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Credit & Copyright: Jeff Kerr
Explanation:
Perhaps it's time to go inside.
Such thoughts might occur to people witnessing the approach of an impressive
shelf cloud.
Shelf clouds are typically seen leading
thunderstorms,
although they may
precede
any well defined front of relatively cold air.
Shelf clouds
differ from
roll clouds
because shelf clouds are attached to a larger cloud system lurking above.
Similarly, shelf clouds
differ from wall clouds because wall clouds typically trail
storm systems.
The above pictured
shelf cloud
was photographed toward the southwest during a trip crossing the prairies of
Saskatchewan,
Canada on the
Trans-Canada Highway
in 2001 August.
A rising Sun illuminated the
impressive cloud from the east as it advanced from the
west.
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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:
- 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
- A Fire Rainbow over West Virginia