000
AXPZ20 KNHC 270937
TWDEP 

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

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

MONSOON TROUGH AXIS FROM 09N84W TO 06N90W TO 08N110W TO 07N115W. 
ITCZ AXIS FROM 07N115W TO 10N120W TO BEYOND 11N140W. SCATTERED 
MODERATE TO STRONG CONVECTION WITHIN 180 NM N OF AXIS BETWEEN 
110W AND 115W. SCATTERED MODERATE CONVECTION 12N TO 17N BETWEEN 
118W AND 125W.

...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 THROUGH THE EARLY MORNING. 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...A 0116 UTC WINDSAT PASS INDICATED 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 1030 MB IS CENTERED N OF THE AREA NEAR 33N130W WITH 
RIDGE EXTENDING SE TO NEAR 20N110W. 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. NW SWELL WITH HEIGHTS TO 13 FT CONTINUES TO 
PROPAGATE OVER MUCH OF THE AREA W OF 115W...MIXING PRIMARILY 
WITH FRESH NE SWELL FROM THE PERSISTENT TRADE WIND FLOW. 

$$
CHRISTENSEN