On 06/03/2013 17:15, Richard Dixon wrote:
On Tuesday, 5 March 2013 21:15:31 UTC, wrote:

http://www.metoffice.gov.uk/services/accuracy

Interesting how the Euro4 model doesn't really extend that far upstream of the British Isles. Clearly they must believe that the 25km/70 levels is adequate to capture any naughty 1987 storm type developments before they reach the British Isles before the storms shift into the 4km domain.

Richard

.... The truncation was probably forced by resource limitations but it
occurs to me that it might help with the 'over-cooking' of the
latent-heat exchanges that the finer-meshed models have problems with:
if the "model low" spends less time over the ocean, it has less (model)
time to pick up and convert humidity to sensible heat and over-drive the
pressure falls in a depression?

Martin.


--
West Moors / East Dorset
Lat: 50deg 49.25'N, Long: 01deg 53.05'W
Height (amsl): 17 m (56 feet)
COL category: C1 overall