Note the dark slot on latest WV imagery driving
east across area FitzRoy and the rapidly cooling & expanding tops west
Biscay.
A GFS forecast run of 310K EPV I saw a couple of days ago-
http://bricker.met.psu.edu/trop-cgi/...hour=Animation
seems to have depicted this anomaly well.
A second one comes out of the Canadian maritimes to form the weekends 'new' low

NOAA shows a hook on the cloud head
http://www.sat.dundee.ac.uk/abin/pic...2/1101/ch2.jpg
this Quiksat pass,at nrly the same time shows the winds
http://manati.wwb.noaa.gov/dataimage...ms/WMBas30.png


--
regards,
david
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