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Hurricane IKE


ZCZC MIATCDAT4 ALL
TTAA00 KNHC DDHHMM
HURRICANE IKE DISCUSSION NUMBER  47
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL   AL092008
500 PM EDT FRI SEP 12 2008
 
IKE HAS BEEN UNDER CONSTANT SURVEILLANCE BY BOTH NOAA AND AIR FORCE
RECONNAISSANCE AIRCRAFT. THE DATA INDICATE THAT THE STRUCTURE OF
IKE HAS CHANGED VERY LITTLE AND THE HURRICANE CONTINUES WITH A LARGE
WIND FIELD AND LACKS A WELL-DEFINED TIGHT INNER CORE. INITIAL
INTENSITY IS KEPT AT 90 KNOTS. AS MENTIONED EARLIER...THERE IS
STILL A CHANCE THAT IKE COULD BECOME A MAJOR HURRICANE BEFORE
LANDFALL...BUT BASICALLY THIS IS LARGELY IRRELEVANT SINCE WE ARE
ONLY TALKING ABOUT A 10-KNOT WIND INCREASE.  STATE OF THE ART
TECHNIQUES TO FORECAST INTENSITY AND MY SKILLS ARE NOT GOOD ENOUGH
TO PREDICT SUCH CHANGE WITH PRECISION.  ALL WE NEED TO DO AT THIS
THIS TIME IS TO BE READY FOR A CATEGORY THREE HURRICANE. IKE WILL
WEAKEN AFTER LANDFALL...AND IT IS FORECAST TO BECOME EXTRATROPICAL
BY 48 HOURS...AND MERGE WITH A FRONTAL SYSTEM BY 72 HOURS.
 
IKE HAS CONTINUED ITS PUSH TOWARD THE WEST-NORTHWEST AND NORTHWEST
AT ABOUT 10 KNOTS. THE STEERING CURRENTS ARE NOT EXPECTED TO CHANGE
DURING THE NEXT 12 TO 24 HOURS AND THIS GENERAL MOTION SHOULD
CONTINUE UNTIL LANDFALL ON THE UPPER TEXAS COAST AFTER MIDNIGHT
TONIGHT.  I AM CONFIDENT IN THE TRACK FORECAST SINCE THE GUIDANCE
ENVELOPE IS VERY TIGHT AND MODELS TAKE IKE NOWHERE BUT TO THE UPPER
TEXAS COAST.  ONCE INLAND...IKE SHOULD REACH THE WESTERN EDGE OF
THE SUBTROPICAL RIDGE AND TURN NORTHWARD AND NORTHEASTWARD UNTIL IT
BECOMES ABSORBED BY A FRONTAL SYSTEM IN 2 TO 3 DAYS.
 
ONE SHOULD EMPHASIZE THAT IKE IS A VERY LARGE HURRICANE AND
REGARDLESS OF WHERE THE CENTER OF THE HURRICANE MAKES LANDFALL...THE
EFFECTS WILL BE FELT AT LARGE DISTANCES FROM THE CENTER. IN
ADDITION...THE LARGEST STORM SURGE WILL OCCUR WITHIN THE ONSHORE
FLOW NEAR OR JUST AFTER LANDFALL. A GAGE INDICATES THAT THE WATER
LEVEL HAS ALREADY RISEN MORE THAN 9 FEET ON PART OF GALVESTON
ISLAND.
  
 
FORECAST POSITIONS AND MAX WINDS
 
INITIAL      12/2100Z 27.7N  93.5W    90 KT
 12HR VT     13/0600Z 29.0N  94.8W    95 KT
 24HR VT     13/1800Z 31.5N  96.0W    65 KT...INLAND
 36HR VT     14/0600Z 35.0N  94.5W    30 KT...INLAND
 48HR VT     14/1800Z 38.5N  89.5W    30 KT...EXTRATROPICAL
 72HR VT     15/1800Z...ABSORBED BY A COLD FRONT
 
$$
FORECASTER AVILA
 
NNNN


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Page last modified: Tuesday, 21-Apr-2009 12:09:21 UTC