How frost forms when the temperature is above 32 degrees

How to tell the difference between snow, sleet and freezing rain

Dew Point vs Frost Point, Schnack's Weather Blog

Frost & Freeze Tomorrow, Temperature Maps

Eight tips to avoid the dangers of black ice

Science Behind Precipitation Types - Why It's Such a Forecasting Headache

Weather Blog: How Does Frost Form?

How frost forms and the different types

Wx Watch: Freezing Rain Facts - AOPA

Winter Precipitation: A Review

Seattle weather: How are freezing rain, sleet and hail different?

How it can snow above 40 degrees - The Washington Post

Science of Snow National Snow and Ice Data Center