000
AXPZ20 KNHC 212118
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
2205 UTC SUN NOV 21 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 07N106W TO 10N122W TO 09N140W. NO 
SIGNIFICANT CONVECTION.

...DISCUSSION...

STRONG HIGH PRESSURE 1036 MB CENTERED NEAR 46N148W WITH RIDGE 
EXTENDING TO 22N114W HAS TIGHTENED THE PRESSURE GRADIENT ACROSS 
THE WESTERN PART OF THE AREA AND HAVE FRESHENED THE TRADES FROM 
12N TO 20N W OF 133W. THE HIGH PRESSURE CENTER WILL SHIFT SE 
OVER THE NEXT 24 HOURS...EXPANDING THE AREA OF FRESH TRADES. 
THIS WILL ALSO PRODUCE FRESH NW WINDS OFF THE WEST COAST OF BAJA 
CALIFORNIA. LARGE NLY SWELLS TO 11 FT ARE PROPAGATING ACROSS THE 
WESTERN PORTION OF THE AREA W OF 116W. 

GAP WINDS
20 KT WINDS OVER THE GULF OF TEHUANTEPEC ARE FORECAST TO 
GRADUALLY WEAKEN OVER THE NEXT 24 HOURS TO LESS THAN 20 KT BY 
MON EVENING.

FRESH TO STRONG ELY WINDS OVER THE WESTERN CARIBBEAN ARE 
FUNNELING THROUGH THE CENTRAL AMERICA PASSES BRINGING FRESH 
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