000 AXPZ20 KNHC 141515 TWDEP TROPICAL WEATHER DISCUSSION NWS NATIONAL HURRICANE CENTER MIAMI FL 1605 UTC SUN DEC 14 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 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 1500 UTC. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... THE MONSOON TROUGH AXIS EXTENDS FROM 09N83W TO LOW PRES NEAR 08N85W TO 05N91W. THE ITCZ AXIS EXTENDS FROM 05N91W TO 08N108W THEN RESUMES FROM 07N120W TO 06N140W. SCATTERED MODERATE CONVECTION IS WITHIN 150 NM SE OF THE AXIS BETWEEN 82W AND 86W. SCATTERED MODERATE AND ISOLATED STRONG CONVECTION IS WITHIN 75 NM EITHER SIDE OF THE AXIS W OF 133W. ...DISCUSSION... A COLD FRONT ORIGINATING FROM JUST W OF BRITISH COLUMBIA EXTENDS INTO THE DISCUSSION WATERS FROM 30N135W TO 26N140W. SCATTEROMETER DATA SHOWED FRESH TO STRONG SW WINDS N OF 29N JUST AHEAD OF THE FRONT...AND FRESH TO STRONG NW WINDS N OF 29N W OF THE FRONT. LARGE NW SWELL OF 10-18 FT IS MOVING IN BEHIND THE FRONT WHILE SEAS OF 8 FT OR GREATER EXTEND ALL THE WAY SE TO A LINE FROM 23N110W TO 10N99W TO 03.4S110W. THESE SEAS ARE MAINLY DUE TO AN OLDER SET OF NW SWELL WHICH ARRIVED BEHIND THE PREVIOUS COLD FRONT. THE FRONT WILL SWEEP EASTWARD AND REACH FROM 30N127W TO 24N135W BY 24 HOURS...THEN WILL BEGIN TO DISSIPATE AS IT STRETCHES FROM 30N119W TO 25N125W BY 48 HOURS. THE ASSOCIATED NW SWELL WILL CONTINUE TO PROPAGATE TO THE SE WHILE THE OLD AREA OF NW SWELL CURRENTLY WELL OUT AHEAD OF THIS NEW FRONT DECAYS. EAST OF THE COLD FRONT...1020 MB HIGH PRESSURE IS LOCATED NEAR 30N123W WITH A WEAK RIDGE EXTENDING TO THE SE TO NEAR 19N113W... AND ALSO SW TO NEAR 25N136W AHEAD OF THE COLD FRONT. AN EARLIER ASCAT SCATTEROMETER PASS INDICATED NW 15-20 KT WINDS ALONG THE WESTERN COAST OF BAJA CALIFORNIA NORTE. GENERALLY LIGHT TO MODERATE WINDS PERSIST IN THE AREA OF THE HIGH PRES N OF 20N E OF 130W. THE HIGH PRES IS MAINTAINING MAINLY MODERATE TRADE WINDS S OF 20N AS WELL. A PAIR OF WEAK TROUGHS ARE NOTED ALONG THE ITCZ BETWEEN 110W AND 120W. SCATTERED MODERATE CONVECTION IS FROM 07N TO 11N BETWEEN 106W AND 115W. WEAK 1010 MB LOW PRESSURE IS EMBEDDED IN THE MONSOON TROUGH NEAR 08N85W. THIS LOW WILL REMAIN NEARLY STATIONARY THROUGH THE NEXT 24-48 HOURS WITH LITTLE CHANGE. GULF OF CALIFORNIA...LIGHT TO MODERATE NW-N WINDS AND SEAS 2 FT OR LESS PREVAIL. WINDS WILL BECOME VARIABLE N OF 28N MON NIGHT INTO EARLY TUE. GULF OF TEHUANTEPEC...A LATE NIGHT RAPIDSCAT SCATTEROMETER PASS SAMPLED A SMALL AREA OF FRESH TO STRONG NORTHERLY WINDS IN THE IMMEDIATE GULF...MAINLY DUE TO LOCAL DRAINAGE EFFECTS...WITH SEAS UP TO 7 FT. WINDS WILL DIMINISH TO GENTLE TO MODERATE LATER TODAY THROUGH 48 HOURS WITH SEAS SUBSIDING TO 2-4 FT BY MON MORNING THROUGH TUE MORNING. GULF OF PAPAGAYO...WINDS WILL CONTINUE TO PULSE TO MODERATE TO FRESH LEVELS DURING THE LATE NIGHT AND EARLY MORNING HOURS DURING NOCTURNAL DRAINAGE FLOW. SEAS WILL REMAIN LESS THAN 8 FT. $$ LEWITSKY