000
AXPZ20 KNHC 101528
TWDEP 

TROPICAL WEATHER DISCUSSION                                      
NWS NATIONAL HURRICANE CENTER MIAMI FL                           
1605 UTC WED JUL 10 2013

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.

...TROPICAL WAVES...

A TROPICAL WAVE IS ANALYZED OVER SOUTHERN MEXICO N OF 10N ALONG 
95W MOVING E OF THE GULF OF TEHUANTEPEC. THIS HAS BEEN 
INCREASING THE PRESSURE GRADIENT ACROSS THE GULF OF TEHUANTEPEC 
ALLOWING MODERATE TO FRESH NORTHERLY GAP FLOW INTO THE GULF OF 
TEHUANTEPEC WITH SEAS TO 8 FT. THE WAVE WILL PASS W OF THE GULF 
OF TEHUANTEPEC AND WEAKEN WITH THE WINDS TO DIMINISHING AND SEAS 
WILL SUBSIDE ACCORDINGLY THROUGH LATE TODAY.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...   
     
MONSOON TROUGH FROM 10N85W TO 8N100W TO 9N110W TO 7N116W. ITCZ 
FROM 7N116W TO 6N120W TO 9N140W. NUMEROUS STRONG FROM 3N-7N E OF 
82W. SCATTERED MODERATE TO STRONG WITHIN 360 NM N OF AXIS FROM 
96W-100W. SCATTERED MODERATE ISOLATED STRONG FROM 8N-12N BETWEEN 
110W-120W. 

...DISCUSSION... 

AN UPPER LEVEL ANTICYCLONIC CIRCULATION IS CENTERED NEAR 24N128W 
WITH NE TO SW RIDGE EXTENDING FROM 29N123W THROUGH THE 
ANTICYCLONE TO 22N140W. AN UPPER LEVEL TROUGH IS NW OF THE 
RIDGE. MODERATE TO STRONG SUBSIDENCE WITH DRY AND STABLE AIR AT 
THE MIDDLE AND UPPER LEVELS IS N OF 17N W OF 120W. AN INVERTED 
UPPER LEVEL TROUGH EXTENDS FROM A CYCLONIC CIRCULATION CENTERED 
NEAR 24N123W N TO 29N122W. ANOTHER ANTICYCLONE IS OVER NICARAGUA 
WITH RIDGE FROM THE ANTICYCLONE TO 10N105W. WITH UPPER LEVEL 
DIFFLUENT FLOW ENHANCING CONVECTION FROM 7N-14N BETWEEN 96W-100W.

SW CROSS EQUATORIAL SWELL TO 9 FT IS S OF 12N BETWEEN 80W-110W 
WILL SUBSIDE TO LESS THAN 8 FT TONIGHT. SURFACE RIDGE IS N OF 
15N W OF 120W. NE TRADES TO 20 KT WITH SEAS TO 9 FT ARE ALONG 
THE SOUTHERN PERIPHERY OF THE RIDGE FROM 13N-18N W OF 135W. 
WINDS WILL DECREASE TO LESS THAN 20 KT AND SEAS LESS THAN 8 FT 
THU.
 
$$ 
DGS