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| #454163 (Received by flhurricane at: 1:58 AM 28.Aug.2011) TCPAT4 BULLETIN HURRICANE IRENE INTERMEDIATE ADVISORY NUMBER 31A NWS NATIONAL HURRICANE CENTER MIAMI FL AL092011 200 AM EDT SUN AUG 28 2011 ...IRENE MOVING UP THE MID-ATLANTIC COAST...WATER LEVELS RISING FROM MARYLAND TO NEW YORK... SUMMARY OF 200 AM EDT...0600 UTC...INFORMATION ---------------------------------------------- LOCATION...38.1N 75.0W ABOUT 15 MI...25 KM SSE OF OCEAN CITY MARYLAND ABOUT 195 MI...315 KM SSW OF NEW YORK CITY MAXIMUM SUSTAINED WINDS...80 MPH...130 KM/H PRESENT MOVEMENT...NNE OR 20 DEGREES AT 17 MPH...28 KM/H MINIMUM CENTRAL PRESSURE...958 MB...28.29 INCHES WATCHES AND WARNINGS -------------------- CHANGES IN WATCHES AND WARNINGS WITH THIS ADVISORY... NONE. SUMMARY OF WATCHES AND WARNINGS IN EFFECT... A HURRICANE WARNING IS IN EFFECT FOR... * CAPE LOOKOUT 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... * CHESAPEAKE BAY FROM DRUM POINT NORTHWARD AND THE TIDAL POTOMAC * NORTH OF SAGAMORE BEACH TO EASTPORT MAINE * UNITED STATES/CANADA BORDER NORTHEASTWARD TO FORT LAWRENCE INCLUDING GRAND MANAN * SOUTH COAST OF NOVA SCOTIA FROM FORT LAWRENCE TO PORTERS LAKE INTERESTS ELSEWHERE IN EASTERN CANADA SHOULD MONITOR THE PROGRESS OF IRENE. 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 THE UNITED STATES...PLEASE MONITOR PRODUCTS ISSUED BY YOUR NATIONAL METEOROLOGICAL SERVICE. DISCUSSION AND 48-HOUR OUTLOOK ------------------------------ AT 200 AM EDT...0600 UTC...THE CENTER OF HURRICANE IRENE WAS LOCATED BY AN AIR FORCE RESERVE HURRICANE HUNTER AIRCRAFT NEAR LATITUDE 38.1 NORTH...LONGITUDE 75.0 WEST. IRENE IS MOVING TOWARD THE NORTH-NORTHEAST NEAR 17 MPH...28 KM/H...AND THIS MOTION ACCOMPANIED BY A GRADUAL INCREASE IN FORWARD SPEED IS EXPECTED DURING THE NEXT DAY OR SO. ON THE FORECAST TRACK...THE CENTER OF IRENE WILL MOVE NEAR OR OVER THE MID-ATLANTIC COAST THIS MORNING...AND MOVE OVER SOUTHERN NEW ENGLAND BY THIS AFTERNOON. IRENE IS FORECAST TO MOVE INTO EASTERN CANADA SUNDAY NIGHT. MAXIMUM SUSTAINED WINDS REMAIN NEAR 80 MPH...130 KM/H...WITH HIGHER GUSTS. IRENE IS A CATEGORY ONE HURRICANE ON THE SAFFIR-SIMPSON HURRICANE WIND SCALE. IRENE IS FORECAST TO REMAIN A HURRICANE AS IT MOVES NEAR OR OVER THE MID-ATLANTIC COAST AND APPROACHES NEW ENGLAND TODAY. IRENE IS FORECAST TO WEAKEN AFTER LANDFALL IN NEW ENGLAND AND BECOME A POST-TROPICAL CYCLONE SUNDAY NIGHT OR EARLY MONDAY. IRENE IS A LARGE TROPICAL CYCLONE. HURRICANE-FORCE WINDS ARE LOCATED OVER A RELATIVELY SMALL AREA EAST OF THE CENTER. TROPICAL-STORM-FORCE WINDS EXTEND OUTWARD UP TO 240 MILES...390 KM FROM THE CENTER. A SUSTAINED WIND OF 48 MPH...78 KM/H...AND A WIND GUST OF 68 MPH... 109 KM/H...WERE RECENTLY REPORTED AT A NATIONAL OCEAN SERVICE OBSERVING SITE NEAR NEWPORT NEWS