On the evening of March 31st, 2009, Tim Tevebaugh was driving home
from work east of Craigmont in the southern Idaho Panhandle (see map
below). Across the rolling hay fields, Tim saw a very usual phenomenon.
The snow rollers that he captured in these pictures are extremely rare
because of the unique combination of snow, wind, temperature and moisture
needed to create them. They form with light but sticky snow and strong
(but not too strong) winds. These snow rollers formed during the day as
they weren't present in the morning on Tim's drive to work.
http://www.wrh.noaa.gov/otx/photo_gallery/snow_rollers.php
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