000 AXNT20 KNHC 170551 TWDAT TROPICAL WEATHER DISCUSSION NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 205 AM EDT MON AUG 17 2009 TROPICAL WEATHER DISCUSSION FOR NORTH AMERICA...CENTRAL AMERICA...GULF OF MEXICO...CARIBBEAN SEA...NORTHERN SECTIONS OF SOUTH AMERICA...AND ATLANTIC OCEAN TO THE AFRICAN COAST FROM THE EQUATOR TO 32N. THE FOLLOWING INFORMATION IS BASED ON SATELLITE IMAGERY...METEOROLOGICAL ANALYSIS...WEATHER OBSERVATIONS...AND RADAR. BASED ON 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 0415 UTC. ...SPECIAL FEATURES... TROPICAL STORM CLAUDETTE MADE LANDFALL NEAR THE EASTERN END OF SANTA ROSA ISLAND...JUST SOUTHEAST OF FORT WALTON BEACH FLORIDA AROUND 0510 UTC. T.S. CLAUDETTE IS CENTERED NEAR 30.5N 86.6W AT 17/0600 UTC OR OR JUST INLAND NEAR FORT WALTON BEACH FLORIDA MOVING NW AT 10 KT. ESTIMATED MINIMUM CENTRAL PRESSURE IS 1006 MB. MAXIMUM SUSTAINED WIND SPEED IS 45 KT WITH GUSTS TO 55 KT. SEE LATEST NHC INTERMEDIATE PUBLIC ADVISORY UNDER AWIPS/WMO HEADERS MIATCPAT4/WTNT34 KNHC AND THE FULL FORECAST/ADVISORY UNDER AWIPS/WMO HEADERS MIATCMAT4/WTNT24 KNHC FOR MORE DETAILS. SCATTERED MODERATE/ISOLATED STRONG CONVECTION COVERS THE AREA FROM 28N TO INLAND OVER THE FLORIDA PANHANDLE BETWEEN 83W-86W. SCATTERED SHOWERS/ISOLATED THUNDERSTORMS ARE N OF 27N E OF 93W TO JUST INLAND OVER THE NE GULF COAST STATES. TROPICAL STORM BILL IS CENTERED NEAR 13.4N 41.7W AT 17/0300 UTC OR ABOUT 1150 NM E OF THE LESSER ANTILLES MOVING WNW AT 17 KT. ESTIMATED MINIMUM CENTRAL PRESSURE IS 990 MB. MAXIMUM SUSTAINED WIND SPEED IS 60 KT WITH GUSTS TO 75 KT. SEE LATEST NHC FORECAST/ADVISORY UNDER AWIPS/WMO HEADERS MIATCMAT3/WTNT23 KNHC FOR MORE DETAILS. SCATTERED MODERATE/ISOLATED STRONG CONVECTION IS WITHIN 75 NM OF LINE FROM 11N42W TO 14N44W. SCATTERED MODERATE CONVECTION COVERS THE REMAINDER OF THE AREA FROM 10N-16N BETWEEN 39W-44W. TROPICAL DEPRESSION ANA IS CENTERED NEAR 16.3N 62.4W AT 17/0600 UTC OR ABOUT 40 NM WEST OF GUADELOUPE AND ABOUT 160 NM EAST-SOUTHEAST OF ST. CROIX. ESTIMATED MINIMUM CENTRAL PRESSURE IS 1008 MB. MAXIMUM SUSTAINED WIND SPEED IS 30 KT WITH GUSTS TO 40 KT. SEE LATEST NHC INTERMEDIATE PUBLIC ADVISORY UNDER AWIPS/WMO HEADERS MIATCPAT2/ WTNT32 KNHC AND THE FORECAST/ ADVISORY UNDER AWIPS/WMO HEADERS MIATCMAT2/WTNT22 KNHC FOR MORE DETAILS. SCATTERED MODERATE/ISOLATED STRONG CONVECTION IS OVER THE LEEWARD ISLANDS FROM 14N-18.5N BETWEEN 60.5W-63.5W. ...TROPICAL WAVES... TROPICAL WAVE IS 17N26W TO 9N22W MOVING W 10-15 KT. WAVE IS EMBEDDED WITHIN AN AREA OF MAXIMUM DEEP LAYERED MOISTURE AS INDICATED BY THE TOTAL PRECIPITABLE WATER IMAGERY. SMALL CLUSTERS OF SCATTERED MODERATE/ISOLATED STRONG CONVECTION ARE FROM 12N-16N BETWEEN 20W-24W. TROPICAL WAVE IS ALONG 91W S OF 22N MOVING W 10-15 KT. WAVE