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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
----------------------------------------------
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
--------------------
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
------------------------------
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
----------------------
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
-------------
NEXT INTERMEDIATE ADVISORY...800 PM EDT.
NEXT COMPLETE ADVISORY...1100 PM EDT.

$$
FORECASTER BROWN/CANGIALOSI


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