Weather
Mississippi Winter: How 1 Inch of Water Can Mean 20 of Snow
Jackson, MS – Winter storms across Mississippi can produce surprisingly different snowfall totals, even when communities receive similar amounts of moisture. From Jackson to Tupelo, 1 inch of liquid p
By Mason Reid · 2026-11-10T07:50:19.416Z
Jackson, MS – Winter storms across Mississippi can produce surprisingly different snowfall totals, even when communities receive similar amounts of moisture. From Jackson to Tupelo, 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 forecasting guideline is the 10 to 1 ratio, meaning 1 inch of liquid water produces approximately 10 inches of snow.
However, actual snowfall ratios can vary considerably.
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 Mississippi's relatively mild winter climate.
Jackson and Tupelo: Why Snowfall Can Differ
Jackson's location in central Mississippi can expose the city to relatively warmer air during winter storms, increasing the likelihood of rain or mixed precipitation.
Tupelo, farther north in northeastern Mississippi, may experience colder conditions when Arctic air moves into the region.
A difference of just a few degrees can determine whether precipitation falls as rain, sleet, freezing rain or snow.
Northern Mississippi communities may sometimes receive accumulating snow while areas farther south experience rain.
However, storm tracks and temperatures throughout the atmosphere ultimately determine precipitation type.
What Mississippi Residents Should Know
Wet snow can weigh down trees and power lines, increasing the potential for damage and outages.
Freezing rain can create dangerous road conditions even when snowfall totals remain low.
Travel conditions can change quickly along Interstate 20, Interstate 22 and Interstate 55, especially on bridges and overpasses.
Understanding snow to liquid ratios helps explain why snowfall estimates can change even when expected moisture amounts remain similar.
For Mississippi residents, winter storm impacts depend on more than precipitation alone. Temperature, storm tracks and snow density determine whether moisture becomes rain, ice or accumulating snow.