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Tropical Weather Outlook
NWS National Hurricane Center Miami FL
800 AM EDT Thu Sep 23 2021

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

The National Hurricane Center is issuing advisories on Tropical 
Depression Eighteen, located about 1800 miles east-southeast of the 
northern Leeward Islands.

The National Hurricane Center has issued the last advisory on 
Post-Tropical Cyclone Rose, located more than 1300 miles 
west-northwest of the Cabo Verde 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.  While showers and thunderstorms remain 
limited near the low, only a small increase in this activity could 
result in the formation of a subtropical or tropical cyclone while 
it moves generally southward over marginally warmer waters during 
the next day or two.  Strong upper-level winds are expected to 
develop over the system by this weekend, 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...60 percent.
* Formation chance through 5 days...medium...60 percent.

2. Another tropical wave is expected to move off the west coast of 
Africa by the end of the weekend. Thereafter, environmental 
conditions are forecast to be conducive for gradual development of 
this system as it moves westward at 10 to 15 mph over the far east 
Atlantic.
* Formation chance through 48 hours...low...near 0 percent.
* Formation chance through 5 days...low...20 percent.

Public Advisories on Tropical Depression Eighteen are issued under 
WMO header WTNT33 KNHC and under AWIPS header MIATCPAT3.
Forecast/Advisories on Tropical Depression Eighteen are issued 
under WMO header WTNT23 KNHC and under AWIPS header MIATCMAT3.

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