000
ABNT20 KNHC 260213
TWOAT 

Special Tropical Weather Outlook
NWS National Hurricane Center Miami FL
1015 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.

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.

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