000
AXPZ20 KNHC 122124
TWDEP 

TROPICAL WEATHER DISCUSSION 
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
2205 UTC FRI DEC 12 2008

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...
THE INTERTROPICAL CONVERGENCE ZONE...ALSO KNOWN AS THE ITCZ...AS 
ALONG THE LINE...05N76W TO 07N105W TO 13N125W TO 07N140W.
SCATTERED MODERATE CONVECTION IS WITHIN 100 NM N OF AXIS FROM 
118W TO 125W. WIDELY SCATTERED MODERATE CONVECTION IS WITHIN 90 
NM EITHER SIDE OF AXIS EAST OF 102W.

...DISCUSSION...

GAP WINDS...
NORTHERLY WINDS OF GALE FORCE CONTINUE TO FUNNEL THROUGH THE 
GULF OF TEHUANTEPEC AND IS FORECAST TO CONTINUE DURING THE NEXT 
24 HOURS. WINDS WILL CONTINUE IN THE 20 TO 25 KNOT RANGE THROUGH 
36 HOURS THEN FALL TO LESS THAN 20 KT.

NE WINDS OF 20 TO 25 KT CONTINUE TO AFFECT THE GULF OF PAPAGAYO 
AND DOWNSTREAM THROUGH 42 HOURS THEN FALL TO LESS THAN 20 KT BY 
MIDDAY SUNDAY.

ELSEWHERE...
LARGE SCALE DEEP LAYER TROUGH AXIS IS ALONG THE LINE THROUGH 
32N118W TO 11N135W TO 11N140W. A WEAKENING CYCLONIC CIRCULATION 
IS CENTERED NEAR 27N132W. WITHIN 480 NM OVER THE EAST QUADRANT 
OF THE CIRCULATION THE MIDDLE AND UPPER LEVELS ARE MOIST BUT 
MOSTLY CLOUD FREE. THE REMAINDER OF THE AREA WEST OF THE TROUGH 
AXIS IS DRY AND CLOUD FREE INT HE MIDDLE AND UPPER LEVELS. EAST 
OF THE TROUGH AXIS A LARGE AREA OF UPPER MOISTURE AND MULTI 
LEVEL OVERCAST CLOUDS ARE FLOWING NORTHEASTWARD OVER MEXICO N OF 
20N EASTWARD TO 105W. SOME ENHANCED CONVECTION IS ALSO NOTED IN 
THE ITCZ REGION EAST OF THE TROUGH AXIS TO 113W.

REMAINDER OF THE AREA IS UNDER WEAK ANTICYCLONIC FLOW.

OVERCAST TO BROKEN STRATOCUMULUS ARE NORTH OF 15N WEST OF 125W 
AND ALSO SOUTH OF THE ITCZ EAST OF 130W.

MODERATE RIDGE IS NORTH OF 20N WEST OF 118W. ELSEWHERE BROAD 
TROUGH IS ANALYZED.

$$
LL