Category: clouds

Rare “roll cloud” appears in the Memphis sky

May 26, 2015

–

Erik Proseus

–

clouds, roll cloud, weather pics

So I was driving into work this morning and saw this… A roll cloud! It extended north/south as far as I could see and was moving east across the city. I kept an eye on it before it disappeared over the eastern horizon. These pics have gotten a fair bit of attention on our Facebook,…
Read more
MWN Lightning Round: weekend forecast, holes in the clouds, and NWS on Twitter

September 26, 2014

–

Erik Proseus

–

clouds, forecast discussion, lightning round, Twitter

The MWN Lightning Round is back with three topics for this fabulous fall Friday! 1. First, and most important, the weekend forecast! Lots of activities again going on around town this weekend as fall gets into full swing. The weather will cooperate for most of them, but it will be warm with slightly increased humidity…
Read more
Cloud pics from this morning’s weather system

September 21, 2012

–

Erik Proseus

–

clouds, weather pics

MWN meteorologist Erik Proseus took the pics below of some fascinating clouds that occurred behind an outflow boundary that moved through the area this morning. The waves in the clouds were likely formed as the outflow disturbed the wind flow in a stable atmospheric layer, creating some very interesting patterns in the sky! Following these…
Read more
What is an outflow boundary or gust front?

July 27, 2012

–

Erik Proseus

–

clouds, education, gust front, outflow boundary, shelf cloud

The question has come up numerous times the past few times we’ve had storms in the Mid-South: “What is a gust front / outflow boundary?” On our social media channels, we often refer to these features during nowcasting stints as they are an important part of the life cycle of summertime (especially) storms and can…
Read more
Altostratus Undulatus (wavy clouds!) visit the Mid-South

November 16, 2011

–

Erik Proseus

–

clouds

This afternoon as the weather system that has been plaguing the Mid-South for a couple of days was departing, atmospheric conditions came together to produce some stunning clouds. After researching the conditions, the pictures received, and observing the clouds firsthand, I came to the conclusion that these were undulatus clouds, or more specifically Altostratus Undulatus.…
Read more
Video time-lapse of asperatus clouds

August 15, 2010

–

Erik Proseus

–

asperatus, clouds

For those who follow weather closely, you may have heard of a newly-recognized cloud type over the past year or two. This cloud type, officially called undulatus asperatus, or just asperatus (roughly meaning “roughened” or “agitated waves”), was proposed to be classified as a separate cloud type in 2009 by the founder of the Cloud…
Read more
Interesting cloud phenomena to start the day

May 18, 2010

–

Erik Proseus

–

clouds, satellite

Did you see it? If you’re not an avid weather watcher, or even if you are, you may have missed it. Just after sunrise this morning (Tuesday, May 18), a narrow band of stratus clouds set up over eastern Shelby County extending from north to south. From the pictures taken below (minus the surrounding landscape),…
Read more
Pyrocumulus in northern Shelby Co.

July 1, 2009

–

Erik Proseus

–

clouds, weather pics

A very interesting occurrence took place late this afternoon over northern Shelby County. A large fire (of unknown origin) produced enough heat and smoke to create pyrocumulus clouds above the fire. The first picture was taken from many miles away (I-40 and Jackson Ave.) looking north-northeast. The next 3 pictures were taken in sequence over…
Read more
New cloud type?

June 16, 2009

–

Erik Proseus

–

clouds, weather pics

An Iowa woman’s photo from 2006 have scientists and others debating whether a new cloud type has been discovered. There currently are only three main cloud types: cumulus, stratus, and cirrus. One group is working with the Royal Meteorological Society to prepare a case for the World Meteorological Organization to get them classified as a…
Read more