000
AXPZ20 KNHC 200919
TWDEP 

TROPICAL WEATHER DISCUSSION                                    
NWS NATIONAL HURRICANE CENTER MIAMI FL                           
1005 UTC SAT JUL 20 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 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0900 UTC.

...TROPICAL WAVES...                                            
TROPICAL WAVE EXTENDS FROM 19N111W TO 13N115W MOVING W ABOUT 10 
KT. ISOLATED SHOWERS ARE NOTED NEAR THE WAVE AXIS.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...        
MONSOON TROUGH FROM 8N84W TO 7N105W TO 14N120W TO 12N130W. ITCZ 
FROM 12N130W TO 9N140W. SCATTERED MODERATE TO ISOLATED STRONG 
CONVECTION WITHIN 50 NM S OF AXIS FROM 89W-93W AND WITHIN 60 NM 
N OF AXIS FROM 93W-95W. 

...DISCUSSION...                                          
WEAK UPPER LEVEL TROUGH OVER THE NW PORTION OF THE DISCUSSION 
AREA EXTENDS FROM 31N128W TO 18N131W. EXCEPT FOR SOME HIGH LEVEL 
MOISTURE N OF 24N W OF 135W MODERATE TO STRONG SUBSIDENCE WITH 
DRY/STABLE AIR AT THE MIDDLE AND UPPER LEVELS IS N OF 15N W OF 
120W. DOWNSTREAM UPPER LEVEL RIDGE EXTENDS FROM AN ANTICYCLONIC 
CIRCULATION NEAR 20N123W TO ANOTHER ANTICYCLONIC CIRCULATION 
OVER THE CENTRAL GULF OF CALIFORNIA NEAR 28N113W. AN UPPER 
LEVEL CYCLONIC CIRCULATION OFF THE W COAST OF MEXICO NEAR 
23N107W. ABUNDANT DEEP LEVEL TROPICAL MOISTURE COVERS ALL OF 
MEXICO AND S INTO CENTRAL AMERICA.

SURFACE RIDGE COVERS THE AREA N OF 18N W OF 125W. A SMALL AREA 
OF ELY 20 KT WINDS ALONG THE SOUTHERN PERIPHERY OF THE RIDGE 
FROM 12N-16N W OF 137W