The satellite appearance of Isaac tonight is one of a rather large storm, and slightly better organized than last evening. It appears as if there is less dry air being entrained into the system, and the overall outflow pattern is improving. There has also been a recent explosion of convection which is now wrapping back around and over the center of the storm. All this should equate to an intensifying system… especially considering that it should remain in an area with fairly weak shear and high sea surface temperatures.
The last Hurricane Hunter mission is now about three hours old. It, combined with radar suggested that the storm still only had winds of about 45 mph. The mission did observe a steadily lowering pressure. Given the satellite appearance, it would not surprise me if winds have increased some during the past couple of hours. Isaac is located about 70 miles southwest of Guadeloupe and moving to the west at around 20 mph. Hurricane Warnings are now in effect for the south coast of the Dominican Republic from Isla Saona westward to the Haiti-Dominican Republic southern border. Hurricane Watches are in effect for Puerto Rico… Haiti… Vieques… Culebra… and the U.S. & British Virgin Islands.
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The bottom line is that we don’t know a whole lot more than we did 24 hours ago. People in Florida should continue to monitor the progress of Isaac on a daily basis for the next 48 hours and be mindful of what actions they should take at that time if Isaac becomes a threat.
Titusville – Level 5 – Stay alert.