000
AXPZ20 KNHC 131555
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC MON OCT 13 2008

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 
1545 UTC.

...TROPICAL LOWS...

LOW PRESSURE...REMNANTS OF ODILE...IS CENTERED NEAR 19N108W 1008 
MB. ONLY A FEW SHOWERS OCCASIONALLY FLARE E OF THE CENTER.

LOW PRESSURE IS NEARLY STATIONARY NEAR 12N123W 1010 MB. 
SCATTERED MODERATE ISOLATED STRONG CONVECTION IS NOTED WITHIN 30 
NM OF 11N124W.

...TROPICAL WAVE...

A TROPICAL WAVE IS N OF 7N ALONG 96W MOVING W 10 KT. SCATTERED 
MODERATE ISOLATED STRONG CONVECTION IS NOTED WITHIN 60 NM EITHER 
SIDE OF THE WAVE AXIS AT 13N.

...ITCZ...

THE ITCZ AXIS EXTENDS ALONG 10N FROM THE COAST OF COSTA RICA TO 
105W WHERE IT DIPS S TO 09N115W THEN CONTINUES W-NW INTO THE LOW 
PRESSURE AT 12N123W...THEN CONTINUES W FROM THE WAVE AXIS 
FLUCTUATING BETWEEN 07N AND 09N TO BEYOND 140W. SCATTERED 
MODERATE ISOLATED STRONG CONVECTION IS NOTED FROM 05.5N TO 11N 
BETWEEN 85W AND 134W.

...DISCUSSION...

AN UPPER CYCLONE IS FILLING JUST W OF THE DISCUSSION AREA NEAR 
33N144W AND APPEARS TO BE LIFTING SLOWLY N. ALTHOUGH CONVECTION 
HAS DISSIPATED...SOME DEBRIS MOISTURE IS STILL NOTED N OF 29N W 
OF 129W BUT IS EVAPORATING. AN UPPER LEVEL ANTICYCLONE IS 
QUASI-STATIONARY OVER SW TEXAS NEAR 29N99W...WITH A RIDGE AXIS 
EXTENDING SW ACROSS OLD MEXICO INTO THE PACIFIC ALONG 20N110W TO 
A CREST DEEP IN THE TROPICAL PACIFIC NEAR 10N129W. SOME DEBRIS 
MOISTURE ORIGINATING FROM FORMER TROPICAL CYCLONE ODILE IS STILL 
NOTED FROM 16N TO 25N BETWEEN 105W AND 110W. OTHERWISE...THE 
UPPER LEVELS APPEAR VERY DRY W OF A LINE FROM 30N104W TO 15N117W 
TO 10N133W.

AN UPPER CYCLONE OVER THE GULF OF MEXICO NEAR 21N92W IS MOVING W 
WITH TIME. UPPER DIFFLUENCE OVER ITS E SEMICIRCLE IS ENHANCING 
CONVECTION OVER THE W CARIBBEAN WHERE BROAD LOW PRESSURE IS 
FOUND IN LOWER LEVELS. DEBRIS MOISTURE FROM THIS 
CONVECTION...AND FROM E PACIFIC ITCZ CONVECTION BETWEEN 83W AND 
93W...IS NOW LIFTING N AND COVERING THE UPPER LEVELS FROM 05N TO 
25N BETWEEN 77W AND 90W. THE REMAINDER OF THE TROPICAL E PACIFIC 
IS CHARACTERIZED BY STRONG NE WINDS ALOFT...SPREADING ITCZ 
DEBRIS MOISTURE S TO THE EQUATOR BETWEEN 88W AND 110W. 

AT THE LOW LEVELS...A RIDGE EXTENDS ALONG 32N132W TO 18N112W. 
BROKEN TO LOCALLY OVERCAST STRATOCUMULUS CLOUDS ARE NOTED 
GENERALLY SW OF THE RIDGE AXIS...ROUGHLY WITHIN 420 NM EITHER 
SIDE OF LINE 18N115W TO 30N140W. 

$$
NELSON