000 AXPZ20 KNHC 010341 TWDEP TROPICAL WEATHER DISCUSSION NWS NATIONAL HURRICANE CENTER MIAMI FL 0405 UTC TUE MAR 01 2015 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 0315 UTC. ...INTERTROPICAL CONVERGENCE ZONE... A SURFACE TROUGH EXTENDS FROM 09N83W TO 06N90W....THEN TRANSITIONS TO THE ITCZ NEAR 06N90W AND CONTINUES THROUGH 02N110W TO 01N120W TO 02N140W. WIDELY SCATTERED MODERATE CONVECTION WAS NOTED WITHIN 120 NM N OF ITCZ W OF 136W. ...DISCUSSION... WEAKENING 1022 MB HIGH PRESSURE CENTERED JUST N OF THE AREA NEAR 33N128W EXTENDS A RIDGE SE TO NEAR 15N105W AND SW TO BEYOND 23N140W. THE PRESSURE GRADIENT BETWEEN THE AREA OF HIGH PRESSURE AND LOWER PRESSURE IN THE VICINITY OF THE ITCZ IS MAINTAINING MODERATE TO LOCALLY FRESH TRADES OVER THE WESTERN WATERS N OF THE ITCZ. TRADES WILL REMAIN IN THE MODERATE TO FRESH RANGE THROUGH THE NEXT COUPLE OF DAYS. SUBSIDING NW SWELL MIXING WITH SOUTHERLY SWELL IS COVERING MUCH OF THE FORECAST AREA WITH SEAS GREATER THAN 8 FT FOUND GENERALLY W OF 100W. THIS SWELL WILL CONTINUE TO SUBSIDE OVER THE NEXT COUPLE OF DAYS AND BY LATE WED SEAS OF 8 FT OR GREATER WILL SHRINK TO AN AREA FROM 04N TO 10N GENERALLY W OF 130W...BECOMING ABSORBED INTO A NEW ROUND OF SWELL GENERATED BY THE COLD FRONT DESCRIBED BELOW. A COLD FRONT WILL MOVE INTO THE FAR NW WATERS BEFORE SUNRISE WED WITH STRONG TO NEAR GALE FORCE WINDS OCCURRING ALONG AND WITHIN 120 NM E OF THE FRONT. THE FRONT WILL USHER IN A FRESH SET OF NW SWELLS INTO THE AREA WITH SEAS BUILDING TO NEAR 20 FT BY LATE WED. GAP WINDS... A 2318 UTC RAPIDSCAT SCATTEROMETER PASS INDICATED THE GAP WIND EVENT OF THE PAST FEW DAYS HAS ENDED. AN EARLIER ASCAT PASS SHOWED AN AREA OF LINGERING 20 TO 25 KT WINDS WITHIN 45 NM OF A LINE FROM NEAR THE GULF OF PAPAGAYO TO 10N90W. THE GAP WINDS WILL PULSE OVER THE GULF OF TEHUANTEPEC AND GULF OF PAPAGAYO OVER THE NEXT 24 HOURS OR SO WITH PEAK VALUES OF 25 KT DURING THE LATE NIGHT AND EARLY MORNING HOURS WITH THE ASSISTANCE OF NOCTURNAL DRAINAGE FLOW. AFTER 36 HOURS...GAP WIND FLOW BECOMES MORE STEADY OVER THE GULF OF TEHUANTEPEC WITH NORTHERLY WINDS INCREASING TO 20 TO 30 KT AND SEAS BUILDING 8 TO 10 FT. THERE IS A POSSIBILITY WINDS MAY REACH GALE FORCE WED NIGHT INTO THU. HOWEVER THIS EVENT IS EXPECTED TO BE SHORT-LIVED. $$ COBB