347
WTNT35 KNHC 230844
TCPAT5
BULLETIN
HURRICANE TAMMY ADVISORY NUMBER 20
NWS NATIONAL HURRICANE CENTER MIAMI FL AL202023
500 AM AST MON OCT 23 2023
..TAMMY TURNING NORTHWARD
..HEAVY RAINS STILL OCCURING OVER PARTS OF THE LEEWARD ISLANDS
SUMMARY OF 500 AM AST...0900 UTC...INFORMATION
----------------------------------------------
LOCATION...21.4N 64.0W
ABOUT 230 MI...370 KM NNW OF ANGUILLA
MAXIMUM SUSTAINED WINDS...80 MPH...130 KM/H
PRESENT MOVEMENT...N OR 355 DEGREES AT 10 MPH...17 KM/H
MINIMUM CENTRAL PRESSURE...993 MB...29.33 INCHES
WATCHES AND WARNINGS
--------------------
THERE ARE NO COASTAL WATCHES OR WARNINGS IN EFFECT.
DISCUSSION AND OUTLOOK
----------------------
AT 500 AM AST (0900 UTC), THE CENTER OF HURRICANE TAMMY WAS LOCATED
NEAR LATITUDE 21.4 NORTH, LONGITUDE 64.0 WEST. TAMMY IS NOW MOVING
TOWARD THE NORTH NEAR 10 MPH (17 KM/H). A TURN TOWARD THE
NORTH-NORTHEAST OR NORTHEAST IS EXPECTED TO BEGIN LATER TODAY
AND CONTINUE INTO TUESDAY.
MAXIMUM SUSTAINED WINDS ARE NEAR 80 MPH (130 KM/H) WITH HIGHER
GUSTS. SOME SLIGHT STRENGTHENING IS POSSIBLE DURING THE NEXT COUPLE
OF DAYS FOLLOWED BY WEAKENING.
HURRICANE-FORCE WINDS EXTEND OUTWARD UP TO 25 MILES (35 KM) FROM THE
CENTER AND TROPICAL-STORM-FORCE WINDS EXTEND OUTWARD UP TO 125 MILES
(205 KM).
THE ESTIMATED MINIMUM CENTRAL PRESSURE IS 993 MB (29.33 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
RAINFALL: TAMMY IS EXPECTED TO PRODUCE AN ADDITIONAL 1 TO 3 INCHES
OF RAINFALL ACROSS PORTIONS OF THE BRITISH VIRGIN ISLANDS, THE
LEEWARD ISLANDS, AND THE NORTHERN WINDWARD ISLANDS THROUGH THIS
MORNING, BRINGING STORM TOTAL MAXIMUM AMOUNTS TO 12 INCHES IN THE
LEEWARD ISLANDS. THESE RAINS MAY PRODUCE ISOLATED FLASH AND URBAN
FLOODING, ALONG WITH ISOLATED MUDSLIDES IN AREAS OF HIGHER TERRAIN.
SURF: SWELLS GENERATED BY TAMMY WILL CONTINUE TO AFFECT PORTIONS OF
THE LEEWARD ISLANDS, THE BRITISH AND U.S. VIRGIN ISLANDS, AND PUERTO
RICO DURING THE NEXT FEW DAYS. THESE SWELLS ARE LIKELY TO CAUSE
LIFE-THREATENING SURF AND RIP CURRENT CONDITIONS. PLEASE CONSULT
PRODUCTS FROM YOUR LOCAL WEATHER OFFICE.
NEXT ADVISORY
-------------
NEXT COMPLETE ADVISORY AT 1100 AM AST.
FORECASTER PAPIN
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