000
AXPZ20 KNHC 121534
TWDEP 

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

...ITCZ/MONSOON TROUGH...

MONSOON TROUGH EXTENDS FROM 11N86W TO 09N97W TO 13N114W TO A 
1011 MB LOW NEAR 14N120W TO 11N132W WHERE THE ITCZ BEGINS AND 
CONTINUES TO BEYOND 11N140W. SCATTERED MODERATE ISOLATED STRONG 
CONVECTION IS LOCATED WITHIN 180 NM S OF THE MONSOON TROUGH AXIS 
BETWEEN 86W AND 91W AND FROM 06N TO 10N BETWEEN 101W AND 107W. 
SIMILAR ACTIVITY IS LOCATED N OF 03N E OF 80W AND WITHIN 30 NM 
OF A LINE EXTENDING FROM 05N82W TO 07N84W. 

...DISCUSSION...

W OF 105W...
AN AREA OF RELATIVELY STRONG SOUTHWESTERLY WINDS ALOFT COVERS 
THE NW PART OF THE DISCUSSION AREA N OF 25N W OF 132W WITH 
SATELLITE CLOUD DRIFT WINDS INDICATING SPEEDS OF UP TO 50 KT. A 
LARGE ELONGATED MIDDLE/UPPER LEVEL CYCLONIC CIRCULATION IS 
CENTERED IN THE VICINITY OF 24N122W AND IS NEARLY STATIONARY. 
THIS FEATURE COVERS THE AREA N OF 20N BETWEEN 118W AND 128W. 
OVER THE TROPICS A LARGE AREA OF MODERATE EASTERLY WINDS ALOFT 
IS LOCATED S OF ABOUT 15N TO THE EQUATOR. THE LATEST WATER VAPOR 
IMAGERY INDICATES A MIDDLE/UPPER LEVEL CYCLONIC CIRCULATION 
DEVELOPING NEAR 15N113W AND MOVING W 10 TO 15 KT. AT THE SURFACE 
A 1011 MB LOW IS LOCATED NEAR 13N120W AND IS MOVING W AT 10 KT. 
WITHIN 120 NM NW QUADRANT OF THE LOW WINDS ARE 20 KT WITH SEAS 
TO 8 FT. ALSO SCATTERED MODERATE ISOLATED STRONG CONVECTION IS 
LOCATED WITHIN 45 NM EITHER SIDE OF A LINE FROM 14N120W TO 
14N124W. A 1026 MB HIGH IS CENTERED NEAR 35N140W WITH A RIDGE 
AXIS EXTENDING SE TO NEAR 22N120W. 

E OF 105W...
MODERATE EASTERLY WINDS ALOFT ARE LOCATED OVER THE ENTIRE AREA E 
OF 105W WITH WINDS AS HIGH AS 30 KT. SCATTERED STRONG CONVECTION 
IS LOCATED N OF 13N BETWEEN 94W AND 96W AND AND WITHIN 30 NM OF 
12N94W.

$$
CAB