000 AXPZ20 KNHC 220929 TWDEP TROPICAL WEATHER DISCUSSION NWS NATIONAL HURRICANE CENTER MIAMI FL 1005 UTC MON DEC 22 2014 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. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... THE MONSOON TROUGH AXIS EXTENDS FROM 04N77W TO 08N83W TO 06N103W. THE ITCZ AXIS EXTENDS FROM 06N103W TO 08N109W THEN RESUMES FROM 08N112W TO 05N140W. SCATTERED MODERATE CONVECTION IS FROM 06N TO 08.5N BETWEEN 107W AND 115W...AND ALSO FROM 06N TO 08N BETWEEN 134W AND 138W. ...DISCUSSION... A 1030 MB HIGH PRESSURE CENTER IS LOCATED JUST N OF THE AREA NEAR 34N132W WITH A RIDGE AXIS EXTENDING SE THROUGH 30N127W TO 15N103W. THE PRESSURE GRADIENT BETWEEN THE RIDGING AND LOWER PRESSURES ASSOCIATED WITH THE ITCZ TO THE S IS MAINTAINING A SMALL AREA OF 20-25 KT N WINDS ACROSS THE SUB-TROPICAL WATERS N OF 28N BETWEEN 119W AND 123W THROUGH TUE MORNING BEFORE DIMINISHING BELOW 20 KT. A WEAK SURFACE TROUGH EXTENDS FROM 13N109W TO 06N111W WITH SCATTERED MODERATE CONVECTION FROM 10N TO 13N BETWEEN 105W AND 112W. NE-E 15-20 KT TRADES ARE OBSERVED ACROSS THE TROPICS BETWEEN THE ITCZ AND THE RIDGE WITH AN AREA OF EMBEDDED 20-25 KT NE WINDS WITH SEAS OF 11-14 FT ACROSS THE WATERS FROM 07-18N W OF 127W. THE GRADIENT IS ALREADY RELAXING AND THE AREA OF 20-25 KT CONDITIONS WILL SHRINK THROUGH THE REST OF TODAY WITH WINDS DIMINISHING BELOW 20 KT ACROSS THE TROPICS BY 24 HOURS. OTHERWISE...LONG PERIOD NW SWELL WILL CONTINUE TO SPREAD E ACROSS THE DISCUSSION AREA W OF 100W WITH RESULTANT COMBINED SEAS OF 8-13 FT. THIS LONG PERIOD NW SWELL WILL GRADUALLY SUBSIDE THROUGH THE MIDDLE OF THE WEEK. EXPECT THE CURRENT 6-9 FT CONDITIONS ALONG THE PACIFIC COAST OF THE BAJA PENINSULA TO SUBSIDE TO 5-8 FT BY TONIGHT. GUIDANCE IS SUGGESTING NE WINDS WILL INCREASE TO 20-30 KT ALONG THE PACIFIC COAST OF THE BAJA PENINSULA NEAR 29N ON TUE...SPREADING SW TO NEAR 27N117W ON TUE NIGHT...THEN DIMINISHING TO 15 KT BY LATE WED. GULF OF CALIFORNIA...NW 15-20 KT NW WINDS WILL PERSIST THROUGH TONIGHT (MON NIGHT). THE GRADIENT WILL TIGHTEN EARLY TUE WITH THE NW FLOW INCREASING TO 20-25 KT ACROSS THE NORTHERN GULF WATERS TUE MORNING...WITH 20-30 KT CONDITIONS SPREADING S ACROSS THE ENTIRE GULF OF CALIFORNIA BY TUE EVENING. SEAS WILL BUILD TO UP TO 9 FT IN LONG FETCH WATERS NEAR 29N BY TUE EVENING. THE GRADIENT SHOULD RELAX ON WED WITH 15-20 KT FLOW ON WED NIGHT AND ONLY 10-15 KT NW FLOW ON THU EARLY THU. A COLD FRONT WILL APPROACH THE BAJA CALIFORNIA PENINSULA THU MORNING WITH WINDS BECOMING SOUTHERLY AND INCREASING TO 15-20 KT IN THE GULF N OF 29N BY THU AFTERNOON. THE FRONT WILL SWEEP ACROSS THE GULF LATE THU NIGHT THROUGH FRI WITH WINDS VEERING TO THE N BEHIND IT. GULF OF TEHUANTEPEC...EXPECTING A MAX OF 10-15 KT NOCTURNAL DRAINAGE FLOW ACROSS THE GULF OF TEHUANTEPEC FOR THE REST OF TONIGHT THROUGH EARLY MORNING...WITH LIGHT SOUTHERLY WINDS EXPECTED ON MON NIGHT...INCREASING TO MODERATE TUE NIGHT. MODEL GUIDANCE CONTINUES TO INDICATE WINDS RAPIDLY BECOMING NORTHERLY AT 20-30 KT WED AFTERNOON...THEN INCREASING TO STRONG GALE WED EVENING...FURTHER INCREASING TO NEAR STORM STRENGTH LATE WED NIGHT THROUGH THU MORNING. EXPECT THE GALE EVENT TO END BY FRI MORNING. GULF OF PAPAGAYO...NE 15-20 KT NOCTURNAL PULSES EXPECTED THROUGH EARLY TUE...THEN ONLY 10-15 KT DRAINAGE FLOW ON TUE NIGHT. GUIDANCE SUGGESTS BRIEF 15-20 KT CONDITIONS ON WED NIGHT...WITH A SIGNIFICANT EVENT OF 20-30 KT EVENT ON THU NIGHT INTO FRI WHICH WILL EXTEND AS FAR SW AS 08N94W LATE FRI. $$ LEWITSKY