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Old February 16th 21, 08:30 AM posted to uk.sci.weather
N_Cook N_Cook is offline
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Default ECMWF wind speed ?

On 31/01/2021 09:39, N_Cook wrote:
On 20/01/2021 14:48, N_Cook wrote:
I've decided the ECMWF 10m wind plots are a waste of space. GFS has
projected, rightly or wrongly, easy to determine sustained 70mph wind
over the Channel Approaches 29 Jan.
The corresponding ECMWF max winds has absurdely long arrows protruding
well into France, so presumably the blunt barbless end of the arrow is
the relevant datapoint ,but next to uselss, for severe gale purposes.


The fletchless, not barbless, ends of the so-called wind arrows are on a
regular grid, so presumably are the points of interest.
For the NW Europe 10m wind plots, very approximately, 55 pixels of
"wind arrow" represent 60 kph wind speed


A bit mpre sensibly , comparing cut-down MetO Euro4 and the NW Europe
ECMWF 10m wind plot for 2 lat&long samplings, of 73 and 83 kph
sustained, NW of Ireland last night, comes out to be 60kph equates to
about 29 pixels

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