000 WTNT33 KNHC 230850 TCPAT3 BULLETIN TROPICAL STORM BONNIE ADVISORY NUMBER 4 NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL AL032010 500 AM EDT FRI JUL 23 2010 ...BONNIE MOVING FASTER TOWARD SOUTHERN FLORIDA... SUMMARY OF 500 AM EDT...0900 UTC...INFORMATION ---------------------------------------------- LOCATION...24.1N 78.6W ABOUT 155 MI...250 KM SE OF MIAMI FLORIDA ABOUT 165 MI...260 KM ESE OF MARATHON FLORIDA MAXIMUM SUSTAINED WINDS...40 MPH...65 KM/HR PRESENT MOVEMENT...WNW OR 295 DEGREES AT 18 MPH...30 KM/HR MINIMUM CENTRAL PRESSURE...1008 MB...29.77 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY... A TROPICAL STORM WATCH HAS BEEN ISSUED FOR THE NORTHERN GULF OF MEXICO COAST FROM DESTIN FLORIDA WESTWARD TO MORGAN CITY LOUISIANA. THE TROPICAL STORM WARNING FOR THE CENTRAL BAHAMAS HAS BEEN DISCONTINUED. SUMMARY OF WATCHES AND WARNINGS IN EFFECT... A TROPICAL STORM WARNING IS IN EFFECT FOR... * THE NORTHWESTERN BAHAMAS * THE FLORIDA EAST COAST FROM DEERFIELD BEACH SOUTHWARD INCLUDING THE ENTIRE FLORIDA KEYS AND FLORIDA BAY...AND ALONG THE WEST COAST OF FLORIDA NORTHWARD TO ENGLEWOOD A TROPICAL STORM WATCH IS IN EFFECT FOR... * THE EAST COAST OF FLORIDA NORTH OF DEERFIELD BEACH TO JUPITER INLET INCLUDING LAKE OKEECHOBEE * THE NORTHERN GULF COAST FROM DESTIN FLORIDA TO MORGAN CITY LOUISIANA 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 WITHIN 48 HOURS. INTERESTS ELSEWHERE ALONG THE NORTHERN GULF COAST SHOULD MONITOR THE PROGRESS OF BONNIE. FOR STORM INFORMATION SPECIFIC TO YOUR AREA IN THE UNITED STATES...INCLUDING POSSIBLE INLAND WATCHES AND WARNINGS...PLEASE MONITOR PRODUCTS ISSUED BY YOUR LOCAL NATIONAL WEATHER SERVICE FORECAST OFFICE. FOR STORM INFORMATION SPECIFIC TO YOUR AREA OUTSIDE UNITED STATES...PLEASE MONITOR PRODUCTS ISSUED BY YOUR NATIONAL METEOROLOGICAL SERVICE. DISCUSSION AND 48-HOUR OUTLOOK ------------------------------ AT 500 AM EDT...0900 UTC...THE CENTER OF TROPICAL STORM BONNIE WAS LOCATED NEAR LATITUDE 24.1 NORTH...LONGITUDE 78.6 WEST. BONNIE IS MOVING TOWARD THE WEST-NORTHWEST NEAR 18 MPH...30 KM/HR. THIS MOTION IS EXPECTED TO CONTINUE DURING THE NEXT DAY OR SO. ON THE FORECAST TRACK...THE CENTER OF BONNIE IS EXPECTED TO PASS NEAR OR OVER THE FLORIDA KEYS AND THE SOUTHERN FLORIDA PENINSULA LATER TODAY...AND MOVE OVER THE EASTERN GULF OF MEXICO TONIGHT AND SATURDAY. BONNIE IS FORECAST TO APPROACH THE NORTHERN GULF COAST LATE SATURDAY OR EARLY SUNDAY. MAXIMUM SUSTAINED WINDS ARE NEAR 40 MPH...65 KM/HR...WITH HIGHER GUSTS. SLOW STRENGTHENING IS POSSIBLE DURING THE NEXT 48 HOURS. TROPICAL STORM FORCE WINDS EXTEND OUTWARD UP TO 85 MILES...140 KM FROM THE CENTER. ESTIMATED MINIMUM CENTRAL PRESSURE IS 1008 MB...29.77 INCHES. HAZARDS AFFECTING LAND ---------------------- WIND...TROPICAL STORM CONDITIONS WILL CONTINUE OVER PORTIONS OF THE NORTHWESTERN BAHAMAS THIS MORNING. TROPICAL STORM FORCE WINDS ARE EXPECTED TO SPREAD OVER SOUTHERN FLORIDA AND THE KEYS IN THE WARNING AREA LATER TODAY. RAINFALL...BONNIE IS EXPECTED TO PRODUCE TOTAL RAIN ACCUMULATIONS OF 1 TO 3 INCHES OVER SOUTH FLORIDA...WITH POSSIBLE ISOLATED MAXIMUM AMOUNTS OF 5 INCHES. ADDITIONAL RAINFALL AMOUNTS OF 1 TO 2 INCHES ARE POSSIBLE OVER THE NORTHWESTERN BAHAMAS. STORM SURGE...STORM SURGE WILL RAISE WATER LEVELS BY AS MUCH AS 1 TO 2 FEET ABOVE GROUND LEVEL OVER PORTIONS OF THE NORTHWESTERN BAHAMAS...THE FLORIDA KEYS...AND THE SOUTHERN FLORIDA PENINSULA. TORNADOES...ISOLATED TORNADOES ARE POSSIBLE OVER EXTREME SOUTHERN FLORIDA LATER TODAY. NEXT ADVISORY ------------- NEXT INTERMEDIATE ADVISORY...800 AM EDT. NEXT COMPLETE ADVISORY...1100 AM EDT. $$ FORECASTER BROWN/LANDSEA