The way our weather twists and turns can catch out even the most experienced meteorologist, as Michael Fish found out to his cost, following his infamous broadcast on Thursday 15 October 1987.
He stated "Earlier on today, apparently, a woman rang the BBC and said she heard there was a hurricane on the way... well, if you're watching, don't worry, there isn't!"
Operation Overlord, June 5th 1944. All the factors have been accounted for, apart from the weather. 350,000 lives depend on the most important forecast of the 20th century.