000
AXPZ20 KNHC 290920
TWDEP 

TROPICAL WEATHER DISCUSSION 
NWS NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC FRI JUN 29 2012

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 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0900 UTC.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH FROM 6N77W TO 7N95W. ITCZ FROM 7N95W 9N15W TO 
6140W. SCATTERED MODERATE ISOLATED STRONG CONVECTION WITHIN 60 
NM EITHER S OF AXIS FROM 117W-122W.
 
...DISCUSSION...
UPPER LEVEL TROUGH IN THE NW PORTION OF THE DISCUSSION AREA FROM 
32N130W TO 25N140W...WITH AN UPPER LEVEL RIDGE NW OF THE TROUGH.
AN UPPER LEVEL ANTICYCLONIC CIRCULATION IS OFF THE W COAST OF 
BAJA CALIFORNIA NEAR 29N117W WITH RIDGE EXTENDING FROM THE 
ANTICYCLONE SW TO 19N140W. AN INVERTED UPPER LEVEL TROUGH IS E 
OF THE ANTICYCLONIC CIRCULATION FROM SOUTHERN BAJA CALIFORNIA 
FROM 26N110W TO 10N123W. STRONG SUBSIDENCE WITH DRY/STABLE AIR 
AT THE MIDDLE AND UPPER LEVELS IS ACROSS A LARGE PORTION OF THE 
AREA N OF 12N W OF 115W. AN UPPER LEVEL ANTICYCLONIC CIRCULATION 
OVER THE WESTERN GULF OF MEXICO WITH RIDGE ACROSS CENTRAL MEXICO.

SURFICE HIGH PRES...1023 MB...IS CENTERED NEAR 31N129W WITH 
RIDGE FROM THE HIGH TO 20N115W. THERE IS ENOUGH OF A GRADIENT TO 
SUPPORT NE WINDS TO 20 KT AND SEAS TO 8 FT FROM 8N-12N W OF 
130W. THE HIGH WEAKENS AND WINDS DECREASE TO LESS THAN 20 KT 
THIS EVENING.

ELY WINDS TO 20 KT ARE EXPECTED THROUGH THE GULF OF PAPGAYO THIS 
EVENING AND CONTINUE THROUGH THE WEEKEND. 

$$
DGS