000
WTNT34 KNHC 262047
TCPAT4
BULLETIN
HURRICANE IRENE ADVISORY NUMBER 26
NWS NATIONAL HURRICANE CENTER MIAMI FL AL092011
500 PM EDT FRI AUG 26 2011
...LARGE HURRICANE IRENE HEADING TOWARD THE EAST COAST OF THE UNITED STATES...HURRICANE WARNING EXTENDED NORTHWARD INTO SOUTHERN NEW ENGLAND....
SUMMARY OF 500 PM EDT...2100 UTC...INFORMATION
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LOCATION...31.7N 77.4W
ABOUT 265 MI...425 KM SSW OF CAPE HATTERAS NORTH CAROLINA
MAXIMUM SUSTAINED WINDS...100 MPH...160 KM/H
PRESENT MOVEMENT...N OR 360 DEGREES AT 14 MPH...22 KM/H
MINIMUM CENTRAL PRESSURE...951 MB...28.08 INCHES
WATCHES AND WARNINGS
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CHANGES IN WATCHES AND WARNINGS WITH THIS ADVISORY...
A HURRICANE WARNING HAS BEEN ISSUED FROM NORTH OF SANDY HOOK TO SAGAMORE BEACH MASSACHUSETTS...INCLUDING NEW YORK CITY...LONG ISLAND...LONG ISLAND SOUND...COASTAL CONNECTICUT AND RHODE ISLAND... BLOCK ISLAND...MARTHAS VINEYARD AND NANTUCKET.
A TROPICAL STORM WARNING HAS BEEN ISSUED FROM NORTH OF SAGAMORE BEACH TO THE MOUTH OF THE MERRIMACK RIVER.
A TROPICAL STORM WATCH HAS BEEN ISSUED FROM THE MOUTH OF THE MERRIMACK RIVER TO EASTPORT MAINE.
SUMMARY OF WATCHES AND WARNINGS IN EFFECT...
A HURRICANE WARNING IS IN EFFECT FOR...
* LITTLE RIVER INLET NORTH CAROLINA NORTHWARD TO SAGAMORE BEACH MASSACHUSETTS...INCLUDING THE PAMLICO...ALBEMARLE...AND CURRITUCK SOUNDS...DELAWARE BAY...CHESAPEAKE BAY SOUTH OF DRUM POINT...NEW YORK CITY...LONG ISLAND...LONG ISLAND SOUND...COASTAL CONNECTICUT AND RHODE ISLAND...BLOCK ISLAND...MARTHAS VINEYARD AND NANTUCKET.
A TROPICAL STORM WARNING IS IN EFFECT FOR...
* NORTH OF EDISTO BEACH SOUTH CAROLINA TO LITTLE RIVER INLET
* CHESAPEAKE BAY FROM DRUM POINT NORTHWARD AND THE TIDAL POTOMAC
* NORTH OF SAGAMORE BEACH TO MERRIMACK RIVER
A TROPICAL STORM WATCH IS IN EFFECT FOR...
* MERRIMACK RIVER TO EASTPORT MAINE
INTERESTS IN SOUTHEASTERN CANADA SHOULD MONITOR THE PROGRESS OF IRENE.
FOR STORM INFORMATION SPECIFIC TO YOUR AREA...INCLUDING POSSIBLE INLAND WATCHES AND WARNINGS...PLEASE MONITOR PRODUCTS ISSUED BY YOUR LOCAL NATIONAL WEATHER SERVICE FORECAST OFFICE.
DISCUSSION AND 48-HOUR OUTLOOK
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AT 500 PM EDT...2100 UTC...THE CENTER OF HURRICANE IRENE WAS LOCATED NEAR LATITUDE 31.7 NORTH...LONGITUDE 77.4 WEST. IRENE IS MOVING TOWARD THE NORTH NEAR 14 MPH...22 KM/H. A TURN TOWARD THE NORTH-NORTHEAST IS EXPECTED TONIGHT OR EARLY SATURDAY. ON THE FORECAST TRACK...THE CORE OF THE HURRICANE WILL APPROACH THE COAST OF NORTH CAROLINA TONIGHT AND PASS NEAR OR OVER THE NORTH CAROLINA COAST ON SATURDAY. THE HURRICANE IS FORECAST TO MOVE NEAR OR OVER THE MID-ATLANTIC COAST SATURDAY NIGHT AND MOVE OVER SOUTHERN NEW ENGLAND ON SUNDAY.
