000
AXPZ20 KNHC 260423
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
0405 UTC TUE FEB 26 2008

TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM 
THE EQUATOR TO 32N...EAST OF 140W. 

BASED ON 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0330 UTC.
 
...ITCZ...
ITCZ AXIS ALONG 2N79W 9N110W 4N140W.  SCATTERED MODERATE WITHIN 
90 NM OF AXIS FROM 115W TO 127W. 

...DISCUSSION...
LARGE AMPLITUDE TROUGH EXTEND FROM 32N121W TO CYCLONIC VORTEX AT 
13N131W.  VERY DRY AIR MASS DUE TO MODERATE TO STRONG SUBSIDENCE 
IN SW SEMICIRCLE OF VORTEX AND MODERATE DIFFLUENT PATTERN 
ENHANCING SCATTERED MODERATE CONVECTION ALONG ITCZ IN ERN 
QUADRANT OF CENTER FROM FROM 113W TO 126W.  MOISTURE DEBRIS FROM 
ITCZ RIDING WEAK 60 KT JET INTO SRN BAJA CALIFORNIA AND CENTRAL 
MEXICO WITH LITTLE SIGNIFICANT IMPACT DUE TO A LACK OF UPLIFTING 
MECHANISMS.  EXCEPT S OF 8N E OF 90W...REMAINDER E PAC IS UNDER 
INFLUENCE OF CARIBBEAN MID-UPPER RIDGE WHICH EXTENDS ALL THE WAY 
TO 110W.  

WEAK RIDGE WITH AXIS FROM 32N128W TO 17N140W ADVECTING MOISTURE 
INTO NW CORNER OF BASIN AHEAD OF DEEP LAYER LARGE AMPLITUDE 
TROUGH.  TROUGH LIKELY TO BECOME WEATHER MAKER LATER BEYOND 
FORECAST PERIOD ONCE IT GETS INTO E PAC AS NEGATIVE TILT IS 
BECOMING EVIDENT AT THIS TIME.  

AT THE SURFACE...
HIGH PRES CENTER 1029 MB AT 33N126W HAS RIDGE EXTEND 13N106W 
BRINGING STRONG WINDS ALONG BOTH SIDES OF BAJA CALIFORNIA COAST.

APPROACHING DEEP LAYER TROUGH WILL FORCE STRONG COLD FRONT CLOSE 
TO NW CORNER OF BASIN INCREASING SLY WINDS AND INTRODUCING 
ANOTHER SET OF LONG PERIOD SWELLS SPREADING SE THROUGH WED. 

GULF OF PAPAGAYO GAP WINDS EXPECTED TO SUBSIDE WITHIN NEXT 24 
HRS AS CARIBBEAN RIDGE RETREATS E AND WEAKENS TRADE WINDS.

ANOTHER STRONG COLD FRONT SWEEPING ACROSS GULF OF MEXICO BY WED 
WILL FORCE WINDS ACROSS BAY OF CAMPECHE AND GULF OF TEHUANTEPEC 
INTO DEVELOPING STORM.

LARGE LONG PERIOD SWELLS CONTINUE SPREADING SE FROM RECENT GALE 
EVENT ALONG NRN SECTIONS OF E PAC.  AS THEY SUBSIDE...NEW SET OF 
NW SWELLS APPROACHES FROM NEXT COLD FRONT BY WED.  

WALLY BARNES