000 WTNT31 KNHC 212031 TCPAT1 BULLETIN HURRICANE IGOR ADVISORY NUMBER 55 NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL AL112010 500 PM AST TUE SEP 21 2010 ...IGOR BECOMES POST-TROPICAL... SUMMARY OF 500 PM AST...2100 UTC...INFORMATION ---------------------------------------------- LOCATION...49.3N 51.7W ABOUT 125 MI...200 KM NNE OF ST. JOHNS NEWFOUNDLAND MAXIMUM SUSTAINED WINDS...80 MPH...130 KM/HR PRESENT MOVEMENT...NNE OR 25 DEGREES AT 39 MPH...63 KM/HR MINIMUM CENTRAL PRESSURE...950 MB...28.05 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY... NONE. SUMMARY OF WATCHES AND WARNINGS IN EFFECT... A HURRICANE WATCH IS IN EFFECT FOR... * THE COAST OF NEWFOUNDLAND FROM STONES COVE NORTHWARD AND EASTWARD TO FOGO ISLAND A TROPICAL STORM WARNING IS IN EFFECT FOR... * THE COAST OF NEWFOUNDLAND FROM BURGEO NORTHWARD AND EASTWARD TO TRITON * THE ISLANDS OF ST-PIERRE AND MIQUELON THESE WATCHES AND WARNINGS WILL LIKELY BE DISCONTINUED THIS EVENING OR TONIGHT. FOR STORM INFORMATION SPECIFIC TO YOUR AREA IN THE UNITED STATES...PLEASE MONITOR PRODUCTS ISSUED BY YOUR LOCAL NATIONAL WEATHER SERVICE FORECAST OFFICE. FOR STORM INFORMATION SPECIFIC TO YOUR AREA OUTSIDE THE UNITED STATES...PLEASE MONITOR PRODUCTS ISSUED BY YOUR NATIONAL METEOROLOGICAL SERVICE. DISCUSSION AND 48-HOUR OUTLOOK ------------------------------ AT 500 PM AST...2100 UTC...THE CENTER OF POST-TROPICAL CYCLONE IGOR WAS LOCATED NEAR LATITUDE 49.3 NORTH...LONGITUDE 51.7 WEST. IGOR IS MOVING TOWARD THE NORTH-NORTHEAST NEAR 39 MPH...63 KM/HR. A TURN TOWARD THE NORTH WITH A DECREASE IN FORWARD SPEED IS EXPECTED BY WEDNESDAY...FOLLOWED BY A TURN TOWARD THE NORTHWEST BY THURSDAY. MAXIMUM SUSTAINED WINDS ARE NEAR 80 MPH...130 KM/HR...WITH HIGHER GUSTS. LITTLE CHANGE IN STRENGTH IS EXPECTED DURING THE NEXT 24 HOURS...BUT THE CYCLONE SHOULD BEGIN TO GRADUALLY WEAKEN BY LATE WEDNESDAY. HURRICANE FORCE WINDS EXTEND OUTWARD UP TO 85 MILES...140 KM...FROM THE CENTER...AND TROPICAL STORM FORCE WINDS EXTEND OUTWARD UP TO 520 MILES...835 KM. ESTIMATED MINIMUM CENTRAL PRESSURE IS 950 MB...28.05 INCHES. HAZARDS AFFECTING LAND ---------------------- WIND...WINDS OF TROPICAL STORM FORCE AND VERY NEAR HURRICANE FORCE...ESPECIALLY IN GUSTS...ARE OCCURRING IN PARTS OF NEWFOUNDLAND. THESE WINDS WILL LIKELY DIMINISH TONIGHT AS IGOR MOVES FARTHER TO THE NORTH. RAINFALL...THE SIGNIFICANT RAINFALL THREAT OVER NEWFOUNDLAND ASSOCIATED WITH IGOR HAS COME TO AN END. RAINFALL WILL BE TAPERING OFF THIS EVENING AS IGOR MOVES RAPIDLY NORTH-NORTHEASTWARD. SURF...LARGE SWELLS ALONG THE EAST COAST OF THE UNITED STATES WILL BE SUBSIDING TONIGHT. SWELLS WILL BE SLOW TO SUBSIDE IN NOVA SCOTIA...NEWFOUNDLAND...PUERTO RICO...THE VIRGIN ISLANDS... HISPANIOLA...AND PORTIONS OF THE BAHAMAS DURING THE NEXT COUPLE OF DAYS. THESE SWELLS ARE LIKELY TO CAUSE LIFE-THREATENING SURF AND RIP CURRENTS. PLEASE CONSULT PRODUCTS FROM YOUR LOCAL WEATHER OFFICE FOR ADDITIONAL INFORMATION. NEXT ADVISORY ------------- THIS IS THE LAST PUBLIC ADVISORY ISSUED BY THE NATIONAL HURRICANE CENTER ON IGOR. ADDITIONAL INFORMATION ON THIS SYSTEM CAN BE FOUND IN HIGH SEAS FORECASTS ISSUED BY THE NATIONAL WEATHER SERVICE... UNDER AWIPS HEADER NFDHSFAT1 AND WMO HEADER FZNT01 KWBC. $$ FORECASTER BERG