000
AXPZ20 KNHC 031505
TWDEP 

TROPICAL WEATHER DISCUSSION                                     
NWS NATIONAL HURRICANE CENTER MIAMI FL                         
1605 UTC FRI APR 03 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 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
1430 UTC. 

...SPECIAL FEATURES... 

GULF OF TEHUANTEPEC GALE WARNING...A TIGHT PRESSURE GRADIENT 
WILL DEVELOP ACROSS THE AREA BY SAT MORNING AS HIGH PRESSURE AND 
ATTENDANT RIDGING FORM ALONG EASTERN MEXICO WHILE LOWER PRESSURE 
SETS UP OFFSHORE TO THE S OF THE TEHUANTEPEC AREA. NORTHERLY 
WINDS OF 20-25 KT WILL INITIALLY BE INDUCED BY THIS PATTERN... 
INCREASING TO MINIMAL GALE FORCE LATE SAT NIGHT WHICH WILL 
PERSIST INTO SUN MORNING. SEAS WILL BUILD TO UP TO 13-14 FT BY 
SUN MORNING.
 
...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... 

THE ITCZ AXIS EXTENDS FROM 05N99W TO 04N110W TO 03N120W TO 
02N135W. SCATTERED MODERATE CONVECTION IS FROM 02N TO 05N 
BETWEEN 104W AND 116W. ADDITIONALLY...SCATTERED MODERATE 
CONVECTION IS FROM 04N TO 07N E OF 89W S OF THE GULF OF 
PANAMA...AS WELL AS FROM 04N TO 07N BETWEEN 92W AND 96W WHERE 
THE ITCZ IS ILL-DEFINED.
 
...DISCUSSION... 

A 1033 MB HIGH PRESSURE CENTER IS LOCATED NW OF THE AREA NEAR 
37N143W WITH A RIDGE EXTENDING TO THE SE TO NEAR 20N110W JUST S 
OF THE SOUTHERN TIP OF THE BAJA CALIFORNIA PENINSULA. SURFACE 
TROUGHING IS EVIDENT ALONG COASTAL CALIFORNIA AND THE 
COMBINATION BETWEEN THE TROUGHING AND THE RIDGING IS MAINTAINING 
FRESH TO STRONG NORTHERLY WINDS ALONG THE CENTRAL CALIFORNIA 
COAST...WITH GALE FORCE WINDS OFF OF POINT CONCEPTION. THESE 
WINDS CONTINUE TO GENERATE FRESH NORTHERLY SWELLS WHICH ARE 
PROPAGATE SOUTHWARD INTO THE DISCUSSION WATERS WITH HEIGHTS OF 8-
10 FT N OF 26N BETWEEN 116W AND 131W. FRESH NORTHERLY SWELL WILL 
CONTINUE TO PUSH INTO OUR N CENTRAL WATERS THROUGH SUN MORNING.

THE HIGH PRESSURE RIDGING COMBINED WITH LOWER PRESSURE NEAR THE 
ITCZ IS ALSO SUPPORTING FRESH TRADE WIND FLOW ACROSS THE W 
CENTRAL WATERS. THESE WINDS COMBINED WITH LONG PERIOD NW SWELL 
IS MAINTAINING AN AREA OF 8-9 FT SEAS WHICH WILL PERSIST THROUGH 
AT LEAST SUN MORNING.

GAP WINDS...                                                  
GULF OF PAPAGAYO...WINDS WILL PULSE TO FRESH TO STRONG LEVELS IN 
AND DOWNWIND OF THE GULF DURING THE LATE NIGHT AND EARLY MORNING 
HOURS THROUGH SUN WITH THE AIDE OF OFFSHORE NOCTURNAL DRAINAGE 
FLOW...AS WELL AS DUE TO HIGH PRESSURE BUILDING ACROSS THE NW 
CARIBBEAN SEA AND NORTHERN CENTRAL AMERICA. SEAS WILL BUILD TO 
UP TO 8 FT SUN MORNING.

GULF OF PANAMA...MODERATE TO FRESH NORTHERLY WINDS ARE EXPECTED 
ACROSS THE GULF OF PANAMA AND DOWNWIND TO ABOUT 06N OVER THE 
NEXT COUPLE OF DAYS WITH BUILDING SEAS OF 5-7 FT.
 
$$ 
LEWITSKY