Ricreig
(User)
Tue Aug 31 2004 07:34 PM
Re: getting stronger ya'll

HF, I'm sure you've seen the current NHC discussion (excerpt):
THE INITIAL MOTION IS NOW 280/13. FRANCES REMAINS ON THE SOUTH SIDE
OF A STRONG RIDGE OVER THE WESTERN ATLANTIC. LARGE-SCALE MODELS
ALL FORECAST THE RIDGE TO WEAKEN DURING THE FORECAST PERIOD...BUT
THERE ARE SIGNIFICANT DIFFERENCES IN THE DETAILS WHICH HAVE MAJOR
IMPLICATIONS FOR WHERE FRANCES WILL END UP. DATA FROM THE RECENT
SYNOPTIC SURVEILLANCE MISSION HAD SOME INTERESTING EFFECTS ON THE
DYNAMICAL MODELS. THE GFS...WHICH HAS BEEN A LEFT OUTLIER MOST OF
THE TIME...HAS SHIFTED WELL TO THE RIGHT AND IS NOW A RIGHT
OUTLIER...MOVING FRANCES NORTHWARD ALONG 77-78W AFTER 72 HR. THE
NOGAPS...WHICH HAS BEEN A RIGHT OUTLIER...IS NOW A LEFT OUTLIER
CALLING FOR LANDFALL IN SOUTHEASTERN FLORIDA. THE GFDL AND UKMET
HAVE BOTH SHIFTED THEIR TRACKS TO THE RIGHT AFTER 72 HR. GIVEN THE
LARGE CHANGES IN JUST ONE CYCLE...THE OFFICIAL FORECAST WILL NOT
CHANGE MUCH AT ALL...BASICALLY BEING AN UPDATE OF THE PREVIOUS
PACKAGE. IT IS DOWN THE CENTER OF THE MODEL GUIDANCE UP TO 72 HR
AND ALONG THE LEFT SIDE THEREAFTER.

The qyestion is; Why do you suppose the NHC is favoring the left side after 72hrs? Is there some admission that it is moving West rapidly and not likely to be able to turn fast enough to follow the GFS or even the UKMET which has been doing a good job so far?



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