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Tropical Weather Outlook
NWS National Hurricane Center Miami FL
800 PM EDT Wed Sep 25 2024

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

Special outlook issued to update information about AL99, the 
system located over the Central Subtropical Atlantic. 

Active Systems:
The National Hurricane Center is issuing advisories on Hurricane 
Helene, located over the southeastern Gulf of Mexico.

1. Eastern and Central Tropical Atlantic (AL98):
Showers and thunderstorms have become slightly better organized over 
the past 24 hours in association with a broad low pressure system 
along a tropical wave located several hundred miles west of the Cabo 
Verde Islands.  Environmental conditions appear favorable for 
gradual development of this system, and a tropical depression is 
likely to form during the next couple of days while it moves 
westward to west-northwestward across the eastern and central 
tropical Atlantic.
* Formation chance through 48 hours...high...70 percent. 
* Formation chance through 7 days...high...80 percent.

2. Central Subtropical Atlantic (AL99): 
Updated: Showers and thunderstorms continue to become better 
organized with a gale-force area of low pressure located several 
hundred miles to the east-northeast of Bermuda. Recently-received 
satellite wind data has revealed that the low is no longer attached 
to a frontal boundary and is producing a concentrated area of 
tropical-storm-force winds near the center. If these trends 
continue, this system is likely to become a tropical storm shortly. 
The system should continue moving generally east-northeastward, 
remaining over the central and eastern subtropical Atlantic. 
Additional information on this system, including gale warnings, can 
be found in High Seas Forecasts issued by the National Weather 
Service.
* Formation chance through 48 hours...high...80 percent. 
* Formation chance through 7 days...high...80 percent.


High Seas Forecasts issued by the National Weather Service
can be found under AWIPS header NFDHSFAT1, WMO header FZNT01 
KWBC, and online at ocean.weather.gov/shtml/NFDHSFAT1.php

Forecaster Papin/Beven