June 14, 2010
Photographer: Stu Witmer
Summary Author: Stu Witmer
On a recent visit to the Hart Mountain National Antelope Refuge in Oregon’s High Desert I ran into a good deal of snow mostly in the form of graupel flurries. Graupel is a form of snow in small, granular pellets. Graupel forms when ice crystallizes on a snowflake creating a coat of rime. Sometimes called “soft hail” graupel, unlike hail, falls apart when touched. Also unlike hail, graupel does not need a thunderstorm updraft to develop.
Main picture: Camera Maker: Nikon; Camera Model: Nikon E5700; Image Date: 2010-04-29 12:25:58; Focal Length: 15.7mm; Aperture: f/8.0; Exposure Time: 1/626sec; ISO equiv: 200; Exposure Bias: none; Metering Mode: spot; Exposure Mode: normal; Flash Fired: No (Manual).
Inset is the same except: Image Date: 2010-04-29 12:26:38; Focal Length: 8.9mm; Aperture: f/5.6; Exposure Time: 1/329 sec