Everything you ever wanted to know about the white stuff
13 April 2012
●Snow forms in clouds when the temperature is below freezing a rare occurrence in London because urban heat can make it up to 5C hotter than the surrounding areas
●Ice crystals become snowflakes when they fall through the cloud and bump into others, melting and re-freezing to create a complex design
●The earliest snow of the year recorded in London was on 25 September 1885
●The heaviest October snow to fall on London was on 25 October 1926 two inches fell on the capital
●In January 2003, London had its heaviest snowfall, about an inch, in more than 10 years
