000
AXPZ20 KNHC 280923
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC WED NOV 26 2008

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...
THE INTERTROPICAL CONVERGENCE ZONE IS ALONG THE LINE...08N78W TO 
05N95W TO 08N140W. SCATTERED MODERATE CONVECTION IS WITHIN 60 NM 
OF THE POINT 08N140W.

...DISCUSSION...
DEEP LAYER TROUGH IS NORTH OF A LINE FROM THE BIG BEND REGION OF 
TEXAS TO 25N110W TO 16N130W TO BEYOND 17N140W. THIS AREA IS DRY 
AND CLOUD FREE IN THE MIDDLE AND UPPER LEVELS IMPLYING MIDDLE 
AND UPPER LEVEL SUBSIDENCE. IN THE LOWER LEVELS SCATTERED TO 
OCCASIONALLY BROKEN STRATOCUMULUS ARE NORTH OF 20N AND OVERCAST 
STRATOCUMULUS ARE OBSERVED SOUTH OF 20N. UPPER LEVEL MOISTURE IS 
ADVECTING OVER MEXICO IN A 300 NM WIDE BAND SOUTH OF THE TROUGH. 
THE TROUGH IS FORECAST TO PERSIST THROUGH 48 HOURS.

REMAINDER OF THE MIDDLE AND UPPER LEVELS IS DOMINATED BY WEAK 
ANTICYCLONIC FLOW. EAST AND SOUTH OF A LINE FROM 24N100W TO 
15N115W TO 05N120W TO 01N140W THE ATMOSPHERE IS DRY AND CLOUD 
FREE IN THE MIDDLE AND UPPER LEVELS EXCEPT FOR WIDELY SCATTERED 
CONVECTION WITHIN THE ITCZ EAST OF 105W WHICH IS PUTTING SOME 
MOISTURE IN THE MIDDLE AND UPPER LEVELS WITHIN 240 NM NORTH OF 
THE ITCZ...HOWEVER THE OVERALL SUBSIDENCE IN THE REGION IS 
DIMINISHING THE CLOUDS AS THEY FLOW NORTHWARD. 

OVERCAST STRATOCUMULUS IS OBSERVED SOUTH OF THE ITCZ EAST OF 
130W.

AT THE SURFACE MODERATE RIDGE IS NORTH OF 10N WEST OF 105W. 
ELSEWHERE AT THE SURFACE BROAD TROUGH IS ANALYZED.

$$
LL