000
AXPZ20 KNHC 300226
TWDEP 

TROPICAL WEATHER DISCUSSION 
NWS NATIONAL HURRICANE CENTER MIAMI FL 
0405 UTC FRI MAY 30 2014

TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM 
THE EQUATOR TO 32N...EAST OF 140W. THE FOLLOWING INFORMATION IS 
BASED ON SATELLITE IMAGERY...WEATHER OBSERVATIONS...RADAR...AND 
METEOROLOGICAL ANALYSIS.

BASED ON 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0215 UTC.

...TROPICAL WAVES...

A TROPICAL WAVE IS N OF 03N ALONG 85W WITH THE NORTHERN PORTION 
EXTENDING ACROSS WESTERN COSTA RICA. THIS WAVE IS MOVING W 
AROUND 5-10 KT. ASSOCIATED SCATTERED MODERATE AND ISOLATED 
STRONG CONVECTION IS WITHIN 60 NM OF 18.5N108W. GLOBAL MODELS 
DEVELOP WEAK LOW PRES ALONG THE NORTHERN PORTION OF THE TROPICAL 
WAVE NEAR 11N95W BY 48 HOURS. WINDS AROUND THE LOW ARE FORECAST 
TO INCREASE TO FRESH LEVELS WHICH WILL BUILD SEAS TO 8 FT WITH 
SW SWELL WITHIN 300 NM IN THE SW SEMICIRCLE.
  
...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...           

THE MONSOON TROUGH EXTENDS FROM 09N89W TO LOW PRES NEAR    
12N97W TO 16N103W...THEN RESUMES FROM 11N112W TO 08N120W TO LOW 
PRES NEAR 09N132W TO 06N136W. THE ITCZ AXIS EXTENDS FROM 06N136W 
TO BEYOND 04N140W. SCATTERED MODERATE AND ISOLATED STRONG 
CONVECTION IS WITHIN 150 NM S OF A LINE FROM 10N94W TO 08N105W 
...WITHIN 150 NM S OF THE MONSOON TROUGH BETWEEN 97W AND 101W... 
WITHIN 120 NM W OF A LINE FROM 16N102W TO 09N102W...AND ALSO 
WITHIN 60-120 NM EITHER SIDE OF THE MONSOON TROUGH BETWEEN 112W 
AND 120W. SCATTERED MODERATE CONVECTION IS WITHIN 120 NM S OF 
THE MONSOON TROUGH BETWEEN 129W AND 131W.

...DISCUSSION...     

POST-TROPICAL REMNANT LOW AMANDA AT 1006 MB IS CENTERED NEAR 
16N108.5W. A SMALL CLUSTER OF CONVECTION REMAINS WELL TO THE NE 
OF THE IMMEDIATE CENTER WITH SCATTERED MODERATE AND ISOLATED 
STRONG CONVECTION WITHIN 60 NM OF 18.5N108W. THE CENTER ITSELF 
IS COMPLETELY EXPOSED. THE LOW WILL CONTINUE TO WEAKEN WITH 
ASSOCIATED WINDS DIMINISHING TO 20 KT OR LESS WITHIN THE NEXT 24 
HOURS...AND WITH ANY RESIDUAL SEAS/SWELL SUBSIDING TO LESS THAN 
8 FT BY 36 HOURS.

1032 MB HIGH PRES IS CENTERED WELL NW OF THE AREA NEAR 42N141W. 
THIS HIGH EXTENDS A RIDGE SE ACROSS THE WATERS THROUGH 32N137W 
TO 23N111W. GALE FORCE WINDS CONTINUE TO BLOW W OF NORTHERN 
CALIFORNIA WITH FRESH TO STRONG NORTHERLY WINDS SPREADING S ALL 
THE WAY TO 32N. THESE WINDS CONTINUE TO SUPPORT CONFUSED AND 
COMBINED SEAS OF 8-10 FT ACROSS THE FAR NW AND N CENTRAL 
DISCUSSION WATERS WHICH IS MIXING WITH SEVERAL LONG PERIOD SWELL 
TRAINS. COMBINED SEAS ARE FORECAST TO SUBSIDE TO LESS THAN 8 FT 
BY 24-30 HOURS.

1008 MB LOW PRES IS EMBEDDED IN THE MONSOON TROUGH NEAR 09N132W. 
ASSOCIATED CONVECTION HAS RAPIDLY DIMINISHED DURING THE 
AFTERNOON AND EVENING HOURS. NEARBY WINDS ARE MAINLY 10-15 KT 
WITH SEAS 6-7 FT. THE LOW WILL CONTINUE WESTWARD REACHING 
07N136W BY 24 HOURS...AND 07N140W BY 48 HOURS. THE LOW MAY 
WEAKEN INTO AN OPEN TROUGH AS IT APPROACHES 140W.

CROSS EQUATORIAL SW SWELL IS REACHING THE FAR SOUTH-CENTRAL 
WATERS SW OF THE GALAPAGOS ISLANDS...AND WILL GRADUALLY SPREAD 
NORTHWARD COVERING THE WATERS S OF A LINE FROM 00N81W TO 00N94W 
TO 03.4S109W BY SAT EVENING.
 
$$
LEWITSKY