We've become used to saying 'yet another Atlantic storm'. But what constitutes a storm in your opinion?
Is any one of the following sufficient on its own, or would you define it as a combination? Sample figures given to argue over
- central pressure - below 960mb - or gradient pressure?
- area of pressure below 975mb covering at least 40000 km2
- wind gusts exceeding 80mph or 120km/h
- sustained winds of 40mph or 70 km/h for at least 2 hours
- rainfall of at least 30mm over at least 4 MetO regions
- speed of movement over the ground
or would you go for an index based on damage (likely to be) caused, in which case a storm when all trees in full leaf would rate more highly than one in late winter.
Originally Posted by: DEW