000 AXPZ20 KNHC 121553 TWDEP TROPICAL WEATHER DISCUSSION NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 1605 UTC WED MAY 12 2010 TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM THE EQUATOR TO 32N...EAST OF 140W. BASED ON 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 1500 UTC. ...ITCZ... ITCZ AXIS ALONG 08N83W TO 05N95W TO 09N115W TO 06N140W. SCATTERED MODERATE TO ISOLATED STRONG FROM 01N TO 08N E OF 83W. ISOLATED MODERATE WITHIN 120 NM S OF AXIS BETWEEN 93W AND 120W. SCATTERED MODERATE FROM 05N TO 09N BETWEEN 120W AND 140W. ...DISCUSSION... AN UPPER LEVEL TROUGH EXTENDS SW INTO THE DISCUSSION AREA NEAR 32N112W TO 20N120W. MAINLY DRY AIR IS IN PLACE W OF 120W. AN UPPER LEVEL TROPICAL ANTICYCLONE IS POSITIONED NEAR 05N130W WITH A RIDGE EXTENDING ALONG 05N BETWEEN 110W AND 140W. CONVECTION IS BEING ENHANCED ALONG AND S OF THE RIDGE UNDER UPPER DIFFLUENCE ALONG THE ITCZ W OF 110W. ANOTHER UPPER LEVEL ANTICYCLONE IS CENTERED NEAR 10N100W. A 70 -90 KT JETSTREAM IS BETWEEN THIS CENTER AND THE ABOVE MENTIONED UPPER LEVEL TROUGH PRODUCING PLENTIFUL MIDDLE TO UPPER LEVEL MOISTURE ACROSS CENTRAL MEXICO N OF 17N BETWEEN 100W AND 110W. AN UPPER LEVEL CYCLONE IS NEAR 03N86W OVER THE ITCZ. UPPER LEVEL DIFFLUENCE E OF THE CENTER IS ENHANCING ITCZ CONVECTION E OF 85W. AT THE SURFACE...A BROAD RIDGE AXIS DOMINATES THE MAJORITY OF THE DISCUSSION AREA WITH AXIS FROM NEAR 32N133W TO 14N105W. NE TRADES IN THE 20-25 KT ARE SW OF THE RIDGE AXIS FROM 08N TO 27N W OF 120W. 20-30 KT NW-N WINDS ARE OCCURRING N OF 22N BETWEEN 110W AND 120W. NE AND NW SWELLS ARE THE PRIMARY SWELLS OVER THE WATERS WHERE THE TRADES AND NW-N WINDS ARE OCCURRING WITH A SERIES OF LONG PERIOD CROSS EQUATORIAL SOUTHERLY SWELL GROUPS DOMINATING THE REMAINDER OF THE DISCUSSION AREA. THE HIGHEST COMBINED SEAS OF UP TO 12 FT ARE OCCURRING ALONG 20N W OF 132W. GAP WINDS...NE TO E WINDS AT 20 TO 25 KT ARE SURGING OVER THE GULF OF PAPAGAYO AND DOWNWIND TO NEAR 10N90W AND ARE EXPECTED TO EXPAND TO 09N95W OVER THE NEXT 24 AND 48 HOURS. $$ FORMOSA