000
AXPZ20 KNHC 180922
TWDEP 

TROPICAL WEATHER DISCUSSION                                    
NWS NATIONAL HURRICANE CENTER MIAMI FL                         
1005 UTC THU JUN 18 2015

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. 

...TROPICAL WAVES...

TROPICAL WAVE N OF 8N ALONG 95W/96. NUMEROUS STRONG CONVECTION 
IN THE GULF OF TEHUANTEPEC BETWEEN 93W-97W.  

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...

ITCZ FROM 10N86W TO 8N110W TO 1N130W TO 2N140W. NUMEROUS 
MODERATE TO STRONG CONVECTION FROM 3N-10N BETWEEN 83W-87W AND IN 
THE GULF OF TEHUANTEPEC. SCATTERED MODERATE TO STRONG CONVECTION 
FROM 2N-9N BETWEEN 111W-124W.

...DISCUSSION... 

AN UPPER LEVEL RIDGE EXTENDS FROM NORTHERN BAJA CALIFORNIA TO AN 
ANTICYCLONIC CIRCULATION NEAR 28N122W TO ANOTHER ANTICYCLONIC 
CIRCULATION AT 26N129W TO 25N140W. DOWNSTREAM UPPER LEVEL TROUGH 
EXTENDS FROM NORTHERN MEXICO TO SOUTHERN BAJA CALIFORNIA TO 
23N121W. AN ELONGATED UPPER RIDGE IS FROM CENTRAL MEXICO TO 
16N118W. STRONG SUBSIDENCE WITH DRY AIR AT THE MIDDLE AND UPPER 
LEVELS IS N OF 15N W OF 110W. IN THE DEEP TROPICS AN UPPER LEVEL 
CYCLONIC CIRCULATION IS CENTERED NEAR 8N131W. UPPER LEVEL 
DIFFLUENCE IS ENHANCING CONVECTION FROM 3N-10N BETWEEN 83W-87W.

SURFACE HIGH PRESSURE RIDGE EXTENDS SE INTO THE AREA NEAR 
32N132W TO 18N111W. THE PRESSURE GRADIENT BETWEEN THE RIDGE AND 
LOWER PRESSURE IN THE VICINITY OF THE ITCZ IS MAINTAINING GENTLE 
TO MODERATE TRADES OVER THE WESTERN PORTION OF THE AREA N OF THE 
ITCZ TO 15N AND W OF 130W. SE SWELL TO 8 FT IS FROM 10N-15N W OF 
135W WILL SUBSIDE TO BELOW 8 FT THU NIGHT.

CROSS EQUATORIAL SE SWELLS 8 TO 10 FT S OF 5N BETWEEN 100W-120W 
WILL SUBSIDE TO 8 FT TONIGHT.

ELY WINDS 20-25 KT WILL INCREASE THROUGH THE GULF OF PAPAGAYO. 
TONIGHT.
 
$$
DGS