000
AXPZ20 KNHC 120913
TWDEP 

TROPICAL WEATHER DISCUSSION  
NWS NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC FRI AUG 12 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 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0900 UTC.

...ITCZ/MONSOON TROUGH...
MONSOON TROUGH 11N86W 9N95W 14N115W 12N140W. SCATTERED MODERATE 
TO STRONG CONVECTION WITHIN 180 NM N OF AXIS FROM 86W-91W.

...DISCUSSION...
UPPER LEVEL TROUGH ALONG 32N135W TO 26N120W. AN UPPER LEVEL 
RIDGE IS SW OF THE TROUGH. A STATIONARY UPPER LEVEL ANTICYCLONE 
IS OVER THE BORDER OF NE MEXICO AND SW TEXAS NEAR 31N105W WITH 
AN UPPER RIDGE EXTENDING SW OF THE ANTICYCLONIC CIRCULATION TO 
NEAR 17N125W. CONVECTION OVER INTERIOR MEXICO IS DECREASING WITH 
THE DEBRIS MOISTURE SPREADING W OVER THE PACIFIC. THE 
ANTICYCLONE WILL MEANDER ACROSS NORTHERN MEXICO THROUGH SAT.

IN THE DEEP TROPICS AN INVERTED UPPER TROUGH EXTENDS FROM 
16N111W TO 7N108W. UPPER DIFFLUENCE W OF THE TROUGH AXIS IS 
ENHANCING CONVECTION NEAR 10N115W.

AN UPPER LEVEL CYCLONIC CIRCULATION IS OVER THE YUCATAN 
PENINSULA. UPPER LEVEL DIFFLUENT FLOW SE OF THE CYCLONIC 
CIRCULATION IS ENHANCING CONVECTIVE ACTIVITY WITHIN AROUND 150 
NM ALONG THE COASTS FROM GUATEMALA TO COSTA RICA.

SURFACE RIDGE EXTENDS INTO THE DISCUSSION AREA FROM 32N140W SE 
TO NEAR 21N117W. CROSS EQUATORIAL S TO SW SWELL RESULTING IN 
SEAS 8-11 FT S OF 10N BETWEEN 80W-110W. A 1011 MB SURFACE LOW IS 
ANALYZED NEAR 15N119W. SCATTERED MODERATE ISOLATED STRONG 
CONVECTION IS WITHIN 70 NM W SEMICIRCLE OF THE LOW.

$$
DGS