Needle ice on lake surface - GIF

Needle ice on lake surface.

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Previously:

https://www.homemadetools.net/forum/...454#post204944
https://www.homemadetools.net/forum/...525#post201034
https://www.homemadetools.net/forum/...150#post195580
https://www.homemadetools.net/forum/...482#post200808
https://www.homemadetools.net/forum/...711#post174712

I remember needle ice on winter mornings when a wet spot of ground would freeze, and the needles would poke up in a cluster. I had no idea that could happen on a body of water, though. I wonder how it forms and whether it's a precursor to solid ice.

Quote:

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Originally Posted by schuylergrace

I remember needle ice on winter mornings when a wet spot of ground would freeze, and the needles would poke up in a cluster. I had no idea that could happen on a body of water, though. I wonder how it forms and whether it's a precursor to solid ice.

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It looked like the needles grew as the slushy ice was disturbed by the shovel. by breaking up the surface and exposing more water to fridged air.

One rare breakup on a large nearby lake the wind pushed the ice to one shore, where ice floes climbed atop one another being pushed by the ice pack, making a mound 30 feet high and encroaching the shore. a very rare occurrence.