000 AXPZ20 KNHC 040932 TWDEP TROPICAL WEATHER DISCUSSION NWS NATIONAL HURRICANE CENTER MIAMI FL 1005 UTC SAT APR 04 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 0900 UTC. ...SPECIAL FEATURES... GULF OF TEHUANTEPEC GALE WARNING...HIGH PRESSURE EXTENDING SOUTHWARD FROM THE SOUTH-CENTRAL U.S. ALONG THE MEXICO COASTAL PLAINS TO SE MEXICO WILL PRODUCE A TIGHT PRESSURE INTO THE GULF OF TEHUANTEPEC. THIS WILL SUPPORT NORTHERLY WINDS OF 20 TO 25 KT STARTING EARLY THIS MORNING. THE NORTHERLY WINDS WILL GRADUALLY INCREASE THROUGHOUT THE DAY ON SAT REACHING 30-35 KT MINIMAL GALE FORCE ON SAT EVENING. THE GALE WILL PERSIST THROUGH SUN MORNING WITH SEAS BUILDING TO 13 FT. THEN...THE WINDS WILL DIMINISH BELOW GALE FORCE ON SUN AFTERNOON. EXPECT NORTHERLY WINDS OF 20-25 KT SUN NIGHT INTO EARLY MON MORNING. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... THE ITCZ AXIS EXTENDS FROM 07N100W TO 05N120W TO 04N140W. SCATTERED MODERATE CONVECTION IS NOTED FROM 06N TO 08N BETWEEN 100W AND 108W. SIMILAR CONVECTION IS WITHIN 90 NM N OF AXIS BETWEEN 113W AND 115W AND FROM 01N TO 03N BETWEEN 120W AND 126W. A SOUTHERN HEMISPHERE ITCZ IS ANALYZED FROM 01S83W TO 02S88W TO 01S93W. A CLUSTER OF MODERATE CONVECTION IS S OF 02.5S BETWEEN 86W AND 87W. ...DISCUSSION... A 1033 MB HIGH PRESSURE CENTER LOCATED NW OF THE AREA NEAR 37N145W EXTENDS A RIDGE TO THE SE TO NEAR 20N110W JUST S OF THE SOUTHERN TIP OF THE BAJA CALIFORNIA PENINSULA. THE HIGH PRESSURE RIDGING COMBINED WITH LOWER PRESSURE NEAR THE ITCZ IS SUPPORTING AN AREA OF FRESH TO STRONG TRADE WINDS ACROSS THE WEST-CENTRAL WATERS...PARTICULARLY FROM 08N TO 21N W OF 132W. AN ALTIMETER PASS INDICATED SEAS UP TO 10 FT IN THIS AREA. THE LONG PERIOD NW SWELL ALREADY IN PLACE COMBINED WITH THE NE WIND WAVES WILL MAINTAIN AN AREA OF 8-9 FT SEAS ACROSS THE WEST-CENTRAL WATERS WHICH WILL PERSIST THROUGH AT LEAST SUN MORNING. THE HIGH PRES WILL BE REINFORCED BY A STRONGER HIGH PRES TODAY KEEPING THE AREA OF FRESH TO STRONG TRADES ESPECIALLY ACROSS THE WATERS FROM 10N TO 20N W OF 130W OVER THE NEXT COUPLE OF DAYS. FRESH TO STRONG WINDS NORTH OF THE AREA AND NEAR THE COAST OF CALIFORNIA WILL CONTINUE TO GENERATE FRESH NORTHERLY SWELLS WHICH ARE PROPAGATE SOUTHWARD INTO THE NORTHERN FORECAST WATERS MAINLY N OF 27N BETWEEN 120W AND 130W WITH SEA HEIGHTS OF 8-9 FT. ADDITIONAL PULSES OF LONG PERIOD NW SWELL ARE REACHING THE FAR NW CORNER OF THE AREA AND WILL CONTINUE TO SPREAD ACROSS THE N WATERS ON SUN. E OF 110W...MAINLY LIGHT TO GENTLE WINDS ARE SEEN BASED ON SCATTEROMETER DATA WITH THE EXCEPTION OF THE GAP WIND REGIONS OF TEHUANTEPEC...PAPAGAYO AND PANAMA. GAP WINDS... GULF OF PAPAGAYO...PULSING OF NOCTURNAL WINDS ARE EXPECTED IN THE GULF OF PAPAGAYO EARLY THIS MORNING...REACHING 20-25 KT... WITH COMBINED SEAS OF 6-7 FT DOWNWIND OF THE GULF. A STRONGER GAP WIND EVENT IS EXPECTED ACROSS THIS GULF ON SUN...WITH WINDS OF 25 KT EXTENDING SW AND DOWNWIND TO NEAR 92W WITH BUILDING SEAS TO 9 FT. THIS WILL BE ASSOCIATED WITH A HIGH PRES BUILDING ACROSS THE NW CARIBBEAN AND NORTHERN CENTRAL AMERICA. THESE MARINE CONDITIONS WILL PERSIST ON MON...WITH THE FRESH TO STRONG NE-E WINDS EXTENDING FARTHER WEST TO NEAR 93W-94W WITH BUILDING SEAS TO 9 FT. GULF OF PANAMA...MODERATE TO FRESH NORTHERLY WINDS ARE EXPECTED ACROSS THE GULF OF PANAMA AND DOWNWIND TO ABOUT 06N OVER THE NEXT COUPLE OF DAYS WITH BUILDING SEAS OF 5-7 FT. $$ GR