000 WTNT21 KNHC 111450 TCMAT1 TROPICAL STORM IRMA FORECAST/ADVISORY NUMBER 50 NWS NATIONAL HURRICANE CENTER MIAMI FL AL112017 1500 UTC MON SEP 11 2017 CHANGES IN WATCHES AND WARNINGS WITH THIS ADVISORY... THE STORM SURGE WARNING HAS BEEN DISCONTINUED FROM BONITA BEACH SOUTHWARD. THE TROPICAL STORM WARNING HAS BEEN DISCONTINUED FOR LAKE OKEECHOBEE. THE TROPICAL STORM WARNING HAS BEEN DISCONTINUED FROM THE VOLUSIA/BREVARD COUNTY LINE SOUTHWARD. THE TROPICAL STORM WARNING HAS BEEN DISCONTINUED SOUTH OF ANCLOTE RIVER. SUMMARY OF WATCHES AND WARNINGS IN EFFECT... A STORM SURGE WARNING IS IN EFFECT FOR... * SOUTH SANTEE RIVER SOUTHWARD TO THE FLAGLER/VOLUSIA COUNTY LINE * NORTH OF BONITA BEACH TO THE OCHLOCKONEE RIVER * TAMPA BAY A TROPICAL STORM WARNING IS IN EFFECT FOR... * ANCLOTE RIVER TO THE OKALOOSA/WALTON COUNTY LINE * NORTH OF THE VOLUSIA/BREVARD COUNTY LINE TO THE SOUTH SANTEE RIVER 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. TROPICAL STORM CENTER LOCATED NEAR 30.3N 83.1W AT 11/1500Z POSITION ACCURATE WITHIN 20 NM PRESENT MOVEMENT TOWARD THE NORTH-NORTHWEST OR 340 DEGREES AT 15 KT ESTIMATED MINIMUM CENTRAL PRESSURE 975 MB MAX SUSTAINED WINDS 55 KT WITH GUSTS TO 65 KT. 50 KT.......140NE 140SE 90SW 120NW. 34 KT.......360NE 230SE 150SW 200NW. 12 FT SEAS..500NE 360SE 450SW 0NW. 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 30.3N 83.1W AT 11/1500Z AT 11/1200Z CENTER WAS LOCATED NEAR 29.6N 82.7W FORECAST VALID 12/0000Z 32.0N 84.5W...INLAND MAX WIND 50 KT...GUSTS 60 KT. 50 KT... 60NE 50SE 50SW 50NW. 34 KT...220NE 120SE 100SW 100NW. FORECAST VALID 12/1200Z 33.9N 86.6W...INLAND MAX WIND 30 KT...GUSTS 40 KT. FORECAST VALID 13/0000Z 35.0N 88.4W...POST-TROP/INLAND MAX WIND 25 KT...GUSTS 35 KT. FORECAST VALID 13/1200Z 36.0N 89.0W...POST-TROP/INLAND MAX WIND 20 KT...GUSTS 30 KT. FORECAST VALID 14/1200Z...DISSIPATED REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 30.3N 83.1W NEXT ADVISORY AT 11/2100Z $$ FORECASTER PASCH