000
AXPZ20 KNHC 051553
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC WED MAR 05 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 
1445 UTC.
 
...ITCZ...
AXIS ALONG...6N77W  3N83W  3N108W  6N123W  4N133W  5N140W.  
SCATTERED MODERATE WITHIN 60 NM OF 7N131W.

...DISCUSSION...
UPPER LEVEL...
UNABLE TO MAKE ANY FURTHER EASTWARD ADVANCEMENT AGAINST STRONG 
WELL ANCHORED MID-UPPER LEVEL RIDGE CENTERED WITH ANTICYCLONE AT 
8N123W...WEAK UPPER LEVEL TROUGH OPTED TO LAY DOWN FROM 32N120W 
TO 20N140W.  ZONAL WLY FLOW E OF TROUGH AXIS FLATTENS RIDGE 
CREST WITH 100 KT JET CORE.  RIDGE THEN ABLE TO ADVECT TRPCL 
MOISTURE FROM DIFLUENT FLOW BETWEEN TROUGH AXIS AND ANTICYCLONE 
NEWD INTO CENTRAL E PAC WHERE WELL ESTABLISHED SURFACE RIDGE CAP 
ANY SIGNIFICANT CLOUD DEVELOPMENT.  ELSEWHERE E PAC REMAINS DRY 
EXCEPT S OF 5N E OF 98W WHERE CARIBBEAN RIDGE BRINGS SOME 
MOISTURE FROM SOUTH AMERICA. 

AT THE SURFACE...
NEW RIDGE DEVELOPING NEAR 34N130W SHOULD BUILD SE TO 20N115W. 
THIS SHOULD SLOWLY STRENGTHEN NE TRADES FROM 10N-20N W OF 120W 
AND STRONGER NW WIND ALONG GULF OF CALIFORNIA.

STALLING COLD FRONT ACROSS SE GULF OF MEXICO EFFECTIVELY SHUT 
OFF WINDS ACROSS GULF OF TEHUANTEPEC GAP.  WEAKENING LOW PRES 
1010 MB OVER COLOMBIA DID LIKEWISE TO GULF OF PAPAGAYO WINDS.  

$$
WALLY BARNES