On Thursday, Jan. 7, parts of the Superior area were coated in rime ice.

Rime ice occurs when supercooled droplets from fog freeze and attach to an exposed surface. Rime ice can be classified as either hard or soft and will generally depend on the wind strength. Hard rime ice is very dense, and makes trees appear to be flocked with crystals. This occurs due to freezing fog when wind speeds are high, and temperatures range from 17-28°F.

A woman walks her dog under a branch covered in rime ice outside of Northern Lights Elementary Thursday, Jan. 7. (Jed Carlson / jcarlson@superiortelegram.com)
A woman walks her dog under a branch covered in rime ice outside of Northern Lights Elementary Thursday, Jan. 7. (Jed Carlson / jcarlson@superiortelegram.com)

Needles are covered with rime ice outside of Northern Lights Elementary Thursday, Jan. 7. (Jed Carlson / jcarlson@superiortelegram.com)
Needles are covered with rime ice outside of Northern Lights Elementary Thursday, Jan. 7. (Jed Carlson / jcarlson@superiortelegram.com)

Trees are covered with rime ice outside of Wessman Arena in Superior Thursday, Jan. 7. (Jed Carlson / jcarlson@superiortelegram.com)
Trees are covered with rime ice outside of Wessman Arena in Superior Thursday, Jan. 7. (Jed Carlson / jcarlson@superiortelegram.com)

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Needles are covered with rime ice outside of Northern Lights Elementary Thursday, Jan. 7. (Jed Carlson / jcarlson@superiortelegram.com)
Needles are covered with rime ice outside of Northern Lights Elementary Thursday, Jan. 7. (Jed Carlson / jcarlson@superiortelegram.com)