Warm-ish days (slightly above freezing), cold nights, and plenty of ground moisture are the recipe for "ice needles" - thin needles or ribbons of ice rising up from the ground. (For a full discussion of ice physics and many astounding photos of this phenomenon, see an article by James Carter in the September-October 2013 issue of American Scientist, pages 360-369.)
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| Ice needles emerging from dirt. |
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| A closer look at the needles. |
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| Another clump of ice needles. |
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| As the day warmed, ice needles start to melt. |
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| A final view of another clump of melting ice needles. |
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