000
AXPZ20 KNHC 120306
TWDEP 

TROPICAL WEATHER DISCUSSION   
NWS NATIONAL HURRICANE CENTER MIAMI FL
0405 UTC SUN JUN 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 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0245 UTC.
 
...SPECIAL FEATURE...
TROPICAL STORM ADRIAN IS CENTERED AT 15.8N 113.9W 1002 MB AT 
12/0300 UTC MOVING W OR 275 DEGREES AT 10 KT. THE MAXIMUM 
SUSTAINED WINDS ARE 40 KT WITH GUSTS TO 50 KT. SCATTERED 
MODERATE CONVECTION WAS NOTED WITHIN 150 NM E QUADRANT OF 
ADRIAN. ADRIAN IS CURRENTLY FORECAST TO WEAKEN INTO A DEPRESSION 
BY SUN MORNING. 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 
10N84W TO 09N90W. THE SECOND FRAGMENT EXTENDS FROM 12N115W TO 
08N120W TO 07N126W TO 05N128W WITH THE INTERTROPICAL CONVERGENCE 
ZONE EXTENDING FROM 05N128W TO 04N140W. SCATTERED MODERATE TO 
ISOLATED STRONG CONVECTION WAS NOTED WITHIN 90 NM S OF THE 
MONSOON TROUGH FROM 116W TO 121W.
 
...DISCUSSION...
 
ASIDE FROM TROPICAL STORM ADRIAN...HIGH PRESSURE 1028 MB 
CENTERED NW OF THE AREA NEAR 33N148W 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 116W AND 
129W. THE PRESSURE GRADIENT BETWEEN THE RIDGE AND LOWER 
PRESSURES ASSOCIATED WITH THE MONSOON TROUGH AND ITCZ IS 
MAINTAINING FRESH WINDS FROM 10N TO 23N W OF 132W. 

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 S OF THE LOW LEVEL RIDGE.

$$
AL