It’s Frosty… no not the Snowman

windowfrostfrost-flower-4d_hoarfrost_31When you wake up in the morning, walk outside, and see our car covered in frost you probably just quickly scrape off your windows. Next time, take a closer look and you might just see some cool patterns.

Frost forms when the air temperature is below freezing and suspended fog or mist droplets stay super-cooled and unfrozen. When they hit a suitable surface like trees, bushes, and even car windows they freeze. As they freeze the icy surface provides a center for further droplet crystallization to give these unusual formations.

Types of frost include:  radiation, advection, frost flowers, window/fern frost, and rime.


Posted under weather

This post was written by qni_it on December 29, 2009

1 Comment so far

  1. FSU December 29, 2009 12:04 PM

    My wife and I were just talking about how pretty the rime ice used to be when we lived outside of Asheville, NC. It was a fairly common occurence there and looking up at the mountains from our home in Reems Creek Valley was always interesting to see how far down the frost line had ventured during the previous night. We’d sometimes drive the extra couple of miles up to the Blue Ridge Parkway to enjoy the scenery on the way into town, instead of taking the highway. We really do miss those mountains…

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