000
AXPZ20 KNHC 051553
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC WED JUN 04 2008

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 
1545 UTC.

.INTERTROPICAL CONVERGENCE ZONE AXIS EXTENDS FROM 12N87W TO 
13N92W TO 02N140W. SCATTERED MODERATE ISOLATED STRONG NOTED 
WITHIN 240 NM EITHER SIDE OF LINE FROM 04N77W TO 12N92W TO 
13N105W.

...DISCUSSION...
A NARROW UPPER LEVEL TROUGH EXTENDS SW FROM 32N111W TO 24N120W 
TO 20N145W. NW OF THIS TROUGH AN UPPER RIDGE HAS COLLAPSED E AND 
NOW LIES FROM AN ANTICYCLONE AT 32N143W TO 31N122W ACCOMPANIED 
BY UPPER MOISTURE WITHIN 120 NM EITHER SIDE OF LINE 27N128W TO 
28N144W TO NEAR HAWAII. AN UPPER LEVEL ANTICYCLONE IS CENTERED 
OVER OLD MEXICO NEAR 24N104W WITH AN UPPER RIDGE EXTENDING SW TO 
A SHARP CREST AT 08N138W. JUST TO THE SW OF THIS RIDGE A NARROW 
UPPER TROUGH LIES ALONG 20N100W THROUGH A DISSIPATING UPPER 
CYCLONE AT 18N108W WITH THE TROUGH CONTINUING SW THROUGH UPPER 
CYCLONES AT 08N116W AND 05N120W. 

AN UPPER ANTICYCLONE IS OBSERVED NEAR 13N91W WITH ITS ENVELOPE 
OF ANTICYCLONIC FLOW DOMINATING THE UPPER LEVELS OF THE TROPICS 
E OF 100W. ASSOCIATED UPPER DIFFLUENCE IS ENHANCING CONVECTION 
OVER THE DISCUSSION AREA SE OF A LINE FROM THE BAY OF CAMPECHE 
TO THE E PAC ITCZ AT 10N115W. THE RESULTANT DEBRIS MOISTURE 
BASICALLY REMAINS S OF 21N E OF 100W. OTHERWISE THE UPPER LEVELS 
ARE VERY DRY AND LIMITING CONVECTION TO A ONLY A FEW TSTMS ALONG 
THE ITCZ NEAR 123W AND 140W.

SURFACE HIGH PRESSURE IS STATIONARY NEAR 34N144W 1031 MB AND 
RIDGES SE TO 20N118W. NW WINDS AT 20 KT ARE OBSERVED OVER THE 
WATERS E OF THE RIDGE TO THE BAJA PENINSULA AND NE TRADES 15 TO 
20 KT ARE CONTINUING SW OF THE RIDGE AXIS. SOUTHERLY WINDS ARE 
CONTINUING OVER THE DEEP TROPICAL WATERS FROM 06N TO 11N BETWEEN 
117W AND 85W.  

$$
NELSON