http://epod.usra.edu/blog/2014/11/un...guatemala.html
Shea Gibson of Weatherflow/ikitesurf tells about this unusual cloud form, the first "new" cloud type to be proposed since 1951.
It is interesting to see the gust front stretch the bounds of the formation outward in the animated radar image below.
The gust front seemed to be massive, extending over an approximate 100 mile wide by 60 mile long (W to E) area.
Over to Shea ...
"Undulatus Asperatus clouding raises eyebrows in the SE Region.
Posted on March 31, 2015 by WeatherFlow Forecaster
by Weatherflow meteorologist Shea Gibson
On March 30, 2015, Mother Nature put on quite a show in the lowlands of SC and GA as a relatively new classification of cloud types called Undulatus Asperatus (Latin for “agitated waves”) rippled through the sky – appearing as rolling waves with incredible marbling effects. These are often known to follow in the wake of storm systems and are fairly well known in the Plains states. However, these developed ahead of a cold front approaching the Southeast Regional Coastline. Roll Clouds (rare) and Gravity Waves also appeared to be mixed in for a few extra visuals.
Here is the cold front approach with a gust front (fast moving outflow of cold air from storming) pushing ahead through to the coast and fizzling out. This is what caused the rippling/waving effects as the colder air pushed into a layer of warm air aloft suspended atop cooler, more stable air below:
If you watch closely in the center of the radar gif where the small + symbol is, you can see a “puff” surge forward towards the coast in an outward arc. That is the gust front. "
Be sure to checkout the rest of the article including video clips of this waving cloud form at:
http://blog.weatherflow.com/undulatu...the-se-region/
.