Why was there black smoke in sky of Cairo like that on Sunday !? It was too obvious even at night. Do not know the reason.
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This is very likely an upper level condensation sheared by the wind. It doesn't look like a plane exhaust or fire. The colour is due to the twilight effect of the setting sun.
The Jetstream (upper level winds) is a bit active over Northern Egypt and there is a bit of humidity up high (160 km/hr) at 10km altitude and humidity > 40%. It goes from West -> East.
Apparently you were also driving, in an East -> West direction, parallel to the cloud as well.
Data sources: Weather Balloon: http://weather.uwyo.edu/cgi-bin/sounding?region=mideast&TYPE=TEXT%3ALIST&YEAR=2016&MONTH=02&FROM=2900&TO=2900&STNM=62378
Upper wind map (as of 2am 29/2/2016, updated daily): pamola.um.maine.edu/fcst_frames/GFS-025deg/DailySummary/GFS-025deg_WORLD-CED_WS250.jpg
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This is very likely an upper level condensation sheared by the wind. It doesn't look like a plane exhaust or fire. The colour is due to the twilight effect of the setting sun.
ReplyDeleteThe Jetstream (upper level winds) is a bit active over Northern Egypt and there is a bit of humidity up high (160 km/hr) at 10km altitude and humidity > 40%. It goes from West -> East.
Apparently you were also driving, in an East -> West direction, parallel to the cloud as well.
Data sources:
Weather Balloon: http://weather.uwyo.edu/cgi-bin/sounding?region=mideast&TYPE=TEXT%3ALIST&YEAR=2016&MONTH=02&FROM=2900&TO=2900&STNM=62378
Upper wind map (as of 2am 29/2/2016, updated daily): pamola.um.maine.edu/fcst_frames/GFS-025deg/DailySummary/GFS-025deg_WORLD-CED_WS250.jpg
Here they are properly linked.
ReplyDeletehttp://weather.uwyo.edu/cgi-bin/sounding?region=mideast&TYPE=TEXT%3ALIST&YEAR=2016&MONTH=02&FROM=2900&TO=2900&STNM=62378
and
pamola.um.maine.edu/fcst_frames/GFS-025deg/DailySummary/GFS-025deg_WORLD-CED_WS250.jpg
I am surprised that Z's readers are so well versed in meteorology.