VIRGINIA. SUSTAINED WINDS OF TROPICAL STORM FORCE ARE STILL OCCURRING AS FAR SOUTH AS DUCK NORTH CAROLINA WHERE A SUSTAINED WIND OF 48 MPH...78 KM/H...AND A WIND GUST OF 68 MPH...109 KM/H...WERE ALSO RECENTLY REPORTED. WATER LEVELS HAVE BEEN RISING RAPIDLY IN ADVANCE OF THE CENTER OF IRENE...WITH RECENTLY OBSERVED STORM SURGE VALUES OF 3.2 FEET AT OCEAN CITY MARYLAND...3.7 FEET AT LEWES DELAWARE...3.4 FEET AT CAPE MAY NEW JERSEY...AND 3.5 FEET AT NEW YORK HARBOR. RAINFALL AMOUNTS OF 10 TO 14 INCHES HAVE ALREADY OCCURRED OVER A LARGE PORTION OF EASTERN NORTH CAROLINA AND EXTREME SOUTHEASTERN VIRGINIA...WITH THE HIGHEST AMOUNT THUS FAR OF 14 INCHES REPORTED AT BUNYAN NORTH CAROLINA. THE LATEST MINIMUM CENTRAL PRESSURE REPORTED BY THE HURRICANE HUNTER AIRCRAFT WAS 958 MB...28.29 INCHES. A NATIONAL OCEAN SERVICE OBSERVING SITE AT OCEAN CITY MARYLAND RECENTLY REPORTED A PRESSURE OF 970 MB...28.63 IN. HAZARDS AFFECTING LAND ---------------------- STORM SURGE...AN EXTREMELY DANGEROUS 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. HIGHER THAN NORMAL ASTRONOMICAL TIDES ARE OCCURRING THIS WEEKEND. COASTAL AND RIVER FLOODING WILL BE HIGHEST IN AREAS WHERE THE PEAK SURGE OCCURS AROUND THE TIME OF HIGH TIDE. STORM TIDE AND SURGE VALUES ARE VERY LOCATION-SPECIFIC...AND USERS ARE URGED TO CONSULT PRODUCTS ISSUED BY THEIR LOCAL NATIONAL WEATHER SERVICE OFFICES. ALONG THE NORTH CAROLINA COAST...INCLUDING THE ALBEMARLE AND PAMLICO SOUNDS...WATER LEVEL VALUES WILL GRADUALLY SUBSIDE THIS MORNING. RAINFALL...IRENE IS EXPECTED TO PRODUCE RAINFALL ACCUMULATIONS OF 6 TO 12 INCHES...WITH ISOLATED MAXIMUM AMOUNTS OF 20 INCHES...FROM EASTERN NORTH CAROLINA NORTHWARD THROUGH THE MID-ATLANTIC STATES INTO EASTERN NEW YORK AND INTERIOR NEW ENGLAND. THESE RAINS... COMBINED WITH HEAVY RAINS OVER THE PAST FEW WEEKS...COULD CAUSE WIDESPREAD FLOODING...LIFE-THREATENING FLASH FLOODS...AND SIGNIFICANT UPROOTING OF TREES DUE TO RAIN-SOFTENED GROUNDS. WIND...TROPICAL-STORM-FORCE WINDS WILL CONTINUE TO SPREAD NORTHWARD ALONG THE MID-ATLANTIC COAST THIS MORNING...WITH GUSTS TO HURRICANE FORCE POSSIBLE BY DAYBREAK. TROPICAL STORM CONDITIONS ARE EXPECTED TO REACH LONG ISLAND AND SOUTHERN NEW ENGLAND EARLY THIS MORNING... WITH HURRICANE-FORCE WINDS...ESPECIALLY IN GUSTS...EXPECTED BY MIDDAY. WINDS AFFECTING THE UPPER FLOORS OF HIGH-RISE BUILDINGS WILL BE SIGNIFICANTLY STRONGER THAN THOSE NEAR GROUND LEVEL. TORNADOES...ISOLATED TORNADOES ARE POSSIBLE OVER SOUTHERN DELAWARE...EASTERN NEW JERSEY...SOUTHEASTERN NEW YORK...AND EXTREME SOUTHERN NEW ENGLAND THROUGH THIS MORNING. SURF...LARGE SWELLS GENERATED BY IRENE ARE AFFECTING MUCH OF THE EAST COAST OF THE UNITED STATES. THESE SWELLS WILL CAUSE LIFE-THREATENING SURF AND RIP CURRENT CONDITIONS. NEXT ADVISORY ------------- NEXT COMPLETE ADVISORY...500 AM EDT. $$ FORECASTER BRENNAN |
