000
AXPZ20 KNHC 311007
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC WED OCT 31 2007

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

BASED ON 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY
THROUGH 0900 UTC.

...ITCZ...

10N85W 6N98W 11N121W 9N140W. SCATTERED MODERATE TO STRONG
SHOWERS/THUNDERSTORMS WITHIN 20 NM TO 30 NM RADIUS OF 9N116W...
8N127W...7.5N129W...9.5N126W...AND 12.5N131W...AND FROM 13N TO
14N BETWEEN 132W AND 134W.

...DISCUSSION...

A MIDDLE TO UPPER LEVEL TROUGH EXTENDS FROM 30N134W TO 27N135W
AND BEYOND 25N140W. A SURFACE TROUGH IS ALONG 133W FROM 10N TO 
16N. AN UPPER LEVEL RIDGE IS JUST WEST OF THE AREA FROM 11N144W 
TO 19N143W.

AN UPPER LEVEL RIDGE EXTENDS FROM SOUTHWESTERN GUATEMALA TO
20N109W TO 24N108W AT THE MEXICO COAST. MIDDLE TO UPPER LEVEL 
DRY AIR/SUBSIDENCE ACCOMPANIES THIS RIDGE.

A MIDDLE TO UPPER LEVEL TROUGH IS ALONG 23N112W TO A POSSIBLE
CYCLONIC CIRCULATION CENTER NEAR 18N115W...TO 11N119W. AN UPPER 
LEVEL RIDGE IS IMMEDIATELY TO THE WEST OF THIS TROUGH...FROM
13N122W TO 22N122W TO 29N122W.

STRONG NORTHERLY WIND FLOW IN THE GULF OF MEXICO CONTINUES TO 
PRODUCE GALE CONDITIONS IN THE GULF OF TEHUANTEPEC...BUT THESE 
WINDS ARE EXPECTED TO DROP BELOW 35 KT WITHIN 6 HRS ON
WEDNESDAY MORNING.

$$
MT