000 AXPZ20 KNHC 261553 TWDEP TROPICAL WEATHER DISCUSSION NWS NATIONAL HURRICANE CENTER MIAMI FL 1605 UTC THU MAY 26 2011 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. ...ITCZ... AXIS FROM 08N82W TO 10N91W TO 10N110W TO 06N125W TO 07N134W TO 05N140W. ISOLATED MODERATE CONVECTION WITHIN 90 NM S OF AXIS E OF 88W. SCATTERED MODERATE CONVECTION WITHIN 180 NM N OF AXIS FROM 89W TO 100W AND WITHIN 60 NM OF AXIS FROM 115W TO 120W. ...DISCUSSION... UPPER LEVEL TROUGH ENTERED NW CORNER OF E PAC PRESENTLY FROM 32N130W TO WELL DEFINED CYCLONIC VORTEX AT 20N138W. SLY JET CORE OF 50 KT TRAPPED BETWEEN VORTEX AND DOWNSTREAM RIDGE ADVECTS ABUNDANT MOISTURE AWAY FROM TROPICS W OF 125W. COMPLEX RIDGE E OF JET ANCHORED BY ANTICYCLONES AT 16N115W AND 17N96W WITH WEAK SHALLOW TROUGH FROM 22N106W TO 13N109W COVER REMAINDER OF BASIN EASTWARD. EASTERNMOST GYRE KEEPS PERSISTENT MODERATE 20-25 NE WIND SHEAR OVER ISOLATED CONVECTION ASSOCIATED WITH WEAK 1010 MB LOW PRES AT 12N94W. UNFAVORABLE ENVIRONMENT ALOFT AND W OF SYSTEM PRECLUDE ANY SIGNIFICANT TROPICAL ORGANIZATION. STILL...MODERATE DIFFLUENCE ALOFT SE OF LOW PRES ENHANCES SCATTERED CONVECTION ALONG ITCZ E OF 88W. ...ELSEWHERE AT THE SURFACE... BROAD HIGH PRES WELL W OF BASIN EXTEND EASTWARD TO 15N113W PROMPTING FRESH NE TRADES FROM 08N TO 21N W OF 128W AND STRONG NW BREEZE ALONG W COAST OF BAJA CALIFORNIA PENINSULA. TRADES WEAKEN AS RIDGE DRIFT EASTWARD BUT BAJA CALIFORNIA WINDS INCREASE IN STRENGTH AND COVERAGE WITHIN 24 HRS WITH GALE FORCE WINDS N OF 30N E OF 124W. ASSOCIATED NW SWELLS BUILD AND SPREAD S AND W THROUGH FORECAST PERIOD. LARGE CROSS-EQUATORIAL SW SWELL WITH LONG PERIODS BUILD SEAS TO 8 FT S OF 07N W OF 95W. SWELL SUBSIDE BY END OF FORECAST PERIOD AS IT SPREAD NORTHWARD. $$ WALLY BARNES