Weather
Oklahoma Snow: Why 20 Inches Can Start With Just 1 Inch
Oklahoma City, OK – Winter storms across Oklahoma can produce dramatically different snowfall totals, even when communities receive nearly identical amounts of moisture. From Oklahoma City to Tulsa, j
By Rachel Monroe · 2026-11-10T07:55:49.004Z
Oklahoma City, OK – Winter storms across Oklahoma can produce dramatically different snowfall totals, even when communities receive nearly identical amounts of moisture. From Oklahoma City to Tulsa, just 1 inch of liquid precipitation can sometimes produce 5 inches of heavy, wet snow or as much as 20 inches of lighter, fluffier snow.
The difference comes down to the snow to liquid ratio, which measures 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.
Oklahoma's changing winter temperatures can create a wide range of snowfall densities, although colder conditions do not automatically guarantee higher ratios.
Oklahoma City and Tulsa: Why Snowfall Can Differ
Oklahoma City, located in central Oklahoma, frequently experiences winter weather systems moving across the southern Plains.
Tulsa, farther northeast, can encounter different temperatures and precipitation amounts depending on a storm's track.
A shift in the path of a winter storm can determine whether one metropolitan area receives accumulating snow while another experiences sleet, freezing rain or rain.
Cold Arctic air moving south across the Plains can also influence precipitation type and snow density.
In western Oklahoma, higher elevations and generally drier conditions can further affect winter precipitation.
What Oklahoma Residents Should Know
Heavy, wet snow can weigh down trees and power lines, increasing the potential for damage and outages.
Lighter, fluffier snow can become airborne during strong winds, reducing visibility and creating drifting snow.
Freezing rain is another major concern because ice can make roads dangerous even when snowfall totals remain low.
Travel conditions can deteriorate quickly along Interstate 35, Interstate 40 and Interstate 44, particularly on bridges and overpasses.
Understanding snow to liquid ratios helps explain why snowfall forecasts can change even when expected moisture amounts remain similar.
For Oklahoma residents, winter storm impacts depend on more than snowfall depth. Temperature, wind, storm tracks and precipitation type all influence accumulation and travel hazards.