Clark
(Meteorologist)
Sun Aug 07 2005 10:56 PM
Re: Tropical Storm Irene Forms from TD#9, No Threat to Land

What you see to the SE of Irene is the old mid-level circulation. There is no surface reflection and, while a mid-level center can sometimes spin-up a new low-level feature, no indications of this occuring. The low-level center continues to be the feature identified by the NHC in the 5p advisory and is now seeing some convection fire near & over the center at this time. However, if the center were to reform further to the SE, it'd be a whole new ballgame with regards to this one, so we'll watch it...just be advised that it isn't likely at this time.

Wind shear is lessening over the storm, per UWisconsin satellite estimates, though overall is still marginal for development. The system should continue WNW for the next day or two before slowing and likely turning northward with time, with some slow strengthening possible.

Harvey is about to meet with its maker and start undergoing extratropical transition. It is the upper-low/shortwave trough just to the southwest of the storm that will provide the impetus for ET to occur, which it should complete in fairly short order. It'll be out of our hair in about a day, then head off towards Europe.

Conditions across the rest of the basin are gradually becoming more favorable for development. Weak ridging is present across much of the tropical Atlantic, with the trough along the west coast of Africa beginning to lift out. Irene's tango with the upper-low has kept the upper-low somewhat at bay; there are indications of the upper-level feature weakening as well. The TUTT cell pinwheeling through the Bahamas is beginning to lift NW, though the overall troughiness remains across the western Atlantic W of 65 W and into the Gulf of Mexico...don't see that part changing for awhile given the current synoptic regime. Things'll probably get kicking again in the next week or so...for now, time to enjoy a little respite.



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