000
AXPZ20 KNHC 222116
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
2205 UTC MON NOV 22 2010

TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM 
THE EQUATOR TO 32N...EAST OF 140W.

BASED ON 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
2100 UTC.

...ITCZ...
AXIS IS ALONG 09N84W TO 08N90W TO 09N127W TO 09N140W. SCATTERED 
MODERATE TO STRONG WITHIN 30 NM OF AXIS BETWEEN 87W AND 102W. 

...DISCUSSION...
STRONG 1038 MB HIGH PRESSURE IS CENTERED NEAR 41N146W WITH RIDGE 
EXTENDING SE ACROSS THE N PART OF THE AREA TO 16N108W. THE 
PRESSURE GRADIENT BETWEEN THIS RIDGE AND LOWER PRESSURE NEAR THE 
ITCZ IS MAINTAINING FRESH TRADES FROM 12N TO 23N W OF 117W. THE 
HIGH PRESSURE SYSTEM WILL REMAIN STATIONARY AND CONTINUE TO 
MAINTAIN A TIGHT PRESSURE GRADIENT FOR FRESH WINDS TO CONTINUE 
THROUGH THE FORECAST PERIOD.  

LARGE NLY SWELLS TO 13 FT ARE NOTED N OF 23N W OF 120W. THESE 
SWELLS WILL CONTINUE TO PROPAGATE SOUTHWARD OVER THE FORECAST 
AREA W OF 115W. IN THE AREA OF STRONGEST TRADES...THE SWELLS 
WILL MIX WITH SHORTER PERIOD NE SWELL. 

ELY WINDS OVER THE WESTERN CARIBBEAN ARE FUNNELING THROUGH THE 
CENTRAL AMERICA PASSES BRINGING 20 KT WINDS INTO THE GULF OF 
PAPAGAYO. THESE WINDS WILL PULSE WITH THE STRONGEST WINDS DURING 
THE OVERNIGHT AND EARLY MORNING HOURS WITH THE AID OF NOCTURNAL 
DRAINAGE FLOW OFF THE MOUNTAINOUS TERRAIN. 

$$
AL