000
AXPZ20 KNHC 270340
TWDEP 

TROPICAL WEATHER DISCUSSION 
NWS NATIONAL HURRICANE CENTER MIAMI FL
0405 UTC TUE DEC 27 2011

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 
0300 UTC.

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

THE MONSOON TROUGH AXIS EXTENDS FROM 09N84W TO 06N90W. THE ITCZ 
AXIS EXTENDS FROM 06N90W TO 11N121W TO BEYOND 10N140W. SCATTERED 
MODERATE TO STRONG CONVECTION WAS NOTED WITHIN 180 NM N OF AXIS 
BETWEEN 108W AND 112W.

...DISCUSSION...

GULF OF TEHUANTEPEC...GALE FORCE WINDS CONTINUE OVER THE GULF OF 
TEHUANTEPEC...AND WILL BE REINFORCED BY NOCTURNAL DRAINAGE FLOW 
DURING THE OVERNIGHT HOURS. AN ADDITIONAL WIND SURGE OVER THE 
GULF OF MEXICO IS EXPECTED TOMORROW WHICH WILL MAINTAIN THE GALE 
FORCE WINDS OVER THE GULF OF TEHUANTEPEC THROUGH WEDNESDAY 
MORNING. WINDS OVER THE GULF OF MEXICO WILL VEER ON WEDNESDAY 
AND DECREASE WINDS FUNNELING INTO THE GULF OF TEHUANTEPEC. THIS 
WILL DIMINISH WINDS BELOW GALE FORCE BY WEDNESDAY AFTERNOON. A 
LARGE AREA OF FRESH NE SWELL OF 8 TO 10 FT GENERATED BY THE GAP 
WIND FLOW ARE REACHING AS FAR WEST AS 110W.

GULF OF CALIFORNIA...RECENT 0116 UTC WINDSAT PASS INDICATES 
FRESH 20 KT WINDS CONTINUE OVER THE GULF OF CALIFORNIA. THE 
PRESSURE GRADIENT BETWEEN PERSISTENT HIGH PRESSURE CENTER NW OF 
THE GULF OF CALIFORNIA...AND TROUGHING OVER MEXICO WILL MAINTAIN 
AREAS OF 20 KT WINDS OVER THE GULF OF CALIFORNIA THROUGH AT 
LEAST WED NIGHT.

GULF OF PAPAGAYO...FRESH TRADEWINDS OVER THE WESTERN CARIBBEAN 
WILL CONTINUE TO FUNNEL INTO THE GULF OF PAPAGAYO THROUGH AT 
LEAST WED NIGHT. WINDS WILL PEAK DURING THE EARLY MORNING HOURS 
WITH THE ADDITION OF NOCTURNALLY DRIVEN KATABATIC WINDS.

HIGH PRES 1026 MB IS CENTERED N OF THE AREA NEAR 34N130W WITH 
RIDGE EXTENDING SE TO NEAR 21N109W. THE PRESSURE GRADIENT 
BETWEEN THIS AREA OF HIGH PRESSURE AND LOWER PRESSURE IN THE 
VICINITY OF THE ITCZ IS MAINTAINING FRESH TO STRONG TRADEWINDS 
FROM 10N TO 25N W OF 130W AND FROM 10N TO 20N BETWEEN 115W AND 
130W. THE AREA OF HIGH PRESSURE WILL PREVAIL JUST N OF THE 
AREA...MAINTAINING THE FRESH TO STRONG TRADEWINDS THROUGH AT 
LEAST WED NIGHT.

$$
AL