000 AGXX40 KNHC 250610 MIMATS MARINE WEATHER DISCUSSION NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 130 AM EST TUE DEC 25 2007 MARINE WEATHER DISCUSSION FOR GULF OF MEXICO...CARIBBEAN SEA AND SOUTHWEST NORTH ATLC S OF 31N W OF 55W. MID LEVELS OVER REGION DOMINATED BY A STRONG BLOCKING RIDGE CENTERED NEAR 26N70W. RIDGE EXTENDS NE TO 40N40W. MID LEVEL TROUGH OVER ERN ATLC FROM 35N40W SW TO 15N60W. STRONG MID LEVEL TROUGH FROM OH VALLEY SW TO TX COAST. LATEST WATER VAPOR SHOWS TROUGH DIGGING SE WITH STRONG SUBTROPIC JET OVER NW GULF. ON THE SURFACE TONIGHT PESKY FRONT OVER CENTRAL ATLC WITH WEAK WAVES CONTINUES TO PRODUCE GALE CONDITION OVER ATLC WATERS WITHIN 300 NM N QUADRANT OF 25N50W LOW CENTER. LOW MOVING NE AND WEAKENING. STATIONARY FRONT FROM 31N75W TO SE FL WAITING FOR STRONG SHORTWAVE TO GIVE IT A PUSH EWD. LATER DAY 1 ERN ATLC MID LEVEL TROUGH CLOSING OFF NEAR 30N42W WHILE STRONG SHORTWAVE TROUGH OVER LOWER MS VALLEY CONTINUES ENE. BLOCKING RIDGE HOLDING FIRM OVER SE BAHAMAS. ON THE SURFACE LATER DAY 1 FRONTAL TROUGH OVER E CENTRAL ATLC DRIFTING EWD WITH WINDS DECREASING TO 20 TO 25 KT ON W SIDE. STATIONARY FRONT OVER FL DEVELOPING WAVE OF LOW PRES OVER NE GULF ASSOCIATED WITH STRONG SHORTWAVE. WINDS OVER N GULF COULD INCREASE TO NELY 20 KT. CARIB WINDS MOSTLY MODERATE E OF 80W AS IS ATLC TRADES S OF 15N. ATLC FROM 20N TO 26N BETWEEN 50W AND 70W 20 TO 25 KT. FOR DAY 2 LARGE BLOCKING MID LEVEL RIDGE HOLDING FIRM OVER NW CARIB TO 30N55W BUT WEAKENING. CLOSED MID LEVEL VORTEX NEAR 25N40W. STRONG SHORTWAVE MOVES ENE OFF DELMARVA WHILE NEW SHORTWAVE MOVES E INTO SRN PLAINS. ON THE SURFACE DAY 2 SURFACE LOW OVER E CENTRAL ATLC NEAR 28N40W MOVING NE WITH WINDS OF 20 KT. 1025 MB HIGH NEAR 31N57W WILL PRODUCE 20 KT WINDS OVER ATLC BETWEEN 45W AND 70W. FRONT MOVES E OF FL WITH WINDS TO 20 KT N OF 28N. RETURN FLOW SETS IN OVER WRN GULF AS NEXT COLD FRONT HEADS TOWARD TX COAST. OUTLOOK PERIOD... FOR DAY 3 BLOCKING MID LEVEL RIDGE FLATTENING OUT OVER REGION W OF 50W AS RELENTLESS STRONG WESTERLIES MOVE ENE OVER TOP OF RIDGE. MID LEVEL SHORTWAVES WEAKEN AS THEY EXIT THE E COAST WITH NEXT ONE MOVING INTO SRN PLAINS. ON THE SURFACE DAY 3 AREA OF NE WINDS OF 20 KT PERSISTS OVER E CENTRAL ATLC WHERE 1024 MB HIGH PUSHES AGAINST OLD FRONTAL TROUGH. MODERATE ELY WINDS ALL AREAS S OF 22N E OF 80W. RETURN FLOW OVER WRN GULF DECREASES SOME TO 15 KT. FOR DAY 4 BLOCKING MID LEVEL RIDGE FINDS NEW STRENGTH WHILE REMAINING STATIONARY OVER BAHAMAS. ERN ATLC TROUGH WEAKENING ALONG 35N30W SW TO 10N50W. STRONG SHORTWAVE OVER PLAINS MOVES RAPIDLY NE TOWARD OH VALLEY. ON THE SURFACE DAY 4 LARGE HIGH PRES N OF 26N WILL CONTINUE MODERATE NE AND E WINDS OVER REGION E OF 80W. NEW COLD FRONT MOVES OFF TX COAST WITH 20 KT WINDS. ONLY WEAK HIGH 1023 MB FOLLOWING FRONT. FOR DAY 5 BLOCKING MID LEVEL RIDGE HOLDS FIRM OVER BAHAMAS DIVERTING STRONG SWLY MID LEVEL FLOW TO N OF RIDGE. EMBEDDED SHORTWAVES THUS MOVING NE WITH LITTLE SUPPORT FOR FRONTS THAT PUSH OFF THE TX COAST. ON THE SURFACE DAY 5 COLD FRONT OVER NW GULF BECOMES STATIONARY WITH DECREASING WINDS. ATLC HIGH PRES DRIFTING E ALONG 35N WILL MAINTAIN MODERATE NE AND E WINDS OVER REGION S OF 25N E OF 80W. WARNINGS... ATLANTIC... GALE WRNG WITHIN 300 NM N QUADRANT OF LOW AT 25N50W TIL 12Z 25 DEC. CARIBBEAN... NONE. GULF OF MEXICO... NONE. FORECASTER RRG