000 AGXX40 KNHC 210608 MIMATS MARINE WEATHER DISCUSSION NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 130 AM EST THU DEC 21 2006 MARINE WEATHER DISCUSSION FOR GULF OF MEXICO...CARIBBEAN SEA AND SOUTHWEST NORTH ATLC S OF 31N W OF 55W. A LARGE MID LEVEL RIDGE CENTERED ALONG 80W IS BEING PUSHED EWD BY A STRONG CLOSED LOW OVER THE CENTRAL PLAINS. FURTHER E A STRONG SHORTWAVE TROUGH ALONG 50W IS MOVING EWD. ON THE SURFACE TONIGHT AN OLD COLD FRONT EXTENDED FROM 31N53W TO 26N65W THEN STATIONARY TO NE FL. NE WINDS 20 TO 25 KT PREVAILED OVER THE ATLC W OF THE FRONT S OF 29N. S OF 20N MOSTLY ELY TRADES OF 20 KT OVER THE ATLC AND CARIB TONIGHT. SE WINDS TO 20 KT OVER THE GULF. LATER DAY 1 THE ERN ATLC SHORTWAVE BEGINS TO LIFT ENE WHILE A WEAKER SHORTWAVE MOVES SE TO 50W. THE MID LEVEL RIDGE CONTINUES EWD TO 70W AND THE CLOSED LOW MOVES SLOWLY OVER THE CENTRAL PLAINS. ON THE SURFACE LATER DAY 1 THE ATLC FRONT MOVES TO 31N42W TO 23N60W. WINDS W OF THE FRONT WEAKEN SLIGHTLY. CARIB WINDS REMAIN 20 KT. A WEAK FRONT MOVES TO ERN TX WITH SE WINDS OVER THE GULF REMAINING 15 TO 20 KT. FOR DAY 2 THE MID LEVEL RIDGE RE-ESTABLISHES ITSELF ALONG 70W AS THE CUTOFF LOW HEADS NE TOWARD THE GREATLAKES. THE WEAK SHORTWAVE OVER MID ATLC MOVES SE TO 45W AS RIDGING BUILDS OVER THE EXTREME ERN ATLC. ON THE SURFACE DAY 2 THE E ATLC FRONT BEGINS TO DISSIPATE. THE COLD FRONT OVER ERN TX MOVES TO THE CENTRAL GULF WITH WINDS TO 20 KT. HIGH PRES OVER THE ATLC NEAR 33N67W MAINTAINS E AND SE WINDS OF 20 KT BETWEEN 60W AND 85W. OUTLOOK PERIOD... FOR DAY 3 THE MID LEVEL RIDGE REFUSES TO BUDGE FROM 70W. A NEW SHORTWAVE TROUGH SHOWS UP IN THE SRN BRANCH OVER NE MEXICO LOWERING THE MID LEVEL HEIGHTS OVER THE WRN GULF. TROUGHING INCREASES ALONG 35W AS COLD AIR SPILLS S FROM THE NRN BRANCH OF THE WESTERLIES. ON THE SURFACE DAY 3 THE GULF FRONT WEAKENS AND PULLS UP STATIONARY OVER THE CENTRAL GULF. THE ATLC RIDGE MOVES E TO 53W INCREASING NE WINDS OVER THE ATLC W OF 45W. FOR DAY 4 STRONG SHORTWAVE TROUGH MOVES INTO THE NW GULF WHILE THE MID LEVEL RIDGE HOLDS ALONG 70W. TROUGHING CONTINUES TO DEEPEN ALONG 30W. ON THE SURFACE DAY 4 WEAK CYCLOGENESIS OVER THE WRN GULF MOVES NNE WITH A FAIRLY TIGHT GRADIENT N AND W OF THE CENTER THUS GALE CONDITIONS A POSSIBILITY. TRADES REMAIN FAIRLY STRONG OVER THE ATLC AND CARIB AS HIGH PRESSURE MOVES SLOWLY E. FOR DAY 5 A NEW SHORTWAVE TROUGH MOVES OUT OF THE CENTRAL ROCKIES AND KICKS THE WRN GULF SHORTWAVE NE OVER THE SE US. THE MID LEVEL RIDGE SHIFTS TO 65W WHILE TROUGHING HOLDS ALONG 30W. ON THE SURFACE DAY 5..CHRISTMAS DAY..A WEAK LOW MOVES TO NEAR 31N80W WITH A FRONT SSW TO THE YUCATAN CHANNEL. GUSTY WINDS 20 TO 30 KT DEVELOP OVER THE ATLC W OF 75W N OF 27N WHILE GULF WINDS DECREASE TO MOSTLY 15 TO 20 KT. ELY TRADES S OF 20N REMAIN BRISK AT 20 KT AND 20 TO 25 KT IN THE CARIB E OF 78W. WARNINGS... ATLANTIC... NONE. CARIBBEAN... NONE. GULF OF MEXICO... NONE..BUT GALE POSSIBLE DAY 4. FORECASTER RRG