NWS National Hurricane Center Miami FL
1100 AM EDT Thu Aug 26 2021
Tropical Depression Nine Advisory Number 1
For the North Atlantic…Caribbean Sea and the Gulf of Mexico:
1. Showers and thunderstorms continue to show signs of organization in
association with a broad area of low pressure located over the
west-central Caribbean Sea about 150 miles south-southwest of
Jamaica. Environmental conditions remain conducive for additional
development, and a tropical depression or tropical storm is
expected to form later today or tonight while the system moves
northwestward over the northwestern Caribbean Sea, reaching the
Cayman Islands tonight and western Cuba and the Yucatan Channel
Friday and Friday night. Given the recent developmental trends,
Tropical Storm Warnings for the Cayman Islands and western Cuba
could be required later this morning, and an Air Force Reserve
reconnaissance aircraft is scheduled to investigate the system
this afternoon. Regardless of development, locally heavy rainfall
and flooding are possible over portions of Jamaica and the Cayman
Islands today and tonight, and will likely spread across Cuba
and the Yucatan Peninsula on Friday.
The system is expected to enter into the Gulf of Mexico Friday night
and continue moving northwestward toward the central or northwestern
U.S. Gulf coast, potentially bringing dangerous impacts from storm
surge, wind, and heavy rainfall to portions of the coasts of Texas,
Louisiana, Mississippi, Alabama, and the Florida Panhandle by Sunday
and Monday. However, uncertainty in the system’s exact track and
intensity remains large since the low is just beginning to form.
Interests in these areas should closely monitor the progress of this
system and ensure they have their hurricane plans in place.
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…90 percent.
* Formation chance through 5 days…high…90 percent.
