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Tropical Weather Outlook
NWS National Hurricane Center Miami FL
200 AM EDT Fri Sep 24 2021

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

The National Hurricane Center is issuing advisories on Tropical 
Storm Sam, located about 1500 miles east-southeast of the northern 
Leeward Islands.

1. A gale-force, non-tropical low pressure system, the remnants of 
Odette, is located a little more than 600 miles west-northwest of 
the westernmost Azores.  Showers and thunderstorms remain limited 
near the low, and this system has only a brief window of opportunity 
to become a subtropical or tropical cyclone while it moves generally 
south-southeastward over marginally warmer waters.  Strong 
upper-level winds are expected to develop over the system by late 
today, which should then limit further development.  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...medium...40 percent.
* Formation chance through 5 days...medium...40 percent.

2. A large area of showers and thunderstorms centered a couple of 
hundred miles east of Bermuda is associated with a surface and 
upper-level trough.  Some tropical or subtropical development 
of this system could occur through early Saturday as it moves 
generally north-northwestward.  After that time, development 
is not expected due to strong upper-level winds. 
* Formation chance through 48 hours...low...20 percent.
* Formation chance through 5 days...low...20 percent.

3. A tropical wave is expected to move off the west coast of Africa by 
the end of this weekend.  Thereafter, environmental conditions are 
forecast to be conducive for gradual development, and a tropical 
depression could form by the middle of next week while the system 
moves westward at 10 to 15 mph over the far eastern tropical 
Atlantic.
* Formation chance through 48 hours...low...near 0 percent.
* Formation chance through 5 days...medium...40 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 Cangialosi