000 AXPZ20 KNHC 190930 TWDEP TROPICAL WEATHER DISCUSSION NWS NATIONAL HURRICANE CENTER MIAMI FL 1005 UTC THU APR 19 2012 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 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 0900 UTC. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... THE MONSOON TROUGH IS ALONG 09N79W TO 04N94W. THE INTERTROPICAL CONVERGENCE ZONE AXIS EXTENDS FROM 04N94W TO 06N111W THEN RESUMES FROM 05N123W TO 04N130W TO 04N140W. SCATTERED MODERATE AND ISOLATED STRONG CONVECTION IS WITHIN 120 NM W OF A LINE FROM 10N108W TO 06N112W. SCATTERED MODERATE CONVECTION IS WITHIN 90-150 NM S OF THE ITCZ W OF 134W. ...DISCUSSION... NEARLY STATIONARY 1026 MB SURFACE HIGH PRES IS POSITIONED NEAR 29N137W WITH AN ATTENDANT RIDGE EXTENDING FROM THE HIGH CENTER SE TO NEAR 17N116W. FRESH NORTHERLY WINDS EXTENDING SOUTHWARD FROM OFF THE COAST OF SOUTHERN CALIFORNIA TO THE WATERS N OF 27N BETWEEN 118W AND 122W WILL PERSIST THROUGH FRI...DIMINISHING BY FRI NIGHT. AN AREA OF FRESH NE-E TRADES COVERS THE WATERS FROM 06N TO 23N W OF 130W AND FROM 08N TO 15N BETWEEN 124W AND 130W. THESE WINDS WILL GRADUALLY CONTRACT THROUGH THE NEXT 48 HOURS...COVERING ONLY A SMALL AREA FROM 05N TO 10N W OF 134W BY FRI NIGHT. LONG PERIOD NW SWELL OF 8-9 FT OVER THE SW HALF OF THE DISCUSSION WATERS WILL DECAY TO LESS THAN 8 FT BETWEEN 24-48 HOURS. LOOKING AHEAD...MODEL GUIDANCE BRINGS A COLD FRONT INTO THE FAR NW PORTION OF THE WATERS THIS WEEKEND WITH FRESH WINDS AND A NEW SET OF NW SWELL EXPECTED BEHIND IT. GAP WINDS...NORTHERLY 20-30 KT WINDS ARE FUNNELING SOUTHWARD FROM THE CHIVELA PASS TO ACROSS THE GULF OF TEHUANTEPEC...AS CONFIRMED BY A RECENT ASCAT SCATTEROMETER PASS. THESE WINDS WILL GRADUALLY DIMINISH TO LESS THAN 20 KT LATER TODAY...ALTHOUGH SWELL OF 8 FT GENERATED BY THE EVENT WILL LINGER THROUGH EARLY FRI AFTERNOON. $$ LEWITSKY