On Thursday, 16 April 2015 18:16:01 UTC+1, Graham P Davis wrote:
Picture of beautiful K-H clouds over Essex.

http://www.bbc.co.uk/weather/feature...e=news_central
Spotted this when it was tweeted by Steph Ball a few minutes ago.

--
Graham P Davis, Bracknell
Anti-intellectualism has been a constant thread winding its way through
our political and cultural life, nurtured by the false notion that
democracy means that 'my ignorance is just as good as your knowledge.'
- Isaac Asimov.

Nice, but I strongly suspect a hoax. The conditions for K-H waves are simply not there. The Herstmonceux ascent for 12Z 15th April shows very little wind shear. Also, the humdity is too low.

http://weather.uwyo.edu/cgi-bin/soun...512&STNM=03882

Tudor Hughes, Warlingham, Surrey.