415
WTNT35 KNHC 190853
TCPAT5
BULLETIN
TROPICAL STORM TAMMY ADVISORY NUMBER 3
NWS NATIONAL HURRICANE CENTER MIAMI FL AL202023
500 AM AST THU OCT 19 2023
...TAMMY EXPECTED TO GRADUALLY STRENGTHEN AS IT APPROACHES THE
LEEWARD ISLANDS...
...TROPICAL STORM CONDITIONS AND HEAVY RAIN ARE POSSIBLE BEGINNING
FRIDAY...
SUMMARY OF 500 AM AST...0900 UTC...INFORMATION
----------------------------------------------
LOCATION...13.5N 54.8W
ABOUT 480 MI...775 KM ESE OF GUADELOUPE
MAXIMUM SUSTAINED WINDS...40 MPH...65 KM/H
PRESENT MOVEMENT...W OR 280 DEGREES AT 17 MPH...28 KM/H
MINIMUM CENTRAL PRESSURE...1006 MB...29.71 INCHES
WATCHES AND WARNINGS
--------------------
CHANGES WITH THIS ADVISORY:
THE GOVERNMENT OF ANTIGUA HAS ISSUED A TROPICAL STORM WATCH FOR
ANTIGUA, BARBUDA, MONTSERRAT, AND NEVIS.
SUMMARY OF WATCHES AND WARNINGS IN EFFECT:
A TROPICAL STORM WATCH IS IN EFFECT FOR...
* BARBADOS
* DOMINICA
* MARTINIQUE AND GUADELOUPE
* ANTIGUA, BARBUDA, MONTSERRAT, AND NEVIS
A TROPICAL STORM WATCH MEANS THAT TROPICAL STORM CONDITIONS ARE
POSSIBLE WITHIN THE WATCH AREA, GENERALLY WITHIN 48 HOURS.
ADDITIONAL WATCHES AND WARNINGS WILL LIKELY BE REQUIRED LATER
TODAY.
FOR STORM INFORMATION SPECIFIC TO YOUR AREA, PLEASE MONITOR
PRODUCTS ISSUED BY YOUR NATIONAL METEOROLOGICAL SERVICE.
DISCUSSION AND OUTLOOK
----------------------
AT 500 AM AST (0900 UTC), THE CENTER OF TROPICAL STORM TAMMY WAS
LOCATED NEAR LATITUDE 13.5 NORTH, LONGITUDE 54.8 WEST. TAMMY IS
MOVING TOWARD THE WEST NEAR 17 MPH (28 KM/H). A TURN TOWARD THE
WEST-NORTHWEST IS FORECAST BY TONIGHT, FOLLOWED BY A TURN TOWARD THE
NORTHWEST FRIDAY NIGHT OR SATURDAY. ON THE FORECAST TRACK, THE
CENTER OF TAMMY WILL MOVE NEAR OR OVER THE LEEWARD ISLANDS FRIDAY
AND SATURDAY.
MAXIMUM SUSTAINED WINDS ARE NEAR 40 MPH (65 KM/H) WITH HIGHER GUSTS.
GRADUAL STRENGTHENING IS FORECAST DURING THE NEXT FEW DAYS AND TAMMY
COULD BE NEAR HURRICANE INTENSITY BY THE END OF THE WEEKEND.
TROPICAL-STORM-FORCE WINDS EXTEND OUTWARD UP TO 140 MILES (220 KM)
FROM THE CENTER.
THE ESTIMATED MINIMUM CENTRAL PRESSURE IS 1006 MB (29.71 INCHES).
HAZARDS AFFECTING LAND
----------------------
KEY MESSAGES FOR TAMMY CAN BE FOUND IN THE TROPICAL CYCLONE
DISCUSSION UNDER AWIPS HEADER MIATCDAT5 AND WMO HEADER WTNT45 KNHC
AND ON THE WEB AT HURRICANES.GOV/TEXT/MIATCDAT5.SHTML
WIND: TROPICAL STORM CONDITIONS ARE POSSIBLE WITHIN THE WATCH
AREA BEGINNING ON FRIDAY.
RAINFALL: THROUGH SATURDAY NIGHT, TAMMY IS EXPECTED TO PRODUCE
STORM TOTAL RAINFALL OF 3 TO 6 INCHES, WITH MAXIMUM AMOUNTS OF 10
INCHES, ACROSS PORTIONS OF THE NORTHERN WINDWARD INTO THE LEEWARD
ISLANDS. RAINFALL TOTALS OF 1 TO 2 INCHES WITH MAXIMUM AMOUNTS OF
4 INCHES ARE EXPECTED FOR THE BRITISH AND U.S. VIRGIN ISLANDS INTO
EASTERN PUERTO RICO. THESE RAINS MAY PRODUCE ISOLATED FLASH AND
URBAN FLOODING, ALONG WITH ISOLATED MUDSLIDES IN AREAS OF HIGHER
TERRAIN.
SURF: SWELLS GENERATED BY TAMMY WILL BEGIN AFFECTING PORTIONS OF
THE LESSER ANTILLES LATER TODAY. THESE SWELLS ARE LIKELY TO CAUSE
LIFE-THREATENING SURF AND RIP CURRENT CONDITIONS. PLEASE CONSULT
PRODUCTS FROM YOUR LOCAL WEATHER OFFICE.
NEXT ADVISORY
-------------
NEXT INTERMEDIATE ADVISORY AT 800 AM AST.
NEXT COMPLETE ADVISORY AT 1100 AM AST.
FORECASTER CANGIALOSI
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