000 AXPZ20 KNHC 212114 TWDEP TROPICAL WEATHER DISCUSSION NWS NATIONAL HURRICANE CENTER MIAMI FL 2205 UTC THU MAR 21 2013 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 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 2030 UTC. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... MONSOON TROUGH AXIS FROM 08N82W TO 04N100W TO 02N120W. ITCZ AXIS FROM 02N120W TO 01N140W. SCATTERED MODERATE ISOLATED STRONG FROM 04N TO 06N BETWEEN 83W AND 87W. CLUSTER OF MODERATE ISOLATED STRONG FROM 03N TO 06N BETWEEN 87W AND 90W. SIMILAR CONVECTION IS FROM 04N TO 07N BETWEEN 117W AND 126W. ...DISCUSSION... STRONG HIGH PRESSURE 1034 MB IS CENTERED WELL N OF THE AREA NEAR 41N135W WITH RIDGE EXTENDING SE TO NEAR 12N110W. THE PRESSURE GRADIENT BETWEEN THE HIGH AND THE ITCZ OVER WESTERN WATERS IS WEAK AND IS SUPPORTING MAINLY MODERATE TRADES. THE PRESSURE GRADIENT HAS TIGHTENED BETWEEN THE RIDGE AND LOWER PRESSURE OVER MEXICO AND THE SW UNITED STATES. THIS HAS PRODUCED A FRESH TO STRONG N-NW BREEZE OVER THE NE FORECAST WATERS OFF BAJA CALIFORNIA NORTE...WITH GALE CONDITIONS DEVELOPING N OF THE AREA. THIS WEATHER PATTERN WILL PERSIST OVER THE NEXT 24 HOURS WITH WINDS DIMINISHING BELOW 20 KT OVER THE N WATERS BY 48 HOURS. SEAS WILL BUILD TO 10 FT IN N-NW SWELL BY EARLY FRI MORNING AND WILL BUILD BRIEFLY TO 13 FEET FRI NIGHT IN THE NE WATERS BEFORE SEAS START TO SUBSIDE THIS WEEKEND. A NEW SURGE OF LONG-PERIOD NW SWELL WILL MOVE INTO NW WATERS ON FRI...WITH COMBINED SEAS AROUND 8 FT MOVING INTO THE AREA. THIS SWELL EVENT WILL ALSO OVERLAP WITH THE AREA OF N-NW SWELL OVER THE NE WATERS OVERNIGHT FRI NIGHT. OTHER THAN THESE AREAS...MAINLY BENIGN CONDITIONS WILL PREVAIL...WITH WINDS AND SEAS BELOW ADVISORY CRITERIA THROUGH THE FORECAST PERIOD. $$ GR