000
AXPZ20 KNHC 250323
TWDEP 

TROPICAL WEATHER DISCUSSION    
NWS NATIONAL HURRICANE CENTER MIAMI FL
0405 UTC WED APR 25 2012

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 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0300 UTC.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
ITCZ AXIS FROM 08N90W TO 06N117W TO 02N128W. SCATTERED MODERATE 
CONVECTION WAS NOTED WITHIN 180 NM N OF AXIS BETWEEN 95W AND 
108W. SCATTERED MODERATE CONVECTION WAS NOTED WITHIN 180 NM OF 
AXIS BETWEEN 108W TO 124W. 

...DISCUSSION...

SURFACE LOW PRESSURE 1009 MB CENTERED JUST N OF THE AREA NEAR 
31N131W WITH ASSOCIATED COLD FRONT OVER FORECAST WATERS FROM 
30N123W TO 21N128W. THE WEAKENING LOW PRESSURE CENTER WILL DRIFT 
INTO THE FAR N PART OF THE AREA WED WHERE IT WILL DISSIPATE BY 
WED NIGHT. NW SWELL GENERATED FROM THIS SYSTEM WILL SPREAD SE 
ACROSS NW CORNER OF BASIN WITH SEAS PEAKING NEAR 16 FT TONIGHT 
BEFORE SUBSIDING THROUGH THU.

GAP WINDS...
GULF OF TEHUANTEPEC...HIGH PRES CENTERED OVER THE GULF OF MEXICO 
IS PRODUCING NE WINDS OVER THE BAY OF CAMPECHE. THESE WINDS ARE 
FUNNELING THROUGH THE CHIVELA PASS INTO THE GULF OF 
TEHUANTEPEC...THOUGH WINDS HAVE DIMINISHED BELOW GALE FORCE. 
WITH THE AREA OF HIGH PRESSURE SHIFTING EASTWARD 
OVERNIGHT...WINDS OVER THE SW GULF OF MEXICO WILL VEER. THIS 
WILL DECREASE WINDS FLOW INTO THE GULF OF TEHUANTEPEC WITH WINDS 
DIMINISHING BELOW 20 KT LATE WED NIGHT. 

GULF OF PAPAGAYO...THE EASTERN MIGRATION OF THE HIGH PRES CENTER 
OVER GULF OF MEXICO HAS INCREASED THE PRESSURE GRADIENT OVER 
WESTERN CARIBBEAN AND CENTRAL AMERICA. THIS HAS INCREASED FLOW 
THROUGH THE GAP IN TOPOGRAPHY OVER NICARAGUA YIELDING FRESH TO 
STRONG E WINDS THROUGH GULF OF PAPAGAYO. THESE WINDS ARE 
EXPECTED TO CONTINUE THROUGH WED.

GULF OF PANAMA...PRESSURE GRADIENT MENTIONED ABOVE ALSO 
INCREASED NORTHERLY WINDS INTO THE GULF OF PANAMA. THESE WINDS 
WILL DIMINISH BELOW 20 KT BY THU AFTERNOON. 

$$
AL