000
AXPZ20 KNHC 231519
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC TUE NOV 23 2010

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

BASED ON 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
1500 UTC.

...ITCZ...
AXIS IS ALONG 9N84W 8N90W 11N130W 8N140W. SCATTERED MODERATE 
CONVECTION WITHIN 60 NM S OF AXIS FROM 90W-107W. SCATTERED 
MODERATE TO STRONG CONVECTION WITHIN 180 NM S OF AXIS FROM 
130W-133W AND WITHIN 60 NM EITHER SIDE OF LINE FROM 12N117W 
13N127W TO 15N131W.

...DISCUSSION...
UPPER LEVEL TROUGH IS ENTERING THE FAR NW PORTION OF THE 
DISCUSSION AREA WITH AXIS FROM 32N136W TO 20N140W. OTHERWISE
A BROAD FLAT UPPER LEVEL RIDGE COVERS THE REMAINDER OF THE AREA 
N OF 10N.  A 90 KT JET STREAM EXTENDS FROM 23N133W TO 30N122W TO 
NORTHERN BAJA CALIFORNIA. THE SW FLOW ALONG AND S OF THE JET IS 
ADVECTING ITCZ MOISTURE NE TOWARD NORTHERN BAJA CALIFORNIA.
IN THE DEEP TROPICS AN UPPER LEVEL CYCLONIC CIRCULATION IS 
CENTERED NEAR 4N111W. MODERATE TO STRONG SUBSIDENCE WITH DRY AND 
STABLE AIR AT THE MIDDLE AND UPPER LEVELS IS S OF THE ITCZ W OF 
80W.

LARGE NLY SWELLS TO 12 FT ARE NOTED N OF 14N W OF 120W. STRONG 
HIGH PRES BUILDING ACROSS THE NW PORTION OF THE AREA THIGHTENING 
THE PRES GRADIENT WITH INCREASED TRADES FROM 12N TO 20N W OF 
120W. SURFACE TROUGH EXTENDS FROM 18N135W TO 1011 MB LOW PRES 
NEAR 10N134W TO 3N133W. SCATTERED SHOWERS AND TSTMS ARE WITHIN 
180 NM SW OF THE LOW PRES CENTER.

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. 

$$
DGS