000
AXPZ20 KNHC 052110
TWDEP 

TROPICAL WEATHER DISCUSSION   
NWS NATIONAL HURRICANE CENTER MIAMI FL
2205 UTC THU MAY 05 2011

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

BASED ON 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
2100 UTC.

...ITCZ...

THE INTERTROPICAL CONVERGENCE ZONE AXIS IS CENTERED ALONG 05N77W 
TO 10N109W THEN CONTINUES FROM 10N113W TO 05N140W. SCATTERED 
MODERATE TO STRONG CONVECTION IS NOTED WITHIN 120 NM EITHER SIDE 
OF AXIS E OF 94W. SCATTERED MODERATE TO STRONG CONVECTION IS 
NOTED WITHIN 120 NM N OF AXIS AND 90 NM S OF AXIS BETWEEN 99W 
AND 103W. 

...DISCUSSION...

HIGH PRESSURE 1030 MB IS CENTERED NEAR 34N148W WITH RIDGE 
EXTENDING SE TO NEAR 19N112W. THE PRESSURE GRADIENT BETWEEN THIS 
FEATURE AND LOWER PRESSURE IN THE VICINITY OF THE ITCZ IS 
MAINTAINING A SMALL AREA OF FRESH 20 KT TRADES FROM 05N TO 13N W 
OF 133W AS INDICATED BY THE LATEST ASCAT PASS. THE RIDGE WILL 
REMAIN OVER THE SAME GENERAL AREA OVER THE NEXT COUPLE OF 
DAYS...MAINTAINING THIS SMALL AREA OF FRESH 20 KT TRADES THROUGH 
THE FORECAST PERIOD. 

GAP WINDS...
MOST RECENT OBSERVATIONS INDICATE THAT WINDS HAVE DIMINISHED 
BELOW GALE FORCE IN THE GULF OF TEHUANTEPEC. SURFACE WINDS WILL 
DIMINISH OVER THE NEXT 48 HOURS...AND WILL FALL BELOW 20 KT BY 
SAT AFTERNOON. NE SWELLS THAT RESULTED FROM THIS GALE EVENT ARE 
CURRENTLY AFFECTING THE AREA FROM 04N TO 15N BETWEEN 92W AND 
108W WITH SEAS OF 8 TO 11 FT. THE SWELL WILL CONTINUE TO SPREAD 
S AND W WHILE SUBSIDING OVER THE NEXT 48 HOURS...WITH SEAS 
SUBSIDING BELOW 8 FT BY SAT AFTERNOON. 

FRESH TO STRONG 20 TO 25 KT WINDS CONTINUE OVER THE GULF OF 
PAPAGAYO. THESE WINDS WILL CONTINUE THROUGH SATURDAY MORNING 
BEFORE DIMINISHING BELOW 20 KT BY SAT AFTERNOON. 

$$
AL