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atmospheric phenomena november 2007 skip to main skip to sidebar atmospheric phenomena of recently observed interesting atmospheric phenomena around the world wednesday november 28 2007 st elmo s fire in switzerland on nov 14 2007 between 18 00 and 19 00 cet st elmo s fire appeared on a tower at the summit of mt gäbris in switzerland the phenomenon was captured with a high sensitive video camera operated by mark vornhusen of meteomedia a private weather company there is a 25m metallic tower located on the summit of mt gäbris 1241m three webcams are fixed on top of the tower looking in different directions one of these cameras shows a part of the tower a metallic extension arm in the outermost right corner of the image st elmos s fire became visible at this extension arm the st elmo s fire developed during a snow thunderstorm only one lightning strike occurred during this storm the strike is visible on the webcam images at 18 55 cet as a sudden flare of the image and was heard by the author who lives 2km away from the summit the lightning strike was not close to the tower because the flare was not very bright the cameras operate with a special software that is able to capture all bright objects on the night sky even if the duration is only a fraction of a second lightning meteors the st elmo s fire was first visible on the webcam images at 18 05 cet and lasted about two minutes the second and most intense appearance occurred between 18 40 and 18 50 cet followed by the lightning strike at 18 55 during the 10 minute interval between 18 40 and 18 50 cet the weather station which is also located on top of the tower measured a wind gust of 75 m s 270 km h this is obviously not a real wind speed more likely it is an interference of the high voltage and the st elmo s fire to the anemometer the ultrasonic anemometer uses sound speed to measure the wind speed http thiesclima de usanemo htm to the authors knowledge it seems to be the first time ever st elmo s fire was imaged at least a classic one that occurred on the ground and not during a flight on an airplane posted by mark vornhusen at 7 20 pm 4 comments monday november 26 2007 animal optics in this blog we have already seen photos of spiderwebs scattering rays of light and even a thistle seed showing spectral colours now i would like to contribute to this collection with another possible source for observing this optical phenomenon cat s hair the pictures attached show the dark sámán of mónika landy gyebnár and the white manci my cat when light comes from the appropriate angle their fur can display the colours of the rainbow surprisingly clearly please click the images to see it better full size photos of sámán s and manci s shining hair are also available the other photo is another animal test given that birds feathers have a very regular structure i was interested whether they show corona like diffraction if we place one in front of a light source i found that the repetitive structure of barbs barbules and tiny hooks interlocking on them create beautiful interference patterns this picture somewhat out of focus shows an owl s feather a secondary from its wing with a lamp behind it the pattern is curved because the feather itself has a bent surface further images 1 2 3 posted by ágnes kiricsi at 5 50 pm no comments thursday november 22 2007 fog shadow of tv tower in san francisco fog shadow of sutro tower san francisco these fascinating shadows look odd since humans are not used to seeing shadows in three dimensions the thin fog was just dense enough to be illuminated by the light that passed through the gaps in a structure or in a tree as a result the path of an object shadow through the fog appears darkened in a sense these shadow lanes are similar to crepuscular rays which are caused by cloud shadows but here they re caused by an object shadows posted by mila at 1 22 am 2 comments tuesday november 20 2007 a strange kind of glory i have often seen glories which appeared to be elliptical and not circular or vertically disrupted this was always caused by the projection onto an uneven cloud cover but on november 18 2007 i could observe a vaulted glory from mt wendelstein 1835m in the bavarian alps the strange glory appeared in an isolated stratocumulus cloud which adapted to the shape of a mountain its colours ended irregularly on its outer fringe like those of a glory around the sun which pass over to cloud iridescence there is no circular shape recognizable in the colours outside the inner glory rings the pictures are taken using a polarization filter and the contrast has been increased another observation which might be related to mine has been made on january 01 2007 by stefan rubach on mt großer arber posted by claudia hinz at 3 31 pm no comments sunday november 18 2007 perspectively broken shadow when there are swelling cloud parts on the surface of an unbroken cloud cover it sometimes can happen that the shadow of a pole projected onto this cloud cover appears kind of broken i could observe such a shadow broken perspectively on august 18 2007 at 18 15 hours cet on the top of mt wendelstein 1835m when the shadow of the transmitting aerial of the bavaria broadcast fell upon such a cloud cover surrounded by a glory which appeared three dimensional posted by claudia hinz at 11 33 am no comments newer posts older posts home subscribe to posts atom your observation if you have observed one of the atmospheric phenomena listed up here you can write to this address or contact one of the blog contributors blog archive 2011 2 may 1 april 1 2010 15 november 3 july 1 may 1 april 3 march 2 february 3 january 2 2009 20 november 3 september 2 august 3 july 4 june 1 april 1 february 2 january 4 2008 22 october 1 september 1 august 5 june 1 may 2 april 2 march 1 february 7 january 2 2007 34 december 3 november 5 st elmo s fire in switzerland animal optics fog shadow of tv tower in san francisco a strange kind of glory perspectively broken shadow october 2 september 12 august 2 april 4 march 2 february 3 january 1 2006 46 december 1 november 2 october 9 september 7 august 1 july 1 june 5 may 19 april 1 reference pages arbeitskreis meteore e v germany atmospheric optical phenomena section finland atmospheric optics by les cowley optics of the atmosphere czech halo reports