000
AXPZ20 KNHC 051002
TWDEP 

TROPICAL WEATHER DISCUSSION                                     
NWS NATIONAL HURRICANE CENTER MIAMI FL                         
1005 UTC SUN APR 05 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 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY  
THROUGH 0900 UTC. 
 
...SPECIAL FEATURES... 

GULF OF TEHUANTEPEC GALE WARNING...THE ASCATB-HIGH RESOLUTION 
SCATTEROMETER PASS AT 05/0312 UTC SHOWED NEAR GALE-FORCE FROM 
15N NORTHWARD BETWEEN 94W AND 95W. THE GALE WARNING WILL 
CONTINUE FOR THE NEXT 12 HOURS INTO THE FUTURE. EXPECT 20 TO 25 
KNOT WIND SPEEDS IN THE AREA ON MONDAY FROM SUNRISE TO THE 
MIDDAY HOURS. EXPECT THOSE SAME CONDITIONS ON WEDNESDAY...ALSO 
FROM SUNRISE TO THE MIDDAY HOURS. THE WIND SPEEDS ARE NOT 
FORECAST TO REACH THE 20 TO 25 KNOT THRESHOLD FOR THE NEXT 
SEVERAL DAYS AFTER WEDNESDAY...AT THIS MOMENT. 
 
...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
            
A SOUTHERN HEMISPHERE ITCZ AXIS IS ALONG 03S101W TO 04S109W TO 
01S116W. CONVECTIVE PRECIPITATION...SCATTERED MODERATE TO 
ISOLATED STRONG FROM 03S TO 05S BETWEEN 99W AND 118W. A NORTHERN 
HEMISPHERE ITCZ IS ALONG 04N89W TO 01N109W TO 05N123W BEYOND 
03N140W. CONVECTIVE PRECIPITATION...SCATTERED TO NUMEROUS STRONG 
FROM 01N TO 04N BETWEEN 92W AND 98W...FROM 07N TO 10N BETWEEN 
110W AND 119W...AND FROM THE ITCZ TO 09N BETWEEN 122W AND 130W. 
SCATTERED MODERATE TO ISOLATED STRONG FROM 10N TO 11N BETWEEN 
130W AND 131W...AND FROM 07N TO 08N BETWEEN 131W AND 132W.

...DISCUSSION... 
    
A MIDDLE LEVEL TO UPPER LEVEL TROUGH PASSES THROUGH 32N131W TO 
25N134W AND TO 18N140W. COMPARATIVELY DRIER AIR IN SUBSIDENCE IS 
APPARENT IN WATER VAPOR IMAGERY TO THE NORTH OF THE LINE THAT 
PASSES THROUGH 20N140W TO 20N130W BEYOND 28N114W.

BROAD UPPER LEVEL ANTICYCLONIC WIND FLOW COVERS THE EASTERN 
PACIFIC OCEAN...FROM THE ITCZ NORTHWARD FROM 107W EASTWARD.

A SURFACE RIDGE PASSES THROUGH 32N142W TO 25N127W TO 19N119W TO 
13N104W. SURFACE TRADE WIND FLOW IS 20 KNOTS OR LESS FROM 07N TO 
15N FROM 133W/134W WESTWARD DURING THE NEXT 48 HOURS. THE SEA 
HEIGHTS REACH 8 TO 9 FEET IN MIXED SWELL DURING THE FIRST 24 
HOURS OF THE FORECAST PERIOD. THE SEA HEIGHTS REACH ONLY 8 FEET 
IN MIXED SWELL DURING THE REST OF THE 48-HOUR FORECAST PERIOD.

EXPECT 8 TO 9 FOOT SEA HEIGHTS...FROM MIXED SWELL...AND WITH 
WINDS 20 KNOTS OR LESS...FROM 28N NORTHWARD BETWEEN 118W AND 
124W...FOR THE NEXT 24 HOURS OR SO. 
   
THE GULF OF PAPAGAYO...EXPECT NOCTURNAL DRAINAGE OF ENE 20-25 KT    
WINDS TONIGHT INTO EARLY SUN ACROSS THE PACIFIC WATERS FROM 09.5-
11.5N FROM 89W EASTWARD...AND SEA HEIGHTS LOWER THAN 8 
FEET...FOR THE NEXT 24 HOURS OR SO. EXPECT NORTHEAST WINDS 20 TO 
25 KNOTS AND SEA HEIGHTS TO 8 FEET FROM 10N TO 12N FROM 89W 
EASTWARD AT 24 HOURS AND AT 48 HOURS...DURING THE FORECAST 
PERIOD.
 
THE GULF OF PANAMA...MODERATE TO FRESH NORTHERLY WINDS ARE 
EXPECTED ACROSS THE GULF OF PANAMA AND DOWNWIND TO 06N DURING 
THE NEXT FEW DAYS. THE SEA HEIGHTS WILL RANGE FROM 5 TO 
7 FEET. 

$$ 
MT