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HURRICANE IRMA FORECAST/ADVISORY NUMBER  49
NWS NATIONAL HURRICANE CENTER MIAMI FL       AL112017
0900 UTC MON SEP 11 2017

CHANGES IN WATCHES AND WARNINGS WITH THIS ADVISORY...

THE HURRICANE WARNING IS CHANGED TO A TROPICAL STORM WARNING ALONG
THE FLORIDA WEST COAST SOUTH OF ANCLOTE RIVER TO BONITA BEACH...
ALONG THE FLORIDA EAST COAST SOUTH OF SEBASTIAN INLET TO JUPITER
INLET...AND FOR LAKE OKEECHOBEE.

THE TROPICAL STORM WARNINGS ARE DISCONTINUED FOR THE FLORIDA
KEYS...FLORIDA BAY...THE FLORIDA EAST COAST SOUTH OF JUPITER
INLET...THE FLORIDA WEST COAST SOUTH OF BONITA BEACH...AND FOR THE
NORTHWESTERN BAHAMAS.

THE STORM SURGE WARNING IS DISCONTINUED FOR THE FLORIDA KEYS AND
THE FLORIDA COAST FROM NORTH MIAMI BEACH SOUTHWARD AROUND THE
FLORIDA PENINSULA TO CAPE SABLE.

SUMMARY OF WATCHES AND WARNINGS IN EFFECT...

A STORM SURGE WARNING IS IN EFFECT FOR...
* SOUTH SANTEE RIVER SOUTHWARD TO JUPITER INLET
* CAPE SABLE NORTHWARD TO THE OCHLOCKONEE RIVER
* TAMPA BAY

A HURRICANE WARNING IS IN EFFECT FOR...
* SEBASTIAN INLET TO FERNANDINA BEACH
* ANCLOTE RIVER TO INDIAN PASS

A HURRICANE WATCH IS IN EFFECT FOR...
* NORTH OF FERNANDINA BEACH TO EDISTO BEACH

A TROPICAL STORM WARNING IS IN EFFECT FOR...
* WEST OF INDIAN PASS TO THE OKALOOSA/WALTON COUNTY LINE
* NORTH OF FERNANDINA BEACH TO SOUTH SANTEE RIVER
* SOUTH OF ANCLOTE RIVER TO BONITA BEACH
* SOUTH OF SEBASTIAN INLET TO JUPITER INLET
* LAKE OKEECHOBEE

A STORM SURGE WARNING MEANS THERE IS A DANGER OF LIFE-THREATENING
INUNDATION...FROM RISING WATER MOVING INLAND FROM THE COASTLINE...
DURING THE NEXT 36 HOURS IN THE INDICATED LOCATIONS. FOR A
DEPICTION OF AREAS AT RISK...PLEASE SEE THE NATIONAL WEATHER
SERVICE STORM SURGE WATCH/WARNING GRAPHIC...AVAILABLE AT
HURRICANES.GOV.  THIS IS A LIFE-THREATENING SITUATION.  PERSONS
LOCATED WITHIN THESE AREAS SHOULD TAKE ALL NECESSARY ACTIONS TO
PROTECT LIFE AND PROPERTY FROM RISING WATER AND THE POTENTIAL FOR
OTHER DANGEROUS CONDITIONS.  PROMPTLY FOLLOW EVACUATION AND OTHER
INSTRUCTIONS FROM LOCAL OFFICIALS.

INTERESTS ELSEWHERE IN THE SOUTHEASTERN UNITED STATES SHOULD MONITOR
THE PROGRESS OF IRMA.

HURRICANE CENTER LOCATED NEAR 28.9N  82.6W AT 11/0900Z
POSITION ACCURATE WITHIN  20 NM

PRESENT MOVEMENT TOWARD THE NORTH-NORTHWEST OR 340 DEGREES AT  16 KT

ESTIMATED MINIMUM CENTRAL PRESSURE  965 MB
MAX SUSTAINED WINDS  65 KT WITH GUSTS TO  80 KT.
64 KT.......  0NE   0SE  50SW  50NW.
50 KT.......140NE 140SE  90SW 120NW.
34 KT.......360NE 230SE 150SW 240NW.
12 FT SEAS..470NE 270SE 480SW 360NW.
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 28.9N  82.6W AT 11/0900Z...INLAND
AT 11/0600Z CENTER WAS LOCATED NEAR 28.2N  82.2W...INLAND

FORECAST VALID 11/1800Z 30.8N  83.7W...INLAND
MAX WIND  55 KT...GUSTS  65 KT.
50 KT... 60NE  60SE  60SW  30NW.
34 KT...220NE 150SE 100SW 100NW.

FORECAST VALID 12/0600Z 33.0N  85.7W...INLAND
MAX WIND  35 KT...GUSTS  45 KT.
34 KT... 90NE  60SE  30SW  60NW.

FORECAST VALID 12/1800Z 34.5N  87.8W...INLAND
MAX WIND  25 KT...GUSTS  35 KT.

FORECAST VALID 13/0600Z 35.5N  89.0W...POST-TROP/INLAND
MAX WIND  20 KT...GUSTS  30 KT.

FORECAST VALID 14/0600Z...DISSIPATED

REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 28.9N  82.6W

NEXT ADVISORY AT 11/1500Z

$$
FORECASTER BEVEN


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