Ike has not undergone any rapid intensification since emerging from Cuba. Instead, it appears the wind field has expanded significantly. Interestingly, the storm also has a very tiny eye, about 8-10 nautical miles according to the 11PM NHC forecast discussion (Note the eye is not currently present on visible satellite imagery). The pressure has been falling today, which likely indicates some increase in wind speed is imminent.
Quote:
OVERALL...IKE IS A LARGE CYCLONE...AS DATA FROM BOTH AIR FORCE AND
NOAA HURRICANE HUNTER AIRCRAFT INDICATE THAT THE EXTENT OF WINDS OF
HURRICANE AND TROPICAL STORM FORCE HAS INCREASED...ESPECIALLY NORTH
OF THE CIRCULATION CENTER. PARADOXICALLY...IKE HAS A VERY SMALL
INNER CORE...AND THE EYE HAS A DIAMETER OF ONLY ABOUT 8 TO 10 N MI.
THE CENTRAL PRESSURE HAS BEEN STEADILY FALLING...NOW DOWN TO ABOUT
944 MB...BUT THE WINDS HAVE NOT YET RESPONDED. THE INITIAL
INTENSITY REMAINS 85 KT BASED ON RECENT SFMR WIND SPEED RETRIEVALS. THE SHORT-TERM INTENSITY FORECAST IS CONTINGENT UPON HOW LONG THE
EXTREMELY SMALL INNER CORE SURVIVES. SINCE IT COULD DISINTEGRATE
AT ANY TIME...AND SINCE IKE WILL BE PASSING NEAR OR OVER A COLD
EDDY IN THE CENTRAL GULF DURING THE NEXT 24 HOURS...THE HURRICANE
COULD WEAKEN. IF...HOWEVER...THE TENACIOUS INNER CORE REMAINS
INTACT...AND GIVEN THE RECENT PRESSURE FALLS...IKE COULD STRENGTHEN
SOME AS REFLECTED IN THE OFFICIAL FORECAST.
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The forecast still calls for Ike to be a category 4 storm in 48 hours.