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Tropical Weather Outlook
NWS National Hurricane Center Miami FL
800 PM EDT Thu Sep 26 2024

For the North Atlantic...Caribbean Sea and the Gulf of Mexico:

Active Systems:
The National Hurricane Center is issuing advisories on Hurricane 
Helene, located over the northeastern Gulf of Mexico and on 
Tropical Storm Isaac, located over the central Subtropical Atlantic 
Ocean.

1. Eastern and Central Tropical Atlantic (AL98):
Showers and thunderstorms associated with an area of low pressure 
located about one thousand miles west of the Cabo Verde Islands 
continue to show signs of organization. Recent satellite imagery 
suggests the system does not yet have a well-defined surface 
circulation. However, environmental conditions are expected to be 
conducive for further development. A tropical depression is 
expected to form tonight or on Friday while the disturbance moves 
generally westward to west-northwestward at 10 to 15 mph. The 
system is then forecast to slow down and turn north-northwestward 
late Friday and Saturday.
* Formation chance through 48 hours...high...90 percent. 
* Formation chance through 7 days...high...90 percent.

2. Western Caribbean:
An area of low pressure could form over the western Caribbean Sea 
by the middle of next week. Environmental conditions are expected to 
be conducive for slow development thereafter, while the system 
moves generally northwestward.
* Formation chance through 48 hours...low...near 0 percent. 
* Formation chance through 7 days...low...20 percent.


Public Advisories on Tropical Storm Isaac are issued under WMO 
header WTNT35 KNHC and under AWIPS header MIATCPAT5. 
Forecast/Advisories on Tropical Storm Isaac are issued under WMO 
header WTNT25 KNHC and under AWIPS header MIATCMAT5.

Forecaster Hagen