Super Cold, Super Cooled

The erratic weather of March helps explain why the definition of “snow” isn’t as simple as one might think. Yesterday morning I discovered a light coating of “graupel”, one of the many types of snow.

The morning temperature at ground level was in the low teens. Cold!!! That night, super-cooled water droplets in the cloud layer had coated snowflakes, which then fell as tiny white balls called graupel (also soft hail, snow pellets).

TurkeyTailGraupel19Mar16#7264E8c8x10

Graupel and frost on Turkey Tail mushroom

MossGraupel19Mar16#7253E2c4x6

Graupel and frost on moss and leaves

MossGraupel19Mar16#7314E2c5x7

Graupel and frost on a moss-covered log

Photos by NB Hunter 19March2016. © All Rights Reserved.

 

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