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Credit & Copyright: Dan Bush
(Missouri Skies)
Explanation:
What kind of cloud is this?
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 in the
summer of 2005 above
Albany,
Missouri,
USA.
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NASA Web Site Statements, Warnings, and Disclaimers
NASA Official: Jay Norris. Specific rights apply.
A service of: LHEA at NASA / GSFC
& Michigan Tech. U.
Based on Astronomy Picture
Of the Day
Publications with keywords: clouds
Publications with words: clouds
See also:
- Nacreous Clouds over Sweden
- APOD: 2024 November 19 Á Undulatus Clouds over Las Campanas Observatory
- APOD: 2024 July 7 Á Iridescent Clouds over Sweden
- APOD: 2023 August 20 Á A Roll Cloud Over Wisconsin
- APOD: 2023 February 12 Á Mammatus Clouds over Nebraska
- Nacreous Clouds over Lapland
- A Retreating Thunderstorm at Sunset