000 AXPZ20 KNHC 291008 RRA TWDEP TROPICAL WEATHER DISCUSSION NWS NATIONAL HURRICANE CENTER MIAMI FL 1005 UTC SUN NOV 29 2015 TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM THE EQUATOR TO 32N...EAST OF 140W. THE FOLLOWING INFORMATION IS BASED ON SATELLITE IMAGERY...WEATHER OBSERVATIONS...RADAR...AND METEOROLOGICAL ANALYSIS. BASED ON 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 0930 UTC. ...SPECIAL FEATURES... GULF OF TEHUANTEPEC GALE WARNING...A HIGH PRESSURE RIDGE EXTENDING FROM THE SOUTHEASTERN U.S. TO THE YUCATAN PENINSULA IS COMBINING WITH A SHARP AND HIGH AMPLITUDE TROUGH ACROSS THE ATLANTIC FROM JUST WEST OF BERMUDA TO HISPANIOLA...WHICH IS PROMOTING FRESH N TO NE WINDS ACROSS THE W CARIBBEAN AND INTO CENTRAL AMERICA. THIS ALIGNMENT AND THE ASSOCIATED PRESSURE GRADIENT SUPPORT FRESH TO STRONG GAP WINDS ACROSS SEVERAL GAP PRONE AREAS OF PACIFIC CENTRAL AMERICA...AND NORTHERLY GALE FORCE WINDS ACROSS THE GULF OF TEHUANTEPEC AND DOWNSTREAM TO NEAR 14.5N95W. GALE WINDS ARE EXPECTED TO CONTINUE FOR NEARLY 36 HOURS OR THROUGH MON NIGHT. WINDS THERE MAY PEAK NEAR 40 KT SUNDAY NIGHT...WITH MAXIMUM SEAS BUILDING 12-14 FT. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... THE MONSOON TROUGH EXTENDS FROM 05N77W TO 04N88W WHERE THE ITCZ BEGINS AND CONTINUES ALONG 05N101W TO 07N111W. THE ITCZ THEN RESUMES NEAR 11N114W TO 09N121W TO 06N130W TO 01N140W. NUMEROUS MODERATE TO ISOLATED STRONG CONVECTION IS FROM 07N TO 13N BETWEEN 110W AND 115W. SCATTERED MODERATE TO ISOLATED STRONG CONVECTION IS FROM 05N TO 08N BETWEEN 124W AND 134W. ...DISCUSSION... THE REMNANT LOW OF SANDRA WAS POSITIONED AT 23.5N107.9W NEAR 0600 UTC WITH A PRESSURE OF 1008 MB. THE LOW WILL MOVE NE TODAY AND IS EXPECTED TO MEANDER NEAR THE COAST OF CENTRAL SINALOA BEFORE DISSIPATING. LOOK FOR MARINE CONDITIONS ACROSS THE SOUTHERN GULF OF CALIFORNIA TO GRADUALLY IMPROVE DURING THIS TIME...BUT WILL IMMEDIATELY BE REPLACED BY N-NW WINDS OF 20-25 KT SPILLING DOWN THE ENTIRE LENGTH OF THE GULF OF CALIFORNIA SUN AFTERNOON AND NIGHT...AND CONTINUE THROUGH TUE...WITH SEAS BUILDING TO 9 FT ACROSS S PORTIONS. A WEAKENING COLD FRONT STRETCHES FROM LOW PRES N OF THE AREA NEAR 33N124W TO 28N126W TO 28N132W. A STRONGER COLD FRONT IS TO THE NW N OF THE AREA. A BROAD RIDGE PREVAILS OVER NORTHERN WATERS N OF 24N W OF 122W. THE PRESSURE GRADIENT BETWEEN THE RIDGE AND ITCZ IS SUPPORTING AN ELONGATED AREA OF 20-25 KT NE WINDS FROM 08N TO 20N W OF 118W...WHICH IS PRODUCING A LARGE AREA OF 9-12 FT SEAS FROM SWELL GENERATED BY SANDRA...NW SWELL SWEEPING INTO THE AREA FROM THE CENTRAL PACIFIC. THIS AREA OF STRONG NE TRADES IS EXPECTED TO SHIFT WEST-SOUTHWESTWARD AS RIDGING BUILDS SOUTHEASTWARD ACROSS THE NORTHERN FORECAST WATERS THROUGH TODAY. A NEW COLD FRONT WILL ENTER THE NW FORECAST WATERS MONDAY MORNING WITH NW SWELL W OF THE BOUNDARY RAISING SEAS 10 TO 13 FT. THREE LOW LEVEL PERTURBATIONS HAVE DEVELOPED ALONG THE ITCZ BETWEEN 110W AND 135W AND ARE SHIFTING SLOWLY W...AND PRODUCING A SIGNIFICANT AREA OF CONVECTION DESCRIBED ABOVE. OTHERWISE... STABLE ATMOSPHERIC CONDITIONS AND GENERALLY SINKING MOTION PREVAIL ACROSS THE TROPICAL EASTERN N PACIFIC. GAP WINDS... AS MENTIONED ABOVE...THE PRESSURE PATTERN ACROSS THE W ATLANTIC...GULF OF MEXICO...AND WESTERN CARIBBEAN HAS SET UP TO PRODUCE IDEAL CONDITIONS FOR NORTHEAST WINDS TO BLOW ACROSS CENTRAL AMERICA AND THROUGH THE GAP WIND PRONE AREAS ALONG THE PACIFIC COASTS. THE GULF OF PAPAGAYO REGION IS EXPECTED TO PULSE TO 20-25 KT EACH EVENING THROUGH MORNING THROUGH MON. MEANWHILE LOOK FOR THE GULF OF FONSECA TO BLOW TO AROUND 20 KT EACH OF THE NEXT NIGHT AND MORNINGS...WHILE NORTHERLY WINDS SPILL ACROSS PANAMA AND PRODUCE N WINDS AROUND 20 KT ACROSS AND DOWNSTREAM OF THE GULF OF PANAMA. $$ NR