000
AXPZ20 KNHC 270310
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
0405 UTC SAT AUG 27 2011

TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM 
THE EQUATOR TO 32N...EAST OF 140W. THE FOLLOWING INFORMATION IS 
BASED ON SATELLITE IMAGERY...WEATHER OBSERVATIONS...RADAR...AND 
METEOROLOGICAL ANALYSIS.

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

...ITCZ/MONSOON TROUGH...
MONSOON TROUGH 13N89W TO 13N95W TO 18N108W TO LOW PRES 1005 MB 
AT 18N115W TO 10N124W TO 10N140W.  SCATTERED MODERATE WITHIN 120 
NM OF AXIS FROM 95W TO 105W.

...DISCUSSION...
UPPER LEVEL TROUGH EXTEND FROM 32N129W TO 10N120W WITH VERY DRY 
AIR W OF 125W DUE TO MASS CONVERGENCE ALOFT.  LARGE ANTICYCLONIC 
FLOW ACROSS REMAINDER OF BASIN ONLY INTERRUPTED BY WEAK 
ILL-DEFINED MEANDERING TROUGH FROM 19N99W TO 11N119W.  TROUGH 
DOES SUPPORT SURFACE LOW PRES 1005 MB AT 18N115W WHICH IN TURN 
BRINGS STRONG LOW LEVEL MASS CONVERGENCE IN ITS SE SEMICIRCLE. 
SCATTERED MODERATE CONVECTION QUICKLY DIMINISHING AS LOW PRES 
SEPARATES FROM MONSOON TROUGH.  OVERALL SCENARIO NOT CONDUCIVE 
TO TROPICAL DEVELOPMENT AT PRESENT WITH NOTHING IN SIGHT FOR 
DURATION OF FORECAST PERIOD. 

...ELSEWHERE AT THE SURFACE...
STATIONARY HIGH PRES CENTER 1024 MB AT 35N140W EXTEND RIDGE TO 
10N120W EXPECTED TO HELP FILL ABOVE MENTIONED LOW PRES. 

$$
WALLY BARNES