000
AXPZ20 KNHC 112139
TWDEP 

TROPICAL WEATHER DISCUSSION   
NWS NATIONAL HURRICANE CENTER MIAMI FL
2205 UTC SAT JUN 11 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.
 
...SPECIAL FEATURE...
TROPICAL STORM ADRIAN IS CENTERED AT 15.8N 112.9W 1000 MB AT 
11/2100 UTC MOVING W OR 275 DEGREES AT 10 KT. THE MAXIMUM 
SUSTAINED WINDS ARE 45 KT WITH GUSTS TO 55 KT. NUMEROUS STRONG 
CONVECTION PERSISTS WITHIN 45 NM N OF CENTER...SURROUNDED BY 
SCATTERED MODERATE ISOLATED STRONG CONVECTION ELSEWHERE WITHIN 
60 NM OF LOW CENTER. SEE THE LATEST NHC ADVISORY UNDER AWIPS/WMO 
HEADERS MIATCPEP1/WTPZ21 KNHC FOR MORE DETAILS. 

...ITCZ/MONSOON TROUGH...
THE MONSOON TROUGH REMAINS FRAGMENTED AS A RESULT OF TROPICAL 
STORM ADRIAN. ONE FRAGMENT OF THE MONSOON TROUGH EXTENDS FROM 
10N85W TO 09N91W. THE SECOND FRAGMENT EXTENDS FROM 12N115W TO 
06N128W WITH THE INTERTROPICAL CONVERGENCE ZONE EXTENDING FROM 
06N128W TO 06N140W. SCATTERED MODERATE TO ISOLATED STRONG 
CONVECTION WAS NOTED WITHIN 75 NM S OF THE MONSOON TROUGH FROM 
118W TO 124W. 
 
...DISCUSSION...
 
ASIDE FROM TROPICAL STORM ADRIAN...HIGH PRESSURE 1030 MB 
CENTERED NW OF THE AREA NEAR 34N145W WITH RIDGE EXTENDING SE 
INTO THE AREA TO NEAR 23N115W. THE PRESSURE GRADIENT BETWEEN THE 
RIDGE AND A TROUGH OF LOW PRESSURE OVER THE GULF OF CALIFORNIA 
IS SUPPORTING FRESH 20 KT N WINDS N OF 27N BETWEEN 117W AND 129W 
AS DEPICTED BY THE LATEST ASCAT PASS. THE PRESSURE GRADIENT 
BETWEEN THE RIDGE AND TROPICAL STORM ADRIAN AND LOWER PRESSURES 
ASSOCIATED WITH THE MONSOON TROUGH AND ITCZ IS MAINTAINING FRESH 
WINDS FROM 09N TO 26N W OF 130W AND FROM 10N TO 20N BETWEEN 130W 
AND 115W AS DEPICTED BY THE LATEST ASCAT AND WINDSAT PASSES. 

SOUTHERLY CROSS EQUATORIAL S TO SW SWELL EXTENDS NORTHWARD OVER 
MOST OF THE PACIFIC WATERS E OF 130W...MIXING WITH THE CONFUSED 
SEAS SURROUNDING THE TROPICAL CYCLONE. SE CROSS EQUATORIAL SWELL 
IS NOTED OVER THE DEEP TROPICS TO THE W OF 130W...MIXING WITH NE 
SWELL ASSOCIATED WITH THE TRADES SW OF THE LOW LEVEL RIDGE.

$$
AL