Strange hole in cloud, page

I had to edit my previous statment when I said that it appears to be the center of a low pressure area. I captured this image from weather.com:

www.w3.weather.com...

The snapshot taken at 12:18 GMT (approximately 1 1/2 hours after your picutre was taken) shows a small "hole" over the vicinity of London.

I'm not familiar with the geography of London. Is there a large body of water in the direction you took the picture? What could cause that hole is an area of relatively warmer air, casued by the land/water mass below, that allows the absorption of water molecules in that specific area.

[edit on 18-12-2004 by Freedom_for_sum]

[edit on 18-12-2004 by Freedom_for_sum]

Also, this chart, which is a surface analysis was taken at 1200 GMT.

129.13.102.67...

It shows the area over Great Brittain (located right of center of the chart) to be relatively benign (Light winds, stable air mass) further emphasising in my mind that surface heating caused the "hole" in the clouds.

And here is another explanation...

epod.usra.edu...

Given the temp you guys have over there, this seems very plausible

Here are a few more i found


I also read on this BBC webpage that the falling ice crystals that could be to blame could come from the exhausts of passing aircraft. That would make sense because there are a lot of planes fly over

www.cyberspaceorbit.com...

Here's a link to what I was thinking of, if you go down about 3/4 of
tha page, where it says "Florida Gets Pulsed" you'll see what I mean.

Try having a look at this website on earthquake predictions from cloud formations. I don't know if this type of cloud formation is an earthquake precursor, but you can have a look and see if it gets listed there.

quake.exit.com...



[edit on 18-12-2004 by mayajeet]

antwrp.gsfc.nasa.gov...

Rare, but not unusual.

Originally posted by HowardRoark
antwrp.gsfc.nasa.gov...

That cloud "inside" hole is definitely virga.


I took this photo at spring 2003. There's little signs of more turbulence in two a'clock from hole, so I think that might give hint about direction light route.
Also these holes seems to be ellipses which would be reasonable. Aircraft causes like cylinder of turbulent air, when plane (layer of humid air) cuts it in other angle than straight result is ellipse.



Here's more of these phenomenons what aircrafts cause to clouds.
www.weather-photography.com...

A distrail, short for dissipation trail, forms when an aircraft flies through a supercooled cloud. The cloud freezes due to the disturbing airflow created by the aircraft, as well as by the addition of plenty of freezing nuclei due to the aircraft's exhaust gases. Altocumulus is usually either frozen or supercooled and can show distrails. They are uncommon, especially the clear distrails. Distrails are usually not very long, since they usually show in altocumulus which is not at a cruising altitude of the aircraft (i.e. the aircraft is either descending or ascending through the cloud). In some cases a distrail may transform into a cloud hole: a large elliptical hole in altocumulus with virga in the middle.

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