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WeatherMatrix
© 2002 WeatherMatrix.Net - Redistribution
Prohibited. Usage logged.
From: Jesse Ferrell (WeatherMatrix) (jesse{at}weathermatrix.net)
Date: Wed Feb 12 2003 - 13:01:16 EST
Last time I posted this it was 3 years ago in Kansas, course they probably
happen more frequently than that.
http://www.cybervox.org/archive/stormreports/200012-200101/0142.html
PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
1040 AM EST WED FEB 12 2003
...SNOW ROLLERS OCCURRED IN CENTRAL INDIANA LAST NIGHT...
THE NATIONAL WEATHER SERVICE AT INDIANAPOLIS HAS RECEIVED NUMEROUS
REPORTS OF A PHENOMENA KNOWN AS SNOW ROLLERS THIS MORNING. SNOW
ROLLERS ARE WHERE THE WIND LITERALLY BLOWS THE SNOW INTO A ROLL.
SNOW ROLLERS LOOK VERY MUCH LIKE A ROLL MADE WHEN SOMEONE CONSTRUCTS
A SNOWMAN...ONLY THEY HAVE A NATURAL CAUSE.
THE FORMATION OF SNOW ROLLERS REQUIRES BOTH A STRONG WIND AND SNOW
WITH JUST THE RIGHT TEXTURE. IF SNOW IS TOO POWDERY IT DRIFTS
WITHOUT ASSUMING ANY DEFINITE SHAPE. IF SNOW IS TOO WELL PACKED THE
WIND HAS NO EFFECT ON IT.
POWDERY SNOW FELL ON CENTRAL INDIANA TUESDAY MORNING. DURING THE
DAY THE SNOW SETTLED INTO A TEXTURE THAT COULD KEEP SHAPES...BUT WAS
STILL PLIABLE ENOUGH TO BE MOVED AROUND BY THE WIND. WHEN THE WIND
PICKED UP LAST NIGHT...SNOW ROLLERS WERE ABLE TO FORM.
SNOW ROLLERS ARE NOT VERY COMMON IN INDIANA BECAUSE OUR SNOW TENDS
NOT TO BE THE RIGHT TEXTURE...IT IS USUALLY WETTER AND MORE DENSE.
ALSO WINDS STRONG ENOUGH TO CAUSE ROLLERS ARE NOT THAT COMMON IN THE
HOOSIER STATE. ONLY RARELY DO RIGHT WINDS AND THE RIGHT SNOW TEXTURE
COME TOGETHER.
$$
KWIATKOWSKI
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