Jeff co-founded the Weather Underground in 1995 while working on his Ph.D. He flew with the NOAA Hurricane Hunters from 1986-1990.
By: Dr. Jeff Masters , 3:12 AM GMT on September 08, 2007
Subtropical Storm Gabrielle formed tonight, after a day-long struggle trying to figure out which of two centers to consolidate around. Gabrielle finally decided it would use both centers, and a very large and elongated circulation is the result. This makes Gabrielle a subtropical storm, since the heavy thunderstorm activity is well removed from the center of circulation. Had the storm been able to consolidate around a single center, it would have become a tropical storm, not a subtropical storm.
Wind shear is 10-20 knots over the storm. This shear, combined with the rather large and poorly-organized circulation, will not allow much intensification, and Gabrielle will have a tough time becoming stronger than a 55-mph storm at landfall.
Figure 1. Latest IR satellite image of Gabrielle.
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