..TAMMY NOW A HURRICANE.. ..OCT. 20, 2023 11:00 AM EDT..

 

...TAMMY EXPECTED TO BRING HURRICANE CONDITIONS TO PORTIONS OF THE LEEWARD ISLANDS LATE TONIGHT AND SATURDAY... ...HEAVY RAINFALL AND FLOODING LIKELY OVER MUCH OF THE LESSER ANTILLES...

11:00 AM AST Fri Oct 20 Location: 14.1°N 58.6°W Moving: WNW at 7 mph Min pressure: 992 mb Max sustained: 75 mph

TAMMY MOVING THROUGH A MARGINALLY FAVORABLE UPPER LEVEL ENVIRONMENT, WHICH HAS HELPED TAMMY STRENGTHEN SOME.

ZCZC MIATWOAT ALL
TTAA00 KNHC DDHHMM

Tropical Weather Outlook
NWS National Hurricane Center Miami FL
800 AM EDT Fri Oct 20 2023

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

Active Systems:
The National Hurricane Center is issuing advisories on Tropical 
Storm Tammy, located a couple of hundred miles east-southeast of 
the Leeward Islands. 

1. Southwestern Caribbean Sea:
An area of low pressure could form this weekend over the 
southwestern Caribbean Sea.  Some slow development of this system 
will be possible before it moves inland over Central America by the 
early to middle portion of next week. 
* Formation chance through 48 hours...low...near 0 percent.
* Formation chance through 7 days...low...20 percent.

Forecaster Brown

..TROPICAL STORM TAMMY UPDATE OCT. 19, 2023 11:00 AM EDT.. ..ADDED LATEST WATCH AND WARNING 12:45 PM EDT..

 

...NEW WATCHES AND WARNINGS ISSUED FOR PORTIONS OF THE LEEWARD ISLANDS... ...TROPICAL STORM CONDITIONS AND HEAVY RAIN ARE POSSIBLE BEGINNING FRIDAY...

11:00 AM AST Thu Oct 19 Location: 13.6°N 55.7°W Moving: WNW at 15 mph Min pressure: 1003 mb Max sustained: 60 mph

LATEST WATCH AND WARNINGS!

Tammy is moving into a favorable upper-level environment. 

Further strengthening is possible.  RTW

..TROPICAL STORM TAMMY FORMS EAST OF THE WINDWARD ISLANDS.. ..OCT. 18, 2023 0500 PM EDT..

 

...TROPICAL STORM TAMMY FORMS EAST OF THE WINDWARD ISLANDS... ...TROPICAL STORM WATCHES ISSUED FOR PORTIONS OF THE LESSER ANTILLES...

5:00 PM AST Wed Oct 18 Location: 13.0°N 51.7°W Moving: W at 23 mph Min pressure: 1007 mb Max sustained: 40 mph

..TRACKING THE TROPICS UPDATE OCT 18, 2023..

 

ZCZC MIATWOAT ALL
TTAA00 KNHC DDHHMM

Tropical Weather Outlook
NWS National Hurricane Center Miami FL
800 AM EDT Wed Oct 18 2023

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

1. East of the Windward Islands (AL94):
Showers and thunderstorms associated with a broad area of low 
pressure located about 850 miles east of the Windward Islands 
continue to show signs of organization, however it is not yet clear 
if the system has a well-defined surface circulation.  Environmental 
conditions are expected to remain conducive for additional 
development, and a tropical depression is likely to form during the 
next day or so while the system moves westward to west-northwestward 
across the western tropical Atlantic toward the Lesser Antilles.  
Interests in the Lesser Antilles should monitor the progress of this 
system, and watches may be required for some of the islands later 
today.  Additional information, including storm warnings, can be 
found in High Seas Forecasts issued by the National Weather Service. 
Regardless of development, this system has the potential to bring 
gusty winds, heavy rainfall, and flooding to portions of the Lesser 
Antilles beginning Friday.
* 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 Berg