IS EMBEDDED WITHIN A BROAD AREA OF DEEP LAYER MOISTURE AS INDICATED BY THE TOTAL PRECIPITABLE WATER IMAGERY. WAVE REMAINS ON THE ERN SIDE OF AN UPPER LOW THAT CONTINUES TO ENHANCE SCATTERED SHOWERS/ISOLATED THUNDERSTORMS OVER PORTIONS OF CENTRAL AMERICA...THE YUCATAN PENINSULA AND S GULF S OF 26N FROM 88W-93W. ...ITCZ... THE ITCZ AXIS IS CENTERED ALONG 15N15W 11N28W 13N38W 11N45W 9N62W. SCATTERED MODERATE/ISOLATED STRONG CONVECTION IS FROM 11N-15N BETWEEN THE COAST OF W AFRICA AND 20W. CLUSTERS OF SCATTERED MODERATE CONVECTION ARE FROM 6N-10N BETWEEN 24W-33W AND FROM 5N-11N BETWEEN 43W-52W. ...DISCUSSION... GULF OF MEXICO... THE GULF IS BEING IMPACTED BY TROPICAL STORM CLAUDETTE THAT CONTINUES TO MOVE INLAND OVER THE FLORIDA PANHANDLE TONIGHT AND A TROPICAL WAVE ALONG 91W. IN THE UPPER LEVELS IS AN UPPER LOW CENTERED OVER S MEXICO/BAY OF CAMPECHE NEAR 19N95W ENHANCING THE ACTIVITY ASSOCIATED WITH THE TROPICAL WAVE COVERING THE S PORTION OF THE GULF. AN UPPER HIGH IS OVER THE NE GULF ALONG THE FLORIDA COAST NEAR T.S. CLAUDETTE. RELATIVELY DRY AIR AND CLEAR SKIES PREVAIL ACROSS THE W GULF W OF 93W. A WEAK SURFACE RIDGE IS BEGINNING TO PUSH S OF CLAUDETTE OVER THE S GULF. CARIBBEAN SEA... T.D. ANA IS IMPACTING THE LEEWARD ISLANDS AND THIS ACTIVITY WILL BE MOVING TOWARD THE VIRGIN ISLANDS AND PUERTO RICO DURING THE EARLY MORNING HOURS. A NARROW UPPER RIDGE EXTENDS FROM E PANAMA NW TO THE YUCATAN CHANNEL JUST TO THE E OF THE UPPER LOW OVER THE S GULF OF MEXICO PROVIDING DIFFLUENCE ALOFT TO THE W TO GENERATE SCATTERED SHOWERS/ISOLATED THUNDERSTORMS SW OF A LINE FROM PANAMA NEAR 9N79W TO THE NE TIP OF THE YUCATAN PENINSULA AND INLAND OVER CENTRAL AMERICA. AN UPPER LOW OVER THE W ATLC EXTENDS S OF THE GREATER ANTILLES TO JAMAICA BETWEEN HISPANIOLA AND CENTRAL CUBA GENERATING SCATTERED SHOWERS/ISOLATED THUNDERSTORMS N OF 19N FROM HAITI TO 80W. OTHERWISE THE REMAINDER OF THE CARIBBEAN IS UNDER A DEEP LAYER DRY AIR AND GENERALLY FAIR WEATHER WITH FRESH TRADE WINDS USHERING IN LOW LEVEL FAST MOVING ISOLATED SHOWERS ACROSS THE E CARIBBEAN TO 70W. ATLANTIC OCEAN... TROPICAL ATLC IS BEING IMPACTED BY HURRICANE BILL. AN UPPER LOW COVERS THE W ATLC CENTERED NEAR 24N73W AND SUPPORTS A SURFACE TROUGH THAT EXTENDS FROM 31N65W TO 26N70W WITH SCATTERED SHOWERS/ISOLATED THUNDERSTORMS COVERING THE AREA S OF 30N ACROSS THE BAHAMAS AND CUBA W OF THE SURFACE TROUGH TO 80W. TO THE E OF THE UPPER LOW...AN UPPER LEVEL RIDGE IS GENERATING SCATTERED SHOWERS/ISOLATED THUNDERSTORMS FROM 24N-27N BETWEEN 60W-65W. A BROAD SURFACE RIDGE DOMINATES THE REMAINDER OF THE ATLC ANCHORED BY A 1023 MB HIGH CENTERED NEAR 32N33W N OF BERMUDA AND A PAIR OF 1025 MB HIGHS IN THE NE ATLC THUS GIVING THE CENTRAL AND ERN ATLC GENERALLY FAIR WEATHER. $$ WALLACE