgia's relatively mild winter climate.
Atlanta and Athens: Why Snowfall Can Differ
Atlanta's location in north central Georgia can expose the city to rapidly changing winter temperatures, especially when warmer air moves north ahead of a storm.
Athens, farther east in the Piedmont region, may experience different temperature patterns depending on a storm's track.
North Georgia's mountains introduce another important factor.
Higher elevations around Blue Ridge and Blairsville can remain colder than nearby lower elevations, increasing the potential for accumulating snow.
However, warm air above the surface can cause falling snow to melt or change into sleet and freezing rain before reaching the ground.
What Georgia Residents Should Know
Wet snow can weigh down trees and power lines, increasing the potential for damage and outages.
Freezing rain is another major concern because ice can make roads dangerous even when little snow accumulates.
Travel conditions can change quickly along Interstate 20, Interstate 75 and Interstate 85, particularly on bridges and overpasses.
Understanding snow to liquid ratios helps explain why snowfall forecasts can change even when expected precipitation amounts remain similar.
For Georgia residents, winter storm impacts depend on more than moisture alone. Temperature, elevation and precipitation type determine whether rain, ice or snow reaches the ground.