000
AXPZ20 KNHC 292115
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
2205 UTC MON AUG 29 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 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
2100 UTC.

...ITCZ/MONSOON TROUGH...
MONSOON TROUGH 12N87W TO 1009 MB LOW 18N125W TO 12N130W TO 
11N140W. SCATTERED MODERATE WITHIN 200 NM S OF AXIS FROM 90W-94W.
SCATTERED MODERATE TO STRONG WITHIN 240 NM S OF AXIS FROM 
101W-106W.

...DISCUSSION...
AN UPPER LEVEL ANTICYCLONIC CIRCULATION CENTERED NEAR 17N131W. 
MODERATE TO STRONG SUBSIDENCE WITH DRY STABLE AIR AT THE MIDDLE 
AND UPPER LEVELS OF THE ATMOSPHERE COVERS THE AREA N OF 10N W OF 
120W. A COL SEPARATES THE ABOVE MENTIONED ANTICYCLONIC 
CIRCULATION FROM ANOTHER UPPER ANTICYCLONIC CIRCULATION OVER 
SOUTHERN NEW MEXICO WITH AN UPPER RIDGE EXTENDING SW ACROSS THE 
NORTHERN BAJA CALIFORNIA PENINSULA TO 25N115W. AN UPPER LEVEL 
CYCLONIC CIRCULATION CENTERED OVER THE NE COAST OF MEXICO 
EXTENDS SW ACROSS CENTRAL MEXICO TO 20N108W. UPPER LEVEL 
DIFFLUENT FLOW IS ENHANCING CONVECTION ALONG THE MONSOON TROUGH 
BETWEEN 101W-106W.

SURFACE HIGH PRESSURE RIDGE WITH AXIS FROM 32N135W TO 26N126W.
A 1009 MB LOW PRES ANALYZED NEAR 18N125W. THE LOW IS FORECAST TO 
MOVE SSW TO NEAR 16N126W. NO SIGNIFICANT WIND OR WEATHER 
ASSOCIATED WITH THE LOW.

SW CROSS EQUATORIAL SWELL WITH SEAS 8 TO 10 FT HAS MOVED INTO 
THE SW PORTION OF THE AREA. THE SWELL WILL SPREAD NE FROM 16N140W
TO THE EQUATOR AT 105W WITH SEAS UP TO 12 FT TUE...AND APPROACH
THE MEXICO COAST WED.

$$
DGS