000
AXPZ20 KNHC 180348
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
0405 UTC MON OCT 18 2010

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

BASED ON 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0300 UTC.

...ITCZ...
THE ITCZ AXIS FROM 08N78W TO 08N110W TO 10N120W TO 10N140W. 
ISOLATED MODERATE CONVECTION IS WITHIN 60 NM EITHER SIDE OF AXIS 
E OF 95W...AND BETWEEN 111W AND 121W. SCATTERED MODERATE 
CONVECTION IS FROM 13N TO 15N BETWEEN 131W AND 135W.  

...DISCUSSION...
ALOFT...
A LARGE UPPER LEVEL ANTICYCLONE CENTERED NEAR 18N118W COVERS THE 
DISCUSSION AREA N OF 10N BETWEEN 110W AND 140W. A 70-80 KT JET 
STREAM IS N OF 27N E OF 130W TO BAJA CALIFORNIA. AN UPPER LEVEL 
TROUGH EXTENDS S FROM S TEXAS AT 30N100W TO A BASE S OF MEXICO 
AT 15N105W PRODUCING STRONG SUBSIDENCE. AN UPPER LEVEL RIDGE IS 
OVER THE TROPICAL EASTERN PACIFIC WITH AXIS FROM ECUADOR TO EL 
SALVADOR PRODUCING ABUNDANT UPPER LEVEL MOISTURE E OF 95W. 

SURFACE...
MONSOON TROUGH EVIDENT E OF 90W IN THE ERN PORTION OF THE 
DISCUSSION AREA PRODUCING 15 TO 20 KT SW WINDS. FURTHER W...A 
WEAK TROUGH EXTENDS FROM 13N133W TO 09N136W...AND HAS NE TO E 
WINDS TO 20 KT N OF THE TROUGH AXIS AND SEAS TO 8 FT. OTHERWISE 
A BROAD HIGH PRES RIDGE DOMINATES NW PORTION OF AREA.
  
$$
FORMOSA