Frost patterns

 

This is the time of year to watch for patterns in frost. Viewing is best around sunrise following a clear night.

The patterns of frost, dew, and snow melt have been discussed other years (e.g., IR snow melt) and so explanations will not be repeated.

These are footprints on a sandy beach. The frost-covered ridges are colder than the valley floors.

The frost-covered lawn surrounding a small tree is colder than that under the tree.

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