407
WTNT35 KNHC 250840
TCPAT5
BULLETIN
HURRICANE TAMMY ADVISORY NUMBER 28
NWS NATIONAL HURRICANE CENTER MIAMI FL AL202023
500 AM AST WED OCT 25 2023
..TAMMY STRENGTHENS OVER THE OPEN ATLANTIC
..FORECAST TO BECOME A POWERFUL EXTRATROPICAL CYCLONE
SUMMARY OF 500 AM AST...0900 UTC...INFORMATION
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LOCATION...25.6N 60.2W
ABOUT 540 MI...870 KM SSE OF BERMUDA
MAXIMUM SUSTAINED WINDS...100 MPH...155 KM/H
PRESENT MOVEMENT...NE OR 45 DEGREES AT 10 MPH...17 KM/H
MINIMUM CENTRAL PRESSURE...969 MB...28.62 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 25.6 NORTH, LONGITUDE 60.2 WEST. TAMMY IS MOVING
TOWARD THE NORTHEAST NEAR 10 MPH (17 KM/H). A NORTHWARD TURN IS
EXPECTED LATER TODAY, FOLLOWED BY A SLOWER NORTHWESTWARD MOTION ON
THURSDAY AND FRIDAY.
MAXIMUM SUSTAINED WINDS HAVE INCREASED TO NEAR 100 MPH (155 KM/H)
WITH HIGHER GUSTS. SOME ADDITIONAL STRENGTHENING IS POSSIBLE TODAY,
FOLLOWED BY WEAKENING THROUGH LATE THIS WEEK. TAMMY IS FORECAST TO
BECOME A POWERFUL POST-TROPICAL CYCLONE BY THURSDAY.
HURRICANE-FORCE WINDS EXTEND OUTWARD UP TO 25 MILES (35 KM) FROM THE
CENTER AND TROPICAL-STORM-FORCE WINDS EXTEND OUTWARD UP TO 175 MILES
(280 KM).
THE ESTIMATED MINIMUM CENTRAL PRESSURE IS 969 MB (28.62 INCHES).
HAZARDS AFFECTING LAND
----------------------
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 COUPLE OF DAYS. THESE SWELLS ARE LIKELY TO
CAUSE LIFE-THREATENING SURF AND RIP CURRENT CONDITIONS. PLEASE
CONSULT PRODUCTS FROM YOUR LOCAL WEATHER OFFICE.
NEXT ADVISORY
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NEXT COMPLETE ADVISORY AT 1100 AM AST.
FORECASTER KELLY
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