000
AXPZ20 KNHC 031509
TWDEP 

TROPICAL WEATHER DISCUSSION   
NWS NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC SUN APR 03 2011

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 1500 UTC.

...ITCZ...

AXIS IS CENTERED ALONG 07N78W TO 04N91W TO 05N127W TO 02N140W. 
SCATTERED MODERATE ISOLATED STRONG CONVECTION WITHIN 75 NM OF 
AXIS E OF 90W. SCATTERED MODERATE TO STRONG CONVECTION WITHIN 
150 NM EITHER SIDE OF AXIS BETWEEN 92W AND 100W. 

...DISCUSSION...

SURFACE HIGH PRESSURE 1030 MB IS CENTERED N OF THE AREA NEAR 
35N135W. A SURFACE TROUGH EXTENDS FROM 27N123W TO 22N131W. THE 
PRESSURE GRADIENT BETWEEN THESE FEATURES IS SUPPORTING FRESH TO 
STRONG NE WINDS NW OF A LINE FROM 30N124W TO 23N133W TO 23N140W. 
NW SWELL WITH SEAS OF 10 TO 14 FT PREVAILS OVER THIS AREA. THESE 
WINDS WILL CONTINUE THROUGH MONDAY MORNING...BUT WILL BEGIN TO 
DIMINISH SOME IN AREAL DURING MONDAY AS THE HIGH WEAKENS WHILE 
MOVING S. SEAS OF 10 TO 14 FT WILL PREVAIL OVER THE NW PART OF 
THE AREA THROUGH TONIGHT...THEN WILL GRADUALLY SUBSIDE TO 8 TO 
10 FT EARLY TUE. 

NW SWELL TO 9 FT PREVAILS OVER MUCH OF THE AREA W OF 100W. SEAS 
WILL GRADUALLY DIMINISH OVER THE NEXT 48 HOURS...AND THE 
COVERAGE OF 8 FT SEAS WILL DECREASE. ALSO BY TUE MORNING...SEAS 
WILL INCREASE TO 8 TO 10 FT S OF 5N BETWEEN 100W AND 130W IN SW 
SWELL. 

FRESH TO STRONG TRADEWINDS OVER THE SOUTHWESTERN CARIBBEAN ARE 
FUNNELING THROUGH THE CENTRAL AMERICA PASSES INTO THE GULF OF 
PAPAGAYO. FRESH 20 KT WINDS WILL PEAK EACH MORNING THOUGH TUE 
MORNING WITH THE ADDITIONAL CONTRIBUTION OF NOCTURNAL DRAINAGE 
FLOW. 

$$
AL