000
AXPZ20 KNHC 062053
TWDEP 

TROPICAL WEATHER DISCUSSION   
NWS NATIONAL HURRICANE CENTER MIAMI FL
2205 UTC FRI MAY 06 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 ALONG 07N77W TO 
06N81W TO 07N97W TO 06N108W TO 08N115W TO 07N133W TO 04N140W 
WITH SCATTERED MODERATE TO ISOLATED STRONG CONVECTION NOTED 
WITHIN 90 NM EITHER SIDE OF AXIS E OF 88W. 


...DISCUSSION...

HIGH PRESSURE 1031 MB IS CENTERED NEAR 35N155W HAS RIDGE 
EXTENDING SE TO NEAR 15N107W. THE PRESSURE GRADIENT BETWEEN THE 
RIDGE AND LOWER PRESSURE NEAR THE ITCZ IS MAINTAINING FRESH 20 
KT TRADES FROM 07N TO 14N W OF 125W. THE RIDGE WILL REMAIN OVER 
THE SAME GENERAL AREA AND WILL MAINTAIN THIS SMALL AREA OF FRESH 
TRADES THROUGH THE FORECAST PERIOD.  

GAP WINDS...
WINDS CONTINUE TO DIMINISH ACROSS THE GULF OF TEHUANTEPEC AS 
HIGH PRES N OF THE AREA WEAKENS. THE LATEST ASCAT PASS INDICATED 
NORTHERLY WINDS OF 20 TO 25 KT. WINDS ARE FORECAST TO DIMINISH 
BELOW 20 KT BY MIDDAY SAT.

FURTHER SOUTH...WINDS WILL REMAIN NEAR 20 KT OVER THE GULF OF 
PAPAGAYO THROUGH SATURDAY NIGHT...THEN WILL PULSE TO 20 KT 
DURING THE LATE NIGHT/EARLY MORNING HOURS DUE TO NOCTURNAL 
DRAINAGE FLOW.

$$
AL