berrywr
(Weather Analyst)
Fri Aug 06 2010 08:23 PM
Re: 92L Still Persisting

Okay, let's address a couple of features going on with 92L this evening. 92L looks pretty good on satellite imagery and looked even better not too long ago; a comment I posted about the NHC not even make a mere mention of it until 5 pm today.

92L is approaching land and there is very little opportunity for 92L to be upgraded and not likely until it re-emerges in the Bay of Campeche in a couple of days; maybe 3.

A couple of features; there is an upper low in the Bay of Campeche, an upper ridge over 92L and an area of 20 knot shear aloft ahead of the system but otherwise light shear dominates the area over and ahead into the Western GOM.

A couple of things worth mentioning....upper ridges over tropical systems are what you want for tropical systems to develop into storms; because there is an upper ridge over a shallow system the interaction between the two is not of that between an upper ridge and a hurricane.

The Upper Level Low to the NW of 92L will have no Fujiwara; 92L is simply too shallow to be steered by the Upper Level Low in this fashion. There is minimum gradience between this ULL and the ridge over 92L to have any degree of impact until 92L becomes much more organized. A Fujiwara is akin to two identical magnetic charges facing one another and repelling each other; that simply is not the case here/

This system will have to be monitored onces it emerges back in the BOC as some models have a break in the two ridges over the US and Atlantic Ocean and it will be interesting to see if it will interact with the evolving long wave trough pattern setting up over the Eastern US. There is a sagging front in the SE USA that will have to be monitored if it enters the GOM and goes stationary.

I commend the thinking and comments on this system...good work all!



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