000 WTNT21 KNHC 110855 TCMAT1 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