000
AGXX40 KNHC 200629
MIMATS

MARINE WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
13 AM EST SUN JAN 20 2008
 
MARINE WEATHER DISCUSSION FOR GULF OF MEXICO...CARIBBEAN SEA AND 
SOUTHWEST NORTH ATLC S OF 31N W OF 55W.

MID LEVEL HIGH PRES ASSERTING ITSELF TONIGHT OVER THE REGION. 
THE HIGH CENTER IS NEAR 25N65W BUT COVERS THE ENTIRE SW AND 
CENTRAL ATLC. STRONG UPPER TROUGH SWINGING E T0WARD MID ATLC 
REGION TONIGHT WITH CONVERGING NW AND SW MID LEVEL WINDS OVER SE 
CONUS. ON THE SURFACE TONIGHT VERY COLD POLAR OR POSSIBLY ARCTIC 
AIRMASS HAS SPILLED S OVER GULF WITH A COLD FRONT OVER CENTRAL 
FL MOVING SE. GALE CONDITIONS OVER GULF WILL DROP BELOW GALE 
FORCE EARLY SUN. ATLC RIDGE NEAR 30N50W WITH 20 TO 25 KT WINDS 
OVER ATLC S OF 23N AND CARIB. 

LATER DAY 1 UPPER TROUGH MOVES OVER NEW ENGLAND WITH MID LEVEL 
FLOW BECOMING NW AND W W OF 80W. MID LEVEL RIDGE REMAINS 
STATIONARY. ON THE SURFACE LATER DAY 1 COLD FRONT MOVES INTO WRN 
BAHAMAS WITH NLY WINDS TO 25 KT. LITTLE CHANGE ELSEWHERE.

FOR DAY 2 STRONG WLY MID LEVEL FLOW N OF 25N. MID LEVEL RIDGE 
REMAINS IN PLACE BUT PORTION N OF 30N ERODED BY STRONG 
WESTERLIES. STRONG CUTOFF LOW OVER ERN ATLC ALONG 30W TRYING TO 
WORK IT'S WAY WWD. ON THE SURFACE DAY 2 GRADIENT TIGHTENING E OF 
40W WITH NLY WINDS INCREASING TO 25 KT AND SEAS BUILDING TO 12 
FT. OLD COLD FRONT OVER ATLC BUT LOSING IDENTITY. POLAR AIRMASS 
MOVING OFF SE COAST MAINTAINS WINDS 20 TO 30 KT OVER ATLC INTO 
CARIB AND GULF. 

OUTLOOK PERIOD...

FOR DAY 3 STRONG ZONAL FLOW N OF 25N WITH NEXT SHORTWAVE 
DROPPING SE OVER MIDWEST. ON THE SURFACE DAY 3 PRES GRADIENT 
RELAXES OVER GULF AND WINDS BECOME LIGHT. NEXT COLD FRONT OVER 
TX MOVING SE. CARIB WINDS DIMINISH TO 20 KT AS DO ATLC TRADES. 
OLD POLAR AIRMASS MOVES TO 60W. STILL HAVE PROBLEM E OF 40W WITH 
LOW NEAR 27N34N. 

FOR DAY 4 NEW SURGE OF COLD AIR ALOFT DROPS S OVER UPPER PLAINS 
WILL TIGHTEN THE MID LEVEL GRADIENT OVER THE ERN CONUS. ON THE 
SURFACE DAY 4 TX COLD FRONT MOVES INTO N GULF WITH 15 KT BUT 
MOSTLY MOVING EWD WITH STRONG ZONAL FLOW ALOFT. MODERATE WINDS N 
OF 28N OVER ATLC AND OVER CARIB AND ATLC S OF 20N. WINDS 
DECREASE E OF 40W AS LOW WEAKENS. 

FOR DAY 5 STRONG SHORTWAVE MOVES SE TOWARD MID ATLC COAST WITH 
STRONG JET STREAM PENETRATING SE CONUS. ON THE SURFACE DAY 5 A 
1034 MB POLAR HIGH MOVES TO NE TX AND WINDS INCREASE OVER THE N 
GULF TO 25 KT. WINDS ALSO INCREASE OVER ATLC WATERS N OF 29N W 
OF 65W AS LOW PRES DEVELOPS OFF SE COAST. CARIB WINDS MODERATE E 
OF 80W. ATLC WINDS LIGHT TO MODERATE MOST SECTIONS. 

WARNINGS...
ATLANTIC...
NONE.

CARIBBEAN...
NONE.

GULF OF MEXICO...
NONE.

FORECASTER RRG