000 AXPZ20 KNHC 260919 TWDEP TROPICAL WEATHER DISCUSSION NWS NATIONAL HURRICANE CENTER MIAMI FL 1005 UTC THU MAR 12 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 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 0900 UTC. ...SPECIAL FEATURES... HIGH PRES WILL BUILD BEHIND A COLD FRONT MOVING THROUGH THE GULF OF MEXICO. THIS WILL TIGHTEN THE PRES GRADIENT ACROSS SOUTHERN MEXICO RESULTING IN GALE FORCE WINDS THROUGH THE GULF OF TEHUANTEPEC THU EVENING. THE NLY WINDS WILL INCREASE TO 30-40 KT WITH SEAS BUILDING TO 17 FT THU NIGHT. WINDS WILL DECREASE TO BELOW GALE FORCE LATE SAT. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... MONSOON TROUGH FROM 1012 MB LOW NEAR 5N96W TO 5N113W. ITCZ FROM 5N113W TO 7N130W TO 6N140W. SCATTERED MODERATE TO STRONG CONVECTION WITHIN 360 NM N OF AXIS BETWEEN 122W-131W ...DISCUSSION... AN UPPER LEVEL TROUGH IS APPROACHING NW PORTION OF THE DISCUSSION AREA. AN UPPER LEVEL RIDGE EXTENDS FROM 32N128W TO 23N133W. AN EAST TO WEST UPPER LEVEL TROUGH WITH AXIS FROM NORTHERN MEXICO ACROSS NORTHERN BAJA CALIFORNIA TO 29N124W. A 75 TO 90 KT JETSTREAM IS S OF THE TROUGH FROM 22N125W TO 22N110W THEN INTO CENTRAL MEXICO. IN THE DEEP TROPICS AN UPPER LEVEL RIDGE EXTENDS FROM AN ANTICYCLONIC CIRCULATION NEAR 7N108W TO THE COAST OF MEXICO AT 16N98W. UPPER LEVEL TROUGH EXTENDS FROM GUATEMALA TO THE EQUATOR AT 95W. A SURFACE RIDGE IS N OF 15N W OF 115W. NW SWELL N OF 16N BETWEEN 116W-123W...WILL SUBSIDE TO LESS THAN 8 FT THU NIGHT. CROSS EQUATORIAL SW SWELL IS S OF 5N BETWEEN 95-120W WILL SPREAD NNE THE NEXT 24 HOURS...THEN SUBSIDE FRI NIGHT. A COLD FRONT WILL MOVE INTO THE NW PORTION OF THE AREA THU NIGHT EXTENDING FROM 32N134W TO 27N140W. NW SWELL WILL BUILD NW OF THE FRONT. $$ DGS