000 AXPZ20 KNHC 260330 TWDEP TROPICAL WEATHER DISCUSSION NWS NATIONAL HURRICANE CENTER MIAMI FL 0405 UTC THU DEC 26 2013 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 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 0300 UTC. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... MONSOON TROUGH FROM 06N77W TO 07N88W. ITCZ FROM 07N88W TO 06N101W TO 12N135W TO 11N140W. SCATTERED MODERATE ISOLATED STRONG CONVECTION WITHIN 60 NM N OF ITCZ BETWEEN 126W AND 135W. ...DISCUSSION... WEAK RIDGE OF HIGH PRESSURE EXTENDS SE FROM 40N135W TO 23N116W. A SURFACE TROUGH IS ALONG THE W COAST OF MEXICO FROM 19N105W TO 32N112W. LARGE SCALE UPPER LEVEL DIVERGENCE E OF A CUT-OFF UPPER LOW CENTERED NEAR 16N148W IS PRODUCING AN EXTENSIVE PLUME OF DEEP LAYER MOISTURE EVIDENCED BY BROAD CIRROSTRATUS CLOUD SHIELD AND EMBEDDED LIGHT TO MODERATE SHOWERS OVER A LARGE PART OF THE DISCUSSION AREA W OF 130W. DEEP CONVECTIVE SHOWERS ARE LOCATED NEAR THE ITCZ AXIS NEAR 13N134W. SCATTEROMETER DATA SHOWED LARGE AREA OF FRESH E-NE TRADES FROM 12N-20N W OF 130W. HIGHEST WINDS DEPICTED BY ASCAT NEAR 16N134W WERE RAIN CONTAMINATED. ASCAT SCATTEROMETER PASSING DIRECTLY OVER GULF OF TEHUANTEPEC BETWEEN 1530 AND 1630 UTC INDICATED MAX WINDS IN THE REGION WERE AROUND 30 KT. WINDS AND SEAS WILL CONTINUE TO DIMINISH THE REST OF TODAY IMMEDIATELY DOWNSTREAM FROM THE GULF...WHILE A LARGE AREA OF 8-10 FT NE SWELL GENERATED BY GALES THE PAST 24-36 HOURS WILL SPREAD AND EXPAND EASTWARD TO AROUND 110W THIS MORNING. LOOKING AHEAD...MARINE GUIDANCE SUGGESTS PEAK WINDS APPROACHING MINIMAL GALE FORCE ONCE AGAIN IN THE GULF OF TEHUANTEPEC N OF 15N EARLY SAT MORNING. LONG PERIOD NW SWELL MOVING INTO NW PORTION WILL SPREAD SE AND AFFECT MOST OF THE WATERS W OF 110W BY FRI. EXPECT SEAS BUILDING TO 11 FT ACROSS NW WATERS TONIGHT THROUGH FRI NIGHT. $$ MUNDELL