Hurricane Irene Advisory, August 23, 2011 (8 PM EDT)

Miami, Florida—(ENEWSPF)—August 23, 2011 UPDATE 8 PM EDT

...IRENE BEARING DOWN ON THE SOUTHEASTERN BAHAMAS…

SUMMARY NFORMATION

LOCATION…21.1N 71.8W

ABOUT 50 MI…80 KM WSW OF GRAND TURK ISLAND

ABOUT 90 MI…145 KM E OF GREAT INAGUA ISLAND

MAXIMUM SUSTAINED WINDS…90 MPH…150 KM/H

PRESENT MOVEMENT...WNW OR 295 DEGREES AT 9 MPH…15 KM/H

MINIMUM CENTRAL PRESSURE…969 MB…28.61 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…

  • TURKS AND CAICOS ISLANDS  
  • THE SOUTHEASTERN…CENTRAL…AND NORTHWESTERN BAHAMAS 

A TROPICAL STORM WARNING IS IN EFFECT FOR…

  • NORTH COAST OF HAITI FROM LE MOLE ST. NICHOLAS EASTWARD TO THE DOMINICAN REPUBLIC BORDER

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 PM EDT…0000 UTC…THE CENTER OF HURRICANE IRENE WAS LOCATED NEAR LATITUDE 21.1 NORTH…LONGITUDE 71.8 WEST.  IRENE IS MOVING TOWARD THE WEST-NORTHWEST NEAR 9 MPH…15 KM/H…AND THIS GENERAL MOTION IS EXPECTED TO CONTINUE THROUGH TONIGHT…FOLLOWED BY A TURN TOWARD THE NORTHWEST ON WEDNESDAY.  ON THE FORECAST TRACK…THE CORE OF IRENE WILL CONTINUE TO IMPACT THE TURKS AND CAICOS ISLANDS DURING THE NEXT SEVERAL HOURS…AND MOVE NEAR OR OVER THE SOUTHEASTERN AND CENTRAL BAHAMAS LATER TONIGHT AND WEDNESDAY…AND NEAR OR OVER THE NORTHWESTERN BAHAMAS ON THURSDAY.

MAXIMUM SUSTAINED WINDS REMAIN NEAR 90 MPH…150 KM/H…WITH HIGHER GUSTS.  IRENE IS A CATEGORY ONE HURRICANE ON THE SAFFIR-SIMPSON SCALE.  STRENGTHENING IS FORECAST DURING THE NEXT 48 HOURS…AND IRENE COULD BECOME A MAJOR HURRICANE WEDNESDAY NIGHT OR THURSDAY.

HURRICANE FORCE WINDS EXTEND OUTWARD UP TO 40 MILES…65 KM…FROM THE CENTER…AND TROPICAL STORM FORCE WINDS EXTEND OUTWARD UP TO 205 MILES…335 KM.

THE LATEST MINIMUM CENTRAL PRESSURE RECENTLY REPORTED BY A NOAA HURRICANE HUNTER PLANE WAS 969 MB…28.61 INCHES.

HAZARDS AFFECTING LAND

WIND…HURRICANE CONDITIONS WILL CONTINUE TO SPREAD OVER THE TURKS AND CAICOS ISLANDS THIS EVENING. TROPICAL STORM CONDITIONS WILL SPREAD OVER THE SOUTHEASTERN BAHAMAS THIS EVENING WITH HURRICANE CONDITIONS EXPECTED OVERNIGHT. TROPICAL STORM CONDITIONS ARE FORECAST TO REACH THE CENTRAL BAHAMAS LATE TONIGHT WITH HURRICANE CONDITIONS EXPECTED BY WEDNESDAY. TROPICAL STORM CONDITIONS ARE EXPECTED IN THE NORTHWESTERN BAHAMAS BY LATE WEDNESDAY…WITH HURRICANE CONDITIONS EXPECTED BY THURSDAY.

STORM SURGE…IN AREAS OF ONSHORE FLOW NEAR THE CENTER OF IRENE…AN EXTREMELY DANGEROUS STORM SURGE WILL RAISE WATER LEVELS BY AS MUCH AS 7 TO 11 FEET ABOVE NORMAL TIDE LEVELS OVER THE CENTRAL AND NORTHWESTERN BAHAMAS…AND BY AS MUCH AS 5 TO 8 FEET ABOVE NORMAL TIDE LEVELS OVER THE SOUTHEASTERN BAHAMAS AND THE TURKS AND CAICOS ISLANDS. NEAR THE COAST…THE SURGE WILL BE ACCOMPANIED BY LARGE AND DANGEROUS WAVES. A STORM SURGE WILL RAISE WATER LEVELS BY AS MUCH AS 2 TO 4 FEET ABOVE NORMAL TIDE LEVELS ALONG THE NORTH COAST OF HAITI.

RAINFALL…IRENE IS EXPECTED TO PRODUCE ADDITIONAL RAINFALL

ACCUMULATIONS OF 1 TO 3 INCHES ACROSS PUERTO RICO AND HISPANIOLA. ISOLATED MAXIMUM STORM TOTAL AMOUNTS OF 15 INCHES ARE POSSIBLE IN ASSOCIATION WITH IRENE. THESE RAINS COULD CAUSE LIFE-THREATENING FLASH FLOODS AND MUD SLIDES IN AREAS OF STEEP TERRAIN.  RAINFALL ACCUMULATIONS OF 6 TO 12 INCHES ARE EXPECTED IN THE BAHAMAS…AND THE TURKS AND CAICOS ISLANDS.

Source: nhc.noaa.gov

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