Sleet: Meaning, Origin & Winter Safety Guide
Quick Definition (Meteorology & Weather Alerts)
Small, translucent balls of ice that bounce and clatter when they hit windows, coats, and pavement, formed when melted snowflakes refreeze in a deep layer of below-freezing air before reaching the ground.
Also called: ice pellets, winter sleet
If you only do three things
- Listen for the distinctive 'pinging' sound on windows to tell sleet apart from snow.
- Shovel sleet early before it freezes into a solid, un-shovelable concrete crust.
- Increase driving following distance to 8–10 seconds on sleet-covered pavement.
Origin, meteorology & what "Sleet" means
Tracing back to the Middle English word 'slete', sleet in American meteorology specifically refers to ice pellets (METAR code PL), whereas in British English 'sleet' often describes a slushy mix of falling rain and snow.
Unlike hail (which forms in summer updrafts), sleet forms in winter when snowflakes partially or fully melt in a warm layer aloft and then fall through a thick cushion of sub-freezing air that freezes them into hard BBs before impact.
Real-world winter safety & what to do
While sleet provides slightly more initial traction than sheet-like freezing rain, accumulated sleet acts like millions of tiny ball bearings under tires and shoes.
Shovel sleet off steps and driveways before overnight temperatures drop, because packed sleet welds together into an almost unbreakable slab of ice.
Frequently asked questions about Sleet
Is sleet safer than freezing rain?
Yes, for trees and power lines — because sleet bounces off branches instead of clinging to them, it rarely causes the massive power outages of an ice storm.
What is the difference between sleet and hail?
Sleet falls during cold winter storms when melted snow refreezes near the ground; hail forms inside warm-season thunderstorm updrafts.
Related situational guides
- First-Time Snow & Ice Guide: How to tell snow, sleet, graupel, and freezing rain apart.
- Shoveling & Ice Melt Guide: How to clear sleet and apply de-icer effectively.