MAXIMUM SUSTAINED WINDS ARE NEAR 100 MPH...160 KM/H...WITH HIGHER GUSTS. IRENE IS A CATEGORY TWO HURRICANE ON THE SAFFIR-SIMPSON HURRICANE WIND SCALE. LITTLE CHANGE IN STRENGTH IS FORECAST BEFORE IRENE REACHES THE COAST OF NORTH CAROLINA. SOME WEAKENING IS EXPECTED AFTER THAT...BUT IRENE IS EXPECTED TO REMAIN A HURRICANE AS IT MOVES ALONG THE MID-ATLANTIC COAST ON SUNDAY.
IRENE IS A LARGE TROPICAL CYCLONE. HURRICANE FORCE WINDS EXTEND OUTWARD UP TO 90 MILES...150 KM...FROM THE CENTER...AND TROPICAL STORM FORCE WINDS EXTEND OUTWARD UP TO 290 MILES...465 KM. NOAA BUOY 41013 LOCATED ABOUT 40 MILES SOUTHEAST OF SOUTHPORT NORTH CAROLINA RECENTLY REPORTED A SUSTAINED WIND OF 46 MPH...75 KM/H... AND A GUST TO 60 MPH...96 KM/H.
THE ESTIMATED MINIMUM CENTRAL PRESSURE IS 951 MB...28.08 INCHES.
HAZARDS AFFECTING LAND
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WIND...TROPICAL STORM FORCE WINDS WILL SPREAD OVER THE SOUTHERN PORTION OF THE WARNING AREA DURING THE NEXT FEW HOURS. HURRICANE FORCE WINDS ARE EXPECTED TO FIRST REACH THE HURRICANE WARNING AREA OVERNIGHT TONIGHT. TROPICAL STORM FORCE WINDS ARE EXPECTED TO BEGIN ALONG THE MID-ATLANTIC COAST OVERNIGHT WITH HURRICANE CONDITIONS EXPECTED BY SATURDAY AFTERNOON. TROPICAL STORM CONDITIONS ARE EXPECTED TO REACH SOUTHERN NEW ENGLAND SATURDAY NIGHT WITH HURRICANE CONDITIONS EXPECTED ON SUNDAY.
STORM SURGE...AN EXTREMELY DANGEROUS STORM SURGE WILL RAISE WATER LEVELS BY AS MUCH AS 6 TO 11 FEET ABOVE GROUND LEVEL IN THE HURRICANE WARNING AREA IN NORTH CAROLINA...INCLUDING THE ALBEMARLE AND PAMLICO SOUNDS. STORM SURGE WILL RAISE WATER LEVELS BY AS MUCH AS 4 TO 8 FEET ABOVE GROUND LEVEL WITHIN THE HURRICANE WARNING AREA FROM THE NORTH CAROLINA/VIRGINIA BORDER NORTHWARD TO CAPE COD INCLUDING SOUTHERN PORTIONS OF THE CHESAPEAKE BAY AND ITS TRIBUTARIES. NEAR THE COAST...THE SURGE WILL BE ACCOMPANIED BY LARGE...DESTRUCTIVE...AND LIFE-THREATENING WAVES. STORM SURGE VALUES ARE VERY LOCATION-SPECIFIC...AND USERS ARE URGED TO CONSULT PRODUCTS ISSUED BY THEIR LOCAL NATIONAL WEATHER SERVICE OFFICES.
RAINFALL...IRENE IS EXPECTED TO PRODUCE RAINFALL ACCUMULATIONS OF 6 TO 10 INCHES...WITH ISOLATED MAXIMUM AMOUNTS OF 15 INCHES...FROM EASTERN NORTH CAROLINA NORTHWARD THROUGH THE MID-ATLANTIC STATES INTO NEW ENGLAND THROUGH MONDAY MORNING. THESE RAINS COULD CAUSE WIDESPREAD FLOODING AND LIFE-THREATENING FLASH FLOODS.
SURF...LARGE SWELLS GENERATED BY IRENE ARE AFFECTING PORTIONS OF THE COAST OF THE SOUTHEASTERN UNITED STATES. THESE SWELLS WILL CAUSE LIFE-THREATENING SURF AND RIP CURRENT CONDITIONS. TORNADOES...ISOLATED TORNADOES ARE POSSIBLE OVER EXTREME EASTERN NORTH CAROLINA LATE TONIGHT AND SATURDAY.
NEXT ADVISORY
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NEXT INTERMEDIATE ADVISORY...800 PM EDT.
NEXT COMPLETE ADVISORY...1100 PM EDT.
$$
FORECASTER BROWN/CANGIALOSI