000
AXPZ20 KNHC 041606
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 05N78W TO 
13N94W TO 02N140W. SCATTERED MODERATE ISOLATED STRONG CONVECTION 
NOTED WITHIN 240 NM EITHER SIDE OF LINE FROM 04N77W TO 12N96W TO 
08N109W. SCATTERED MODERATE TO STRONG CONVECTION ALSO NOTED N OF 
14N BETWEEN 92W AND 96W.

...DISCUSSION...
A NARROW UPPER LEVEL TROUGH EXTENDS SW FROM 32N114W TO 28N1114W
TO 22N130W INTO AN UPPER CYCLONE W OF THE AREA AT 16N154W. NW OF 
THIS TROUGH AN UPPER RIDGE IS COLLAPSING SE ALONG 33N136W TO 
32N118W ACCOMPANIED BY EVAPORATING UPPER MOISTURE. AN UPPER 
LEVEL ANTICYCLONE IS CENTERED OVER OLD MEXICO NEAR 26N104W WITH 
AN UPPER RIDGE EXTENDING SW TO 07N131W TO 05N136W. JUST TO THE
SW OF THIS RIDGE AN UPPER CYCLONE IS FILLING AS IT MOVES W NEAR 
18N103W. AN UPPER ANTICYCLONE IS OBSERVED NEAR 10N84W WITH ITS 
ENVELOPE OF ANTICYCLONIC FLOW DOMINATING THE UPPER LEVELS OF THE 
TROPICS E OF 92W. 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 06N120W. THE RESULTANT DEBRIS 
MOISTURE BASICALLY REMAIN 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 125W AND 08N138W.

SURFACE HIGH PRESSURE NEAR 33N144W 1030 MB RIDGES SE TO 13N110W. 
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 SETTING UP SW 
OF THE RIDGE AXIS. SOUTHERLY WINDS ARE CONTINUING OVER THE DEEP 
TROPICAL WATERS FROM 05N TO 10N BETWEEN 115W AND 85W.  

$$
NELSON