ZCZC MIATCMAT4 ALL
TTAA00 KNHC DDHHMM

TROPICAL STORM ISAAC FORECAST/ADVISORY NUMBER  19
NWS NATIONAL HURRICANE CENTER MIAMI FL       AL092018
0900 UTC WED SEP 12 2018

CHANGES IN WATCHES AND WARNINGS WITH THIS ADVISORY...

NONE.

SUMMARY OF WATCHES AND WARNINGS IN EFFECT...

A TROPICAL STORM WARNING IS IN EFFECT FOR...
* MARTINIQUE
* DOMINICA
* GUADELOUPE

A TROPICAL STORM WATCH IS IN EFFECT FOR...
* ANTIGUA
* MONTSERRAT
* ST. KITTS AND NEVIS
* SABA AND ST. EUSTATIUS

A TROPICAL STORM WARNING MEANS THAT TROPICAL STORM CONDITIONS ARE
EXPECTED SOMEWHERE WITHIN THE WARNING AREA WITHIN 36 HOURS.

A TROPICAL STORM WATCH MEANS THAT TROPICAL STORM CONDITIONS ARE
POSSIBLE WITHIN THE WATCH AREA... IN THIS CASE WITHIN 36 TO 48
HOURS.

INTERESTS ELSEWHERE IN THE LEEWARD ISLANDS SHOULD MONITOR THE
PROGRESS OF ISAAC.

TROPICAL STORM CENTER LOCATED NEAR 14.5N  53.5W AT 12/0900Z
POSITION ACCURATE WITHIN  15 NM

PRESENT MOVEMENT TOWARD THE WEST OR 270 DEGREES AT  13 KT

ESTIMATED MINIMUM CENTRAL PRESSURE 1000 MB
MAX SUSTAINED WINDS  50 KT WITH GUSTS TO  60 KT.
50 KT....... 20NE   0SE   0SW  20NW.
34 KT....... 90NE  20SE  20SW  90NW.
12 FT SEAS..180NE  90SE  90SW 180NW.
WINDS AND SEAS VARY GREATLY IN EACH QUADRANT.  RADII IN NAUTICAL
MILES ARE THE LARGEST RADII EXPECTED ANYWHERE IN THAT QUADRANT.

REPEAT...CENTER LOCATED NEAR 14.5N  53.5W AT 12/0900Z
AT 12/0600Z CENTER WAS LOCATED NEAR 14.5N  53.0W

FORECAST VALID 12/1800Z 14.8N  55.7W
MAX WIND  50 KT...GUSTS  60 KT.
50 KT... 20NE   0SE   0SW   0NW.
34 KT... 90NE  30SE   0SW  80NW.

FORECAST VALID 13/0600Z 15.0N  58.6W
MAX WIND  45 KT...GUSTS  55 KT.
34 KT... 80NE  30SE   0SW  60NW.

FORECAST VALID 13/1800Z 15.2N  61.5W
MAX WIND  45 KT...GUSTS  55 KT.
34 KT... 80NE  30SE   0SW  50NW.

FORECAST VALID 14/0600Z 15.4N  64.8W
MAX WIND  40 KT...GUSTS  50 KT.
34 KT... 70NE  30SE   0SW  50NW.

FORECAST VALID 15/0600Z 15.3N  70.6W
MAX WIND  40 KT...GUSTS  50 KT.
34 KT... 70NE   0SE   0SW  50NW.

EXTENDED OUTLOOK. NOTE...ERRORS FOR TRACK HAVE AVERAGED NEAR 150 NM
ON DAY 4 AND 175 NM ON DAY 5...AND FOR INTENSITY NEAR 15 KT EACH DAY

OUTLOOK VALID 16/0600Z 15.2N  75.0W
MAX WIND  35 KT...GUSTS  45 KT.

OUTLOOK VALID 17/0600Z...DISSIPATED

REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 14.5N  53.5W

NEXT ADVISORY AT 12/1500Z

$$
FORECASTER CANGIALOSI


NNNN