000
AXPZ20 KNHC 261517
TWDEP 

TROPICAL WEATHER DISCUSSION 
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC SUN OCT 26 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 1430 UTC.

...THE ITCZ...
08N77W TO 07N94W TO 11N113W TO 10N126W TO 13N132W TO 10N140W. 
SCATTERED MODERATE SHOWERS TO ISOLATED STRONG THUNDERSTORMS ARE
WITHIN 60 NM TO 90 NM ON EITHER SIDE OF 05N78W 07N87W...AND 
08N93W 08N104W 10N117W 10N124W. WARMING CLOUD TOP TEMPERATURES 
AND DISSIPATING BUT STILL LINGERING CONVECTIVE PRECIPITATION
FROM 11N TO 12N BETWEEN 92W AND 94W.

...DISCUSSION...
A MIDDLE TO UPPER LEVEL TROUGH EXTENDS FROM A LARGE AND 
WELL-DEFINED MIDDLE/UPPER LEVEL CYCLONIC CIRCULATION CENTER
NEAR 32N135W TO 22N138W. DRY AIR IN SUBSIDENCE IS WITHIN
280 NM TO 450 NM IN THE SOUTHERN SEMICIRCLE.

AN UPPER LEVEL RIDGE EXTENDS FROM AN ANTICYCLONIC CIRCULATION 
CENTER NEAR 12N128W TO 20N127W BEYOND 32N127W.

A MIDDLE TO UPPER LEVEL TROUGH STARTS IN NORTHWESTERN COASTAL
MEXICO NEAR 27N109W INTO THE EASTERN PACIFIC OCEAN NEAR 21N109W
TO 17N113W AND 13N115W. THIS TROUGH IS SURROUNDED BY DRY AIR IN 
SUBSIDENCE WITHIN AT LEAST 540 NM TO THE WEST OF THE TROUGH.

BROAD UPPER LEVEL ANTICYCLONIC FLOW COVERS THE AREA FROM 10N TO
20N BETWEEN 82W AND 100W...IN CENTRAL AMERICA FROM NICARAGUA
TO THE YUCATAN PENINSULA.

A 1012 MB SURFACE LOW PRESSURE CENTER...THE REMNANTS OF TROPICAL 
DEPRESSION SIXTEEN-E...IS NEAR 16.5N 112W. ISOLATED MODERATE 
SHOWERS ARE FROM 17N TO 19N BETWEEN 109W AND 112W.

A 1011 MB LOW PRESSURE CENTER IS NEAR 13.5N 135W. STRONG SHOWERS 
AND THUNDERSTORMS IN INDIVIDUAL CELLS ARE WITHIN A 15 NM TO
30 NM RADIUS OF 14.5N133W AND 12.5N 134.5W.

$$
MT