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QUOTE(Paul B @ 8 Feb 2007, 10:14 AM) <{POST_SNAPBACK}>
I would place FI as being at Saturday at the moment to be honest, so T+54/T+60 hours. Cold air is never going to be far away from the north and east, and today's system will pull some of that back south and west later on. I suspect this will be hanging around still on Saturday. Where's Saturday's low tracks is still open to a bit of debate, but the key word again seems to be "south".
Interstingly, the jet shows some northerly bulges that dissipate just before getting to the Uk. This is allowing the heights over the north Uk to push the LP lower, flattening it and making a beast more likely. The third bulg in the jet (T+56 - 60) doesn't get dissipated as quick, thus catalysing the rapid change in the position of the LP the E of the UK. I can't see why this would happen so quickly and therefore I agree.
Model watching (especially for those unfortunates who are 40 miles too far north) will be enthralling obver the next couple of runs.