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| #47535 (Received by flhurricane at: 4:55 PM 21.Sep.2005) TCDAT3 HURRICANE RITA DISCUSSION NUMBER 17 NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 5 PM EDT WED SEP 21 2005 AND YET ANOTHER CATEGORY FIVE HURRICANE THIS SEASON. DATA FROM BOTH NOAA AND AIR FORCE HURRICANE HUNTERS INDICATE A SIGNIFICANT PRESSURE DROP TODAY AND WINDS HAVE INCREASED TO 145 KNOTS. THIS IS BASED ON A 700 MB WIND OF 161 KNOTS RECENTLY MEASURED BY AN AIR FORCE PLANE AND A RECALIBRATED SFMR SURFACE WIND OF 146 KNOTS. SATELLITE INTENSITY ESTIMATES WERE UNANIMOUSLY 140 KNOTS FROM ALL AGENCIES. BECAUSE RITA WILL BE CROSSING AN AREA OF HIGH HEAT CONTENT DURING THE NEXT 12 TO 24 HOURS...IT IS EXPECTED THAT THE HURRICANE WILL MAINTAIN ITS STRENGTH. THEREAFTER...THE OCEAN HEAT CONTENT IS NOT AS HIGH AND THE INTENSITY CHANGES WILL BE CONTROLLED MAINLY BY EYEWALL REPLACEMENT CYCLES AND DECREASING HEAT CONTENT. SOME WEAKENING IS ANTICIPATED BUT RITA IS FORECAST TO MAKE LANDFALL AS A MAJOR HURRICANE...AT LEAST CATEGORY THREE. THERE HAS BEEN NO CHANGE IN THE STEERING PATTERN AND RITA IS MOVING WESTWARD OR 275 DEGREES AT 11 KNOTS. THE HIGH PRESSURE SYSTEM THAT HAS BEEN FORCING RITA WESTWARD IS FORECAST TO WEAKEN AND SHIFT EASTWARD. THIS WILL ALLOW THE HURRICANE TO TURN GRADUALLY TOWARD THE WEST-NORTHWEST AND NORTHWEST DURING THE NEXT DAY OR TWO. THE CORE OF RITA IS BASICALLY MOVING TOWARD THE TEXAS COAST AND THIS IS CONSISTENT WITH THE TRACK MODEL CONSENSUS. THE WIND FIELD ASSOCIATED WITH THE HURRICANE HAS BEGUN TO EXPAND AND TROPICAL STORM FORCE WINDS ALREADY EXTEND ABOUT 150 N MI IN THE NORTHERN SEMICIRCLE. BECAUSE ADDITIONAL EXPANSION OF THE WIND FIELD IS ANTICIPATED...A HURRICANE WATCH AND A TROPICAL STORM WATCH HAVE BEEN ISSUED FOR THE NORTHWEST GULF COAST. FORECASTER AVILA FORECAST POSITIONS AND MAX WINDS INITIAL 21/2100Z 24.4N 86.8W 145 KT 12HR VT 22/0600Z 24.5N 88.5W 145 KT 24HR VT 22/1800Z 25.2N 90.6W 145 KT 36HR VT 23/0600Z 26.0N 92.7W 135 KT 48HR VT 23/1800Z 27.0N 94.5W 125 KT 72HR VT 24/1800Z 30.5N 97.0W 65 KT...INLAND 96HR VT 25/1800Z 33.0N 97.0W 30 KT...INLAND 120HR VT 26/1800Z 36.0N 96.0W 25 KT...INLAND |
