(Ground blizzard, North Dakota, I-94. The videographer notes, "between Bismarck and Fargo on Jan. 7, 2011. Temperature near zero, north wind at 30 to 40 mph, visibility not good. We had to watch for cracks in the pavement because we couldn't see the lanes."
ground blizzard--Ground blizzards occur when it is not snowing. The day may even be sunny, but if you are in a ground blizzard, you would have to look up to notice. During a ground blizzard, wind blows already fallen snow, so that at ground level, you seem to be in a blizzard. This is most likely to happen after a fresh snowfall in open areas where the ditches on either side are already full of snow.
Visibility is poor to nonexistent, making ground blizzard conditions very dangerous. Driving, you cannot see vehicles or obstacles ahead or around you. When the wind whips the snow across the road, you cannot see if the pavement is slick.
Recent northern South Dakota ground blizzard conditions caused 150 motorists, many of them semi drivers, to be stranded on I-29 for up to 48 hours! Thank goodness for this little oasis. Here's the scene on the highway, from a news station's helicopter:
(example of finger drifts)
finger drifts--Finger drifts occur when wind blows snow across the road over a period of time and the snow builds up with horizontal "fingers" stretching into the road. Easy to pass through when fresh, after the wind has whipped them into shape, they become hard as rocks and can cause considerable damage to vehicles who ram them.
(from http://www.geograph.org.uk/photo/807648, Coed conwydd yn cysgodi Moel yr Iwrch / Conifers sheltering Moel yr Iwrch for SH8354, © Copyright Ceri Thomas and licensed for reuse under this Creative Commons Licence)
shelter belt--Sometimes called a "wind break," a shelter belt is an area of planted tree rows, often around a country farmstead, to protect it from the wind. The example photo above is in Great Britain.
What special climate or weather teminology do you use in your region?
