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Old December 29th 05, 10:49 AM posted to uk.sci.weather
Will Hand Will Hand is offline
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Default Precipitation slowing down and thoughts ?


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Forecast advance of precip. seems to have slowed and 06Z GFS is marginally
colder than 00Z run at same times. I wonder if pressure falls are running down
the front taking out some of the gradient? It would make sense in the right
entrance and down the warm side of the thermal jet. Pressure is still falling
slowly here in Haytor, but the sky is brightening and radar shows little advance
east of precip. Also noticed that MetO web forecast now has sleet for SW rather
than the rain symbol shown earlier.
Mind you temperature is creeping up with an east wind, now -0.3 deg C at 1045
GMT. Haytor is quite representative of the true air mass at 1000 feet asl. Lower
down it may be colder due to cold air being trapped, like in the Exe Valley for
example. I wonder if freezing rain is on the cards now?
I'd love to see a tephigram of my area :-) Anyway no doubt the precip. will
eventually arrive and it still looks like the heavier stuff may be in the warmer
air.

PS usual weekly forecast from Haytor will be issued tomorrow morning, hopefully
by then we will have a better idea of the next easterly.

Will.
--

" Ah yet another day to enjoy "
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A COL BH site in East Dartmoor at Haytor, Devon 310m asl (1017 feet).

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