000
ABNT20 KNHC 241754
TWOAT 

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

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

The National Hurricane Center is issuing advisories on Hurricane 
Sam, located about 1300 miles east-southeast of the northern Leeward 
Islands.

Surface observations and recent satellite wind data indicate that a 
surface low located a couple hundred miles north-northeast of 
Bermuda is gradually becoming better defined as it interacts with an 
upper-level trough. This system is producing winds of 40 to 45 mph 
north of the low center and additional development into a 
subtropical or tropical storm appears likely. Advisories could be 
initiated as soon as this afternoon as the system moves slowly 
toward the north-northwest over the next day or so. 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...70 percent.
* Formation chance through 5 days...high...70 percent.

A gale-force, non-tropical low pressure system, the remnants of 
Odette, is located less than 600 miles west of the 
westernmost Azores.  Showers and thunderstorms have mostly 
dissipated near the low, and strong upper-level winds are now 
expected to prevent further development as this system moves 
gradually southward until dissipation.  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...low...near 0 percent.
* Formation chance through 5 days...low...near 0 percent.

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...50 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