000
AXPZ20 KNHC 300919
TWDEP 

TROPICAL WEATHER DISCUSSION 
NWS NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC SAT JUN 30 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 AXIS FROM 9N84W TO 1010 MB LOW NEAR 8N88W TO 
8N95W. ITCZ AXIS FROM 8N95W TO 4N110W 6N120W 5N140W. SCATTERED 
MODERATE TO STRONG CONVECTION FROM 3N-7N E OF 80W.
 
...DISCUSSION...
UPPER LEVEL TROUGH IN THE NW PORTION OF THE DISCUSSION AREA FROM 
32N135W TO 25N140W. AN UPPER LEVEL ANTICYCLONIC CIRCULATION IS 
OVER NW MEXICO NEAR 30N111W WITH RIDGE EXTENDING FROM THE 
ANTICYCLONE SW TO 26N125W TO 20N140W. ANOTHER ANTICYCLONIC 
CIRCULATION SW OF THE TIP OF THE BAJA PENINSULA NEAR 22N113W.
AN INVERTED UPPER LEVEL TROUGH IS BETWEEN THE SOUTHERN 
ANTICYCLONIC CIRCULATION AND THE RIDGE FROM 25N123W TO 12N131W. 
STRONG SUBSIDENCE WITH DRY/STABLE AIR AT THE MIDDLE AND UPPER 
LEVELS IS ACROSS A LARGE PORTION OF THE AREA N OF 15N W OF 115W. 
IN THE DEEP TROPICS A BROAD CYCLONIC CIRCULATION IS CENTERED 
NEAR 2N106W.

SURFACE HIGH PRES RIDGE FROM 30N130W TO 15N100W. THE RIDGE 
COMBINED WITH LOWER PRES OVER MEXICO IS PROVIDING ENOUGH OF A 
PRES GRADIENT TO SUPPORT NW WINDS 20 KT AND SEAS TO 8 FT ALONG 
THE BAJA CALIFORNIA COAST N OF 29N W TO 117W.

ELY WINDS TO 20 TO 25 KT ARE BLOWING THROUGH THE GULF OF 
PAPAGAYO AND WILL CONTINUE THROUGH THE WEEKEND THEN DECREASE TO 
BELOW 20 KT MON.

$$
DGS