Storm Cooper
(User)
Sat Feb 26 2005 01:55 PM
Re: Developing Nor'Easter

A part of Tally AFD...

THE MAIN IMPACT THIS DECISION WILL HAVE ON OUR FORECAST WILL BE WIND
DIRECTION ON SUN AND, MORE IMPORTANTLY, SEVERE WX THREAT. THE NAM
LOOKS SCARY. HOWEVER, EVEN THE GFS SOLUTION WOULD POSE PROBLEMS.
THIS MODEL DOESN'T ALLOW THE VERY MOIST AND UNSTABLE TROPICAL
AIRMASS TO REACH THE COAST, LIKE THE NAM DOES. HOWEVER, WIND
PROFILES ARE STILL IMPRESSIVE. IN ADDITION, STRONG DPVA AND UPPER
LEVEL DIVERGENCE AT THE LEFT EXIT REGION OF A GULF JET STREAK WILL
ALSO BE POSITIVE CONTRIBUTERS TO A SEVERE WX THREAT. DAY 2
CONVECTIVE OUTLOOK JUST ARRIVED AND SUPPORTS THIS THINKING. THE
DEGREE OF SEVERE WILL BE DEPENDENT ON HOW FAR N THE SURFACE
INSTABILITY GETS. THE WARM FRONT COULD ENHANCE SHEAR AND THE THREAT
FOR TORNADOES. FOR NOW, WE WILL JUST MENTION ALL OF THESE
POSSIBILITIES IN THE HWO AND HOLD OFF ON ANY ENHANCED WORDING IN THE
ZONES.



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