Official Discussion issued by the National Hurricane Center
IKE (AL092008) DATA RELEASED: 9/10/2008 9:00:00 AM UTC
Copy of official data HURRICANE IKE DISCUSSION NUMBER 37 NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL AL092008 500 AM EDT WED SEP 10 2008 SATELLITE IMAGES INDICATE THAT THE CLOUD PATTERN IS BECOMING BETTER ORGANIZED. AN AREA OF VERY DEEP CONVECTION HAS DEVELOPED NEAR THE CENTER AND THERE ARE NUMEROUS OF CYCLONICALLY CURVED BANDS. IKE CONTINUES TO BE A LARGE TROPICAL CYCLONE AND IS PRODUCING TROPICAL STORM FORCE WINDS OVER WESTERN CUBA AND A PORTION OF THE WESTERMOST FLORIDA KEYS. AN AIR FORCE RECONNAISSANCE AIRCRAFT CURRENTLY SAMPLING THE HURRICANE MEASURED A MINIMUM PRESSURE OF 963 MB AND SFMR WINDS OF 73 KNOTS. THE MAXIMIUM FLIGHT LEVEL WIND SO FAR IS 81 KNOTS. ON THIS BASIS...THE INITIAL INTENSITY IS ADJUSTED UP TO 75 KNOTS. ALL INDICATIONS ARE THAT IKE HAS BEGUN TO RECOVER FROM THE MANY HOURS OF INTERACTION WITH LAND. A GRADUAL STRENGTHENING SHOULD CONTINUE AS IKE MOVES OVER A COUPLE OF WARM EDDIES ASSOCIATED WITH THE LOOP CURRENT AND MOVES WITHIN A FAVORABLE UPPER-LEVEL ENVIRONMENT. THE OFFICIAL FORECAST MAKES IKE A CATEGORY THREE HURRICANE BASED ON A BLEND BETWEEN STATISTICAL AND DYNAMICAL HURRICANE MODELS. HOWEVER...THE INTENISITY FORECAST IS UNCERTAIN AND IKE COULD END UP BEING A CATEGORY HIGHER OR LOWER THAN FORECAST. RADAR AND RECONNAISSANCE FIXES INDICATE THAT IKE IS MOVING TOWARD THE WEST-NORTHWEST OR 300 DEGREES AT 7 KNOTS AROUND THE SOUTHWESTERN EDGE A STRONG SUBTROPICAL RIDGE OVER THE WESTERN ATLANTIC. MOST OF THE GLOBAL MODELS INDICATE THAT THE RIDGE WILL BUILD AND EXPAND WESTWARD FORCING IKE TO CONTINUE ON A GENERAL WEST-NORTHWEST TRACK FOR THE NEXT TREE DAYS ACROSS THE CENTRAL GULF OF MEXICO. THEREAFTER...THE HURRICANE SHOULD TURN MORE TO THE NORTHWEST AND NORTH AROUND THE WESTERN EDGE OF THE HIGH. MOST OF THE GUIDANCE SUGGESTS THAT THE NORTHWARD TURN WILL OCCUR AFTER THE CYCLONE IS ALREADY INLAND. I HAVE HIGH CONFIDENCE IN THE 24 TO 48 HOUR FORECAST TRACK SINCE GUIDANCE IS TIGHTLY CLUSTERED. THEREAFTER...THE CONFIDENCE IS NOT SO HIGH BECAUSE THE MODELS ARE MORE SPREAD OUT...BUT THEY ALL BRING THE HURRICANE ASHORE ALONG THE TEXAS COAST IN ABOUT THREE DAYS...AND SO DOES THE OFFICIAL FORECAST. FORECAST POSITIONS AND MAX WINDS INITIAL 10/0900Z 23.5N 84.9W 75 KT 12HR VT 10/1800Z 24.0N 86.0W 80 KT 24HR VT 11/0600Z 24.7N 87.7W 90 KT 36HR VT 11/1800Z 25.2N 89.7W 100 KT 48HR VT 12/0600Z 25.8N 92.0W 105 KT 72HR VT 13/0600Z 27.5N 96.5W 105 KT 96HR VT 14/0600Z 31.5N 98.0W 40 KT...INLAND 120HR VT 15/0600Z 34.5N 97.0W 25 KT...EXTRATROPICAL $$ FORECASTER AVILA |