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Astronomy Picture of the Day -- Roll Cloud Over Wisconsin
NASA ^ | September 08, 2013 | (see photo credit)

Posted on 09/08/2013 11:59:58 AM PDT by SunkenCiv

Explanation: What kind of cloud is this? A type of arcus cloud called a roll cloud. These rare long clouds may form near advancing cold fronts. In particular, a downdraft from an advancing storm front can cause moist warm air to rise, cool below its dew point, and so form a cloud. When this happens uniformly along an extended front, a roll cloud may form. Roll clouds may actually have air circulating along the long horizontal axis of the cloud. A roll cloud is not thought to be able to morph into a tornado. Unlike a similar shelf cloud, a roll cloud is completely detached from their parent cumulonimbus cloud. Pictured above, a roll cloud extends far into the distance as a storm approached in 2007 in Racine, Wisconsin, USA.

September 08, 2013

(Excerpt) Read more at 129.164.179.22 ...


TOPICS: Astronomy; Astronomy Picture of the Day; Science
KEYWORDS: apod; astronomy; science; wisconsin
[Credit: Megan Hanrahan (Pierre cb), Wikipedia]

1 posted on 09/08/2013 11:59:58 AM PDT by SunkenCiv
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To: brytlea; cripplecreek; decimon; bigheadfred; KoRn; Grammy; married21; steelyourfaith; Mmogamer; ...
The Big One

2 posted on 09/08/2013 12:00:31 PM PDT by SunkenCiv (It's no coincidence that some "conservatives" echo the hard left.)
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To: SunkenCiv

Neat! I’ve had ‘shelf clouds,’ which are the younger sibling to these, over my Back Forty. Simply amazing to see! :)


3 posted on 09/08/2013 12:01:20 PM PDT by Diana in Wisconsin (I don't have 'Hobbies.' I'm developing a robust Post-Apocalyptic skill set...)
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To: SunkenCiv

I don’t know. For some reason, that photo reminds me of the time when Brenda and I were in the cab of the pickup after the dance and she wanted to show me her nimbus.


4 posted on 09/08/2013 12:05:43 PM PDT by blueunicorn6 ("A crack shot and a good dancer")
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To: SunkenCiv
There are myriad examples of just such weird cloud formations.
Do Google Image Search "weird cloud formations"


5 posted on 09/08/2013 12:06:20 PM PDT by lbryce (The 22nd Amendment Lives:1142 Days Until America's Greatest Nemesis Gets the Heave "Ho")
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To: SunkenCiv

The first time I saw one of these in Atlantic City, NJ, I thought all hell was going to break loose...scared the wits out of me, as I was driving along the shore line at the time.


6 posted on 09/08/2013 12:19:18 PM PDT by Banjoguy (The Mayor of San Antonio is the smoothest liar I have ever seen.)
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To: SunkenCiv; Hunton Peck; Diana in Wisconsin; P from Sheb; Shady; DonkeyBonker; Wisconsinlady; JPG; ..

Cloud formation over Wisconsin. Anybody know where? It’s just gry and drizzly here. No spectacular clouds in sight.

FReep Mail me if you want on, or off, this Wisconsin interest png list.


7 posted on 09/08/2013 12:20:28 PM PDT by afraidfortherepublic
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To: lbryce

Cumulo nimbus mammatus, I presume, and a most unusual display.


8 posted on 09/08/2013 12:39:12 PM PDT by Elsiejay
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To: SunkenCiv

Never seen one of these in life or pics.

Would be a scary sight!


9 posted on 09/08/2013 12:40:47 PM PDT by G Larry (Let his days be few; and let another take his office. Psalms 109:8)
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To: SunkenCiv

I love the roll clouds! They look so imposing...


10 posted on 09/08/2013 12:44:50 PM PDT by Thorliveshere (I wish I lived in Texas.)
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To: Elsiejay
Google Image Search "Cumulonimbus mammatus"


11 posted on 09/08/2013 12:51:20 PM PDT by lbryce (The 22nd Amendment Lives:1142 Days Until America's Greatest Nemesis Gets the Heave "Ho")
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To: SunkenCiv

Saw one of these once when I was in CO. Very impressive and scary.


12 posted on 09/08/2013 12:54:15 PM PDT by LiberConservative (I took the red pill)
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To: SunkenCiv
It's actually 'wormhole'.
Don't those people know ANYTHING?
13 posted on 09/08/2013 12:54:16 PM PDT by Just another Joe (Warning: FReeping can be addictive and helpful to your mental health)
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To: afraidfortherepublic

2007


14 posted on 09/08/2013 1:07:17 PM PDT by huldah1776
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To: lbryce

Totally awesome! I was just thinking yesterday how clouds are like snowflakes, no two alike. I don’t get out much beyond my back porch. Wonderful clouds this summer.


15 posted on 09/08/2013 1:08:43 PM PDT by huldah1776
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To: SunkenCiv

had to look for more with explanations:

http://www.wired.com/wiredscience/2009/09/clouds/


16 posted on 09/08/2013 1:11:55 PM PDT by huldah1776
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To: huldah1776

Must See Post #11.


17 posted on 09/08/2013 1:13:58 PM PDT by lbryce (The 22nd Amendment Lives:1142 Days Until America's Greatest Nemesis Gets the Heave "Ho")
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To: SunkenCiv

Cool pic!

Throw in a bunch of sharks & it would look like a tsunami scene from a bad sci-fi flick ....


18 posted on 09/08/2013 1:44:15 PM PDT by mikrofon (Bad weather rolling in.)
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To: lbryce

The first photo is of lenticular clouds. The second is mammatus. Mammatus clouds usually follow a thunderstorm and are full of moisture.


19 posted on 09/08/2013 1:57:32 PM PDT by Wiser now (Socialism does not eliminate poverty, it guarantees it.)
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To: huldah1776

LOL. Well, that’s not exactly “breaking news”, is it?


20 posted on 09/08/2013 2:32:26 PM PDT by afraidfortherepublic
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To: afraidfortherepublic

No, but keep looking! I’ve seen the bubble clouds in Missouri. Weird.


21 posted on 09/08/2013 8:25:11 PM PDT by huldah1776
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