000
AXPZ20 KNHC 291518
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
1605 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 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
1500 UTC.

...ITCZ/MONSOON TROUGH...
MONSOON TROUGH 10N82W TO 18N107W TO LOW PRES 18N123W TO 12N126W 
TO BEYOND 10N140W. SCATTERED MODERATE ISOLATED STRONG WITHIN 45 
NM N AND 210 NM S OF AXIS BETWEEN 88W AND 95W. SCATTERED 
MODERATE FROM 13N TO 20N BETWEEN 97W AND 107W. 

...DISCUSSION...
AN UPPER LEVEL ANTICYCLONIC CIRCULATION CENTERED NEAR 17N130W. 
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 29N121W. UPPER LEVEL 
DIFFLUENT FLOW IS ENHANCING CONVECTION IN THE AREA FROM 11N-13N 
BETWEEN 116W-120W. AN UPPER LEVEL TROUGH EXTENDS FROM THE GULF 
OF MEXICO ACROSS CENTRAL MEXICO TO 18N108W. UPPER LEVEL 
DIFFLUENT FLOW IS ENHANCING CONVECTION ALONG THE MONSOON TROUGH 
BETWEEN 100W-105W.

SURFACE HIGH PRESSURE RIDGE WITH AXIS FROM 32N135W TO 25N120W. A 
1009 MB LOW PRES IS CENTERED NEAR 18N123W IS FORECAST TO 
DISSIPATE BY TUE. NO SIGNIFICANT 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