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Tropical Storm Gustav Threatens Coast and New Storm Gets Named Hanna

As of this afternoon, around 2pm EST, Tropical Storm Gustav increased movement to the West slightly to 5mph maintaining wind speed of 70 mph and is located around 17.9 N, 76.2 W. Gustav is expected to soon reach hurricane strength again once it begins movement over the warmer gulf waters. ...

As of this afternoon, around 2pm EST, Tropical Storm Gustav increased movement to the West slightly to 5mph maintaining wind speed of 70 mph and is located around 17.9 N, 76.2 W. Gustav is expected to soon reach hurricane strength again once it begins movement over the warmer gulf waters. As it has moved off the land masses the wind sheer has decreased allowing for a stronger convection which will enable Gustav to increase in strength. The models show a weak mid-level ridge and upper-level ridge of high pressure over Florida and the Eastern Gulf which will help drive Gustav to the West and then Northwest/North in the Gulf over the weekend making landfall around Louisiana. Tropical Storm Hanna was named this afternoon with a wind speed of 40 mph, located around 20.5N, 59.2W. Hanna is moving to the West/Northwest at a much greater speed than Gustav at 12 mph. The storm is expected to move to the North of the Greater Antilles and remain over the warm water where there is an upper-level low pressure system moving West that could provide a low shear for Hanna. Depending on the movement of the pressure system and Hanna\'s movement it could provide for an ideal environment for intensification, allowing Hanna to reach Hurricane strength around Sunday. This could potentially be another major rainfall for the Atlantic coastal states so this will be a system to keep an eye on. There is another well developed tropical wave coming off the coast of Africa that is moving at approximately 15mph. This wave has potential for becoming a more structured storm as it continues East in the next few days. The images below are generated using the GES DISC TOVAS visualization tool for TRMM 3B42RT data (http://disc2.nascom.nasa.gov/Giovanni/tovas/realtime.3B42RT.shtml), from the GES DISC GIVER tool which is in development to generate dynamic visualizations of TRMM Merged IR data, and from WMS at JPL.

disc2.nascom.nasa.gov/Giovanni/tovas/realtime.3B42RT.shtml

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Last updated: Sep 09, 2009 02:29 PM ET
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