000 AGXX40 KNHC 090512 MIMATS MARINE WEATHER DISCUSSION NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 130 AM EDT SUN SEP 9 2007 MARINE WEATHER DISCUSSION FOR GULF OF MEXICO...CARIBBEAN SEA AND SOUTHWEST NORTH ATLC S OF 31N W OF 55W. LARGE MID LEVEL CYCLONIC CIRCULATION NEAR 42N42W CONTINUES TO SEND WEAK SHORTWAVES S INTO OUR REGION S OF 31N..THUS WEAKENING THE MID LEVEL RIDGE. AN INVERTED TROUGH EXTENDS FROM THE NC COAST SSW TO S FL..OTHERWISE A MID LEVEL RIDGE COVERS THE SRN CONUS AND NE OFF THE NE COAST. ON THE SURFACE TONIGHT T.S. GABRIELLE IS N OF THE AREA APPROACHING THE NC COAST. SOME WINDS TO 20 KT STILL OCCURING N OF 30N W OF 73W. WEAK TRPL WAVES ALONG 54W AND 88W MOVING W 10 TO 15 KT. LATER DAY 1 LITTLE CHANGE TO MID LEVEL PATTERN WITH A BUBBLE OF HIGH PRES STATIONARY NEAR 30N68W. INVERTED TROUGH FROM CAR COAST SW TO SE GULF. ON THE SURFACE LATER DAY 1 TRPL WAVE APPROACHES LESSER ANTILLES WHILE GFS MODEL PICKS UP ON WEAK LOW NEAR 10N34W. WEAKENING COLD FRONT OVER NE SECTOR OF AREA WITH WINDS TO 20 KT. CARIB WINDS MODERATE OVER CENTRAL SECTION WHILE GULF MOSTLY LIGHT. FOR DAY 2 MID LEVEL CUTOFF LOW REMAINS STATIONARY NEAR 42N42W BUT STRONG WESTERLIES SETTING UP TO W ALONG NRN CONUS WITH A SHORTWAVE DIVING SE INTO THE UPPER PLAINS. MID LEVEL RIDGING HOLDS FIRM OVER SE CONUS FOR NOW. ON THE SURFACE DAY 2 WEAK WAVE OVER ERN CARIB WITH WINDS OF 20 KT. GULF REMAINS QUIET WITH A WEAK WAVE CENTRAL SECTION. FRONT OVER NE SECTOR WITH WINDS TO 20 KT. 1021 MB BUBBLE NEAR 31N62W WITH RIDGE TO N FL. OUTLOOK PERIOD... FOR DAY 3 STRONG SHORTWAVE DIVING SE OVER GREATLAKES BEGINS TO WEAKEN RIDGE OVER SE CONUS. OLD CUTOFF DRIFTING E TO 41N40W WITH TROUGH SSW TO 27N50W. ON THE SURFACE DAY 3 TROUGH SUPPORTS WEAK FRONT OVER NE SECTION BUT WINDS MOSTLY LIGHT. 1021 MB HIGH NEAR 30N62W WITH RIDGE TO CENTRAL FL AND GULF. WEAK LOW IN TROPICS NEAR 13N38W. CARIB WINDS MOSTLY MODERATE. FOR DAY 4 STRONG SHORTWAVE MOVES QUICKLY EWD WHILE ADDITIONAL WEAKER WAVES MOVE INTO CENTRAL MS VALLEY. MID LEVEL RIDGE HOLDS ON NEAR 30N70W BUT MID LEVEL HEIGHTS SLOWLY FALLING OVER NW GULF. MID LEVEL TROUGHING OVER MID ATLC WEAKENING AS CUTOFF LOW LIFTS NE. ON THE SURFACE DAY 4 GULF WINDS REMAIN LIGHT UNDER WEAK PRES GRADIENT. 1021 MB HIGH NEAR 30N60W WITH WEAK RIDGE TO N CENTRAL FL. WEAK ATLC LOW NEAR 13N43W. CARIB WINDS MOSTLY MODERATE E OF 80W. FOR DAY 5 WESTERLIES REMAIN N OF 35N OVER CONUS MAINLY DUE TO LACK OF COLD AIR FURTHER N. STRONG ZONAL MID LEVEL FLOW STILL TRYING TO CARVE OUT A TROUGH ALONG 98W BUT MID LEVEL RIDGE HOLDS FIRM NEAR 30N70W. ON THE SURFACE DAY 5 1021 MB HIGH NEAR 31N66W WITH RIDGE TO N FL AND N CENTRAL GULF. WEAK LOW OVER TRPL ATLC NEAR 16N45W WITH WINDS OVER N QUADRANT TO 25 KT..COULD BE NEXT TRPL SYSTEM. CARIB TRADES INCREASE SOME TO 25 KT OVER CENTRAL SECTION. WARNINGS... ATLANTIC... NONE. CARIBBEAN... NONE. GULF OF MEXICO... NONE. FORECASTER RRG