000 AXPZ20 KNHC 271601 TWDEP TROPICAL WEATHER DISCUSSION NWS NATIONAL HURRICANE CENTER MIAMI FL 1605 UTC THU JAN 27 2011 TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM THE EQUATOR TO 32N...EAST OF 140W. BASED ON 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 1500 UTC. ...ITCZ... AXIS IS CENTERED ALONG 05N77W TO 04N100W TO 09N135W TO 07N140W. ISOLATED MODERATE CONVECTION 02N TO 07N BETWEEN 77W AND 80W...AND FROM 04N TO 11N BETWEEN 103W AND 120W. SCATTERED MODERATE CONVECTION FROM 07N TO 10N BETWEEN 127W AND 130W. ...DISCUSSION... 1024 MB HIGH PRES IS W OF THE CALIFORNIA COAST NEAR 34N128W. A STATIONARY FRONT IS FURTHER SW...JUST W OF THE AREA...FROM 32N139W TO 28N144W TO 25N148W. THE FRONT IS EXPECTED TO DISSIPATE OVER THE NEXT 24 HOURS. SOME NW SWELL GENERATED BY WINDS ASSOCIATED WITH THE FRONT WILL MOVE INTO EXTREME NW PORTION OF AREA...BUILDING SEAS TO 10-11 FT TONIGHT AND FRI. OTHERWISE THE TREND OVER THE NEXT 24-48 HOURS WILL BE A GRADUAL DECREASE IN SEA HEIGHTS OVER THE ENTIRE BASIN. ONLY EXCEPTIONS TO THE OVERALL TREND ARE IMMEDIATE VICINITY OF LOCATIONS PRONE TO GAP WINDS...DISCUSSED BELOW...AND AN AREA OF ENHANCED TRADE WINDS EXPECTED TO DEVELOP BETWEEN 15N AND 21N W OF 135W FROM AN AMPLIFYING SURFACE TROUGH INDICATED THE GFS MODEL LATER TONIGHT. GAP WINDS... TIGHT PRES GRADIENT OVER SE MEXICO ASSOCIATED WITH HIGH PRES OVER THE NW GULF OF MEXICO IS PRODUCING N WINDS JUST BELOW GALE FORCE IN THE GULF OF TEHUANTEPEC AS A COLD AIR MASS SURGES SWD THROUGH THE CHIVELA PASS AS INDICATED BY SURFACE OBSERVATION REPORTS FROM STATION IXTEPEC. THE SURFACE GRADIENT WILL TIGHTEN IN 24 HOURS ALLOWING FOR GALE FORCE WINDS WINDS TO START FRI MORNING AND LAST FOR THE NEXT 24 HOURS. SEAS IN THE GULF OF TEHUANTEPEC ARE NOW 8 TO 10 FT. NE WINDS EXCEEDING 20 KT WILL BEGIN THROUGH THE GULF OF PAPAGAYO IN ABOUT 42 HOURS EARLY SAT MORNING AND CONTINUE THROUGH SUN. HIGH PRES OVER THE GREAT BASIN IN COMBINATION WITH LOWER PRES OVER NW MEXICO IS MAINTAINING NW WINDS TO 20 KT IN THE NORTHERN PORTION OF THE GULF OF CALIFORNIA. THESE WINDS ARE FORECAST TO CONTINUE AT 20-25 KT N OF 27N TODAY AND TONIGHT...THEN DIMINISH TO LESS THAN 20 KT EARLY FRI AS THE GRADIENT SLACKENS. $$ FORMOSA