8am Sandy Update

8am Sandy Update

BULLETIN
HURRICANE SANDY INTERMEDIATE ADVISORY NUMBER 24A
NWS NATIONAL HURRICANE CENTER MIAMI FL AL182012
800 AM EDT SUN OCT 28 2012

…SANDY EXPECTED TO BRING LIFE-THREATENING STORM SURGE FLOODING TO
THE MID-ATLANTIC COAST…INCLUDING LONG ISLAND SOUND AND NEW YORK
HARBOR…
…WINDS EXPECTED TO BE NEAR HURRICANE FORCE AT LANDFALL…

SUMMARY OF 800 AM EDT…1200 UTC…INFORMATION
———————————————-
LOCATION…32.1N 73.1W
ABOUT 260 MI…420 KM SE OF CAPE HATTERAS NORTH CAROLINA
ABOUT 395 MI…635 KM E OF NEW YORK CITY NEW YORK
MAXIMUM SUSTAINED WINDS…75 MPH…120 KM/H
PRESENT MOVEMENT…NE OR 40 DEGREES AT 10 MPH…17 KM/H
MINIMUM CENTRAL PRESSURE…951 MB…28.08 INCHES

WATCHES AND WARNINGS
——————–
CHANGES WITH THIS ADVISORY…

NONE.

SUMMARY OF WATCHES AND WARNINGS IN EFFECT…

A TROPICAL STORM WARNING IS IN EFFECT FOR…
* CAPE FEAR TO DUCK NORTH CAROLINA
* PAMLICO AND ALBEMARLE SOUNDS
* BERMUDA

HIGH WIND WATCHES AND WARNINGS FOR HURRICANE-FORCE WINDS ARE IN
EFFECT FOR PORTIONS OF THE MID-ATLANTIC STATES. OTHER WATCHES AND
WARNINGS ARE IN EFFECT FOR MUCH OF NEW ENGLAND. SEE STATEMENTS FROM
LOCAL NATIONAL WEATHER SERVICE FORECAST OFFICES.

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 800 AM EDT…1200 UTC…THE CENTER OF HURRICANE SANDY WAS LOCATED
NEAR LATITUDE 32.1 NORTH…LONGITUDE 73.1 WEST. SANDY IS MOVING
TOWARD THE NORTHEAST NEAR 10 MPH…17 KM/H…AND THIS GENERAL
MOTION IS FORECAST TO CONTINUE THROUGH TODAY. A TURN TOWARD THE
NORTH AND THEN NORTHWEST IS FORECAST ON MONDAY. ON THE FORECAST
TRACK…THE CENTER OF SANDY WILL MOVE PARALLEL TO THE SOUTHEAST
COAST OF THE UNITED STATES TODAY AND TONIGHT…AND APPROACH THE
COAST OF THE MID-ATLANTIC STATES BY MONDAY NIGHT.

MAXIMUM SUSTAINED WINDS ARE NEAR 75 MPH…120 KM/H…WITH HIGHER
GUSTS. LITTLE CHANGE IN STRENGTH IS FORECAST DURING THE NEXT
COUPLE OF DAYS…AND SANDY IS EXPECTED TO BRING HURRICANE-FORCE
WINDS TO PORTIONS OF THE MID-ATLANTIC STATES.

HURRICANE-FORCE WINDS EXTEND OUTWARD UP TO 175 MILES…280 KM…FROM
THE CENTER…AND TROPICAL-STORM-FORCE WINDS EXTEND OUTWARD UP TO
520 MILES…835 KM. A SHIP LOCTAED ABOUT 100 MILES SOUTH OF
MOREHEAD CITY NORTH CAROLINA RECENTLY REPORTED SUSTAINED WINDS NEAR
HURRICANE FORCE. ALSO…NOAA BUOY 41036…LOCATED IN ONSLOW BAY
NEAR THE NORTH CAROLINA COAST…RECENTLY REPORTED SUSTAINED WINDS
OF 47 MPH…76 KM/H…AND A WIND GUST OF 59 MPH…94 KM/H.

THE MINIMUM CENTRAL PRESSURE RECENTLY REPORTED BY NOAA AND AIR FORCE
RESERVE HURRICANE HUNTER AIRCRAFT WAS 951 MB…28.08 INCHES.

HAZARDS AFFECTING LAND
———————-
WIND…TROPICAL STORM CONDITIONS ARE SPREADING ACROSS THE COAST OF
NORTH CAROLINA IN THE TROPICAL STORM WARNING AREA…AND THESE
SHOULD CONTINUE THROUGH TODAY. GALE FORCE WINDS ARE EXPECTED TO
ARRIVE ALONG PORTIONS OF THE MID-ATLANTIC COAST LATER TODAY…AND
REACH LONG ISLAND AND SOUTHERN NEW ENGLAND BY MONDAY MORNING. WINDS
AT OR NEAR HURRICANE FORCE COULD REACH THE MID-ATLANTIC STATES…
INCLUDING LONG ISLAND…BY LATE MONDAY.

STORM SURGE…THE COMBINATION OF AN EXTREMELY DANGEROUS STORM SURGE
AND THE TIDE WILL CAUSE NORMALLY DRY AREAS NEAR THE COAST TO BE
FLOODED BY RISING WATERS. THE WATER COULD REACH THE FOLLOWING
DEPTHS ABOVE GROUND IF THE PEAK SURGE OCCURS AT THE TIME OF HIGH
TIDE…

NC SOUTH OF SURF CITY…1 TO 3 FT
NC NORTH OF SURF CITY INCLUDING PAMLICO/ALBEMARLE SNDS…4 TO 6 FT
SE VA AND DELMARVA INCLUDING LOWER CHESAPEAKE BAY…2 TO 4 FT
UPPER AND MIDDLE CHESAPEAKE BAY…1 TO 2 FT
LONG ISLAND SOUND AND RARITAN BAY INCLUDING NEW YORK HARBOR…6 TO
11 FT
ELSEWHERE FROM OCEAN CITY MD TO THE CT/RI BORDER…4 TO 8 FT
CT/RI BORDER TO THE SOUTH SHORE OF CAPE COD INCLUDING BUZZARDS
BAY…3 TO 5 FT

SURGE-RELATED FLOODING DEPENDS ON THE RELATIVE TIMING OF THE SURGE
AND THE TIDAL CYCLE…AND CAN VARY GREATLY OVER SHORT DISTANCES.
GIVEN THE LARGE WIND FIELD ASSOCIATED WITH SANDY…ELEVATED WATER
LEVELS COULD SPAN MULTIPLE TIDE CYCLES RESULTING IN REPEATED AND
EXTENDED PERIODS OF COASTAL AND BAYSIDE FLOODING. IN ADDITION…
ELEVATED WATERS COULD OCCUR FAR REMOVED FROM THE CENTER OF SANDY.
FURTHERMORE…THESE CONDITIONS WILL OCCUR REGARDLESS OF WHETHER
SANDY IS A TROPICAL OR POST-TROPICAL CYCLONE. FOR INFORMATION
SPECIFIC TO YOUR AREA…PLEASE SEE PRODUCTS ISSUED BY YOUR LOCAL
NATIONAL WEATHER SERVICE OFFICE.

RAINFALL…RAINFALL TOTALS OF 3 TO 6 INCHES ARE EXPECTED OVER FAR
NORTHEASTERN NORTH CAROLINA WITH ISOLATED MAXIMUM TOTALS OF 8 INCHES
POSSIBLE. RAINFALL AMOUNTS OF 4 TO 8 INCHES ARE EXPECTED OVER
PORTIONS OF THE MID-ATLANTIC STATES…INCLUDING THE DELMARVA
PENINSULA…WITH ISOLATED MAXIMUM AMOUNTS OF 12 INCHES POSSIBLE.
RAINFALL AMOUNTS OF 1 TO 3 INCHES WITH ISOLATED MAXIMUM AMOUNTS OF
5 INCHES ARE POSSIBLE FROM THE SOUTHERN TIER OF NEW YORK STATE
NORTHEASTWARD THROUGH NEW ENGLAND.

SURF…DANGEROUS SURF CONDITIONS WILL CONTINUE FROM FLORIDA THROUGH
THE MID-ATLANTIC STATES FOR THE NEXT COUPLE OF DAYS AND SPREAD INTO
THE NORTHEASTERN STATES LATER TODAY.

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