A Scottish farmer witnessed the bizarre phenomenon while tending to his sheep this week.
Moderate snow was falling at the time amid an Arctic blast that’s forced school closures and prompted the issuance of alerts from the U.K. Met Office. A yellow warning for snow and ice remains in effect for the Shetland Islands and the remainder of mainland Scotland until Friday morning.
“Some roads and railways likely to be affected with longer journey times by road, bus and train services,” they wrote. “Some injuries from slips and falls on icy surfaces [are possible, and] probably some icy patches on some untreated roads, pavements and cycle paths.”While video alone isn’t usually enough to fully explain the dynamics behind a vortex, in this case we can make a couple observations.
Therefore, while we can’t conclude definitively, we can assert it probably was a tornado rather than a run-of-the-mill snow whirl. It’s unclear if any damage was reported, but a rough eyeball estimate from the video would put winds in the sub-90 mph range.A strong updraft has to be present to vertically stretch a vortex and form a tornado. Robust updrafts are tough to come by in the wintertime, since rarely is sufficient relative warmth and moisture available for a cloud to grow vertically.
However, on Monday, a small low pressure system worked east through the North Sea, tugging frigid air from the Arctic southeast in its wake. This bone-chilling air passed over lukewarm waters. Air heated by the milder waters below rose into the cold air mass above, forming pockets of snow showers. That could explain how enough upward motion was present to cook up a tornado.It’s impossible to know if this was a mesocyclonic tornado or a landspout, however.
A tornadic waterspout came ashore on the snow-covered island of Andros in Greece on Monday. Yep, it’s a
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