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Astronomy Picture of the Day
A Roll Cloud Over Missouri
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zorg.ch
#83489
by
[z]Barbara Harris
@
18.01.2006 00:00
- nach oben -
A Roll Cloud Over Missouri
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
.
Credit & Copyright
zorg.ch
#83494
by
hans
@
18.01.2006 07:38
- nach oben -
independence day, doch wo blibt dä will smith?
zorg.ch
#83499
by
Cédi
@
18.01.2006 08:50
- nach oben -
het de falsch chnopf druckt, etz isch sin charre wiss worde und hetten igsperrt. isch gad am flueche und alli andere chnöpf drucke.