What is the Difference Between Sleet and Freezing Rain?

The main difference between sleet and freezing rain lies in the process of their formation and their impact on the ground. Here are the key differences:

• Formation: Sleet occurs when snowflakes partially melt as they fall through a shallow layer of warm air. These slushy drops then refreeze as they fall through a deep layer of freezing air above the surface, eventually reaching the ground as frozen rain drops that bounce on impact. On the other hand, freezing rain occurs when snowflakes descend into a warmer layer of air and melt completely. These liquid water drops then fall through another thin layer of freezing air just above the surface, not having enough time to refreeze before reaching the ground. They instantly refreeze upon contact with any object at or below freezing temperatures, creating a glaze of ice.
• Impact on the ground: Sleet can accumulate on the ground much like snow, depending on the intensity and duration. Freezing rain, however, creates a coating of ice on the ground, trees, power lines, or other objects when the supercooled raindrops instantly refreeze on contact. Even light accumulations of freezing rain can cause dangerous travel, while heavier amounts can cause significant damage to trees and power lines.

Both sleet and freezing rain are hazardous for travelers, as the ice they create can cause slick spots on roadways, making it difficult for motorists to maintain control of their vehicles. Additionally, the ice caused by freezing rain can rapidly add weight to tree branches and power lines, causing them to snap or break.

Comparative Table: Sleet vs Freezing Rain

The main difference between sleet and freezing rain lies in the way they form and their impact on the ground. Here is a comparison table highlighting the key differences:

Both sleet and freezing rain are hazardous for travelers, as they can create slick spots on roadways, causing motorists to lose control of their vehicles with little to no warning. Bridges, overpasses, and elevated roadways are especially susceptible to icing as they are surrounded on all sides by cold air.