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Eastern Pacific Tropical Weather Discussion (Text)



000
AXPZ20 KNHC 190235
TWDEP 

TROPICAL WEATHER DISCUSSION                                    
NWS NATIONAL HURRICANE CENTER MIAMI FL                         
0405 UTC SUN APR 19 2015

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 
0200 UTC. 

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...              

ITCZ AXIS EXTENDS FROM 04N102W TO 02N113W TO 05N135W. SCATTERED 
MODERATE ISOLATED STRONG CONVECTION FROM 06N TO 12N BETWEEN 131W 
AND 137W.

...DISCUSSION... 

E OF 120W...A WEAK PRESSURE PATTERN CONTINUES ACROSS THE REGION. 
RECENT SHIP OBS AND SCATTEROMETER DATA INDICATE WIDESPREAD LIGHT 
TO GENTLE WINDS. SEAS ARE GENERALLY 4-6 FT. 

W OF 120W...A LARGE AREA OF CONVECTIVE ACTIVITY CONTINUES FROM 
08N-12N W OF 130W...FROM LOW LEVEL TRADE WIND CONVERGENCE AND 
DIVERGENT FLOW ALOFT BETWEEN A SHARP UPPER TROUGH NW OF AREA AND 
A BROAD UPPER RIDGE CENTERED NEAR 10N123W. A SURFACE TROUGH 
ALONG 138W IS NEARLY STATIONARY. FRESH TRADE WINDS PERSIST N OF 
THE CONVERGENCE ZONE AND S OF A MODERATELY STRONG SUBTROPICAL 
RIDGE. LONG PERIOD NW SWELL CONTINUES TO PROPAGATE INTO THE 
REGION. ALTIMETER DATA SHOW 8-9 FT SEAS FROM 10N-20N. FOLLOWING 
ECWAVE GUIDANCE...WHICH IS MORE INDICATIVE OF ENSEMBLE MEANS 
INDICATING 8 FT SWELL WILL PERSIST INTO MON...WHILE THE MWW3 
MODEL DECAYS MOST OF THE SWELL TO LESS THAN 8 FT SUN.

$$
MUNDELL

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Page last modified: Sunday, 19-Apr-2015 02:35:33 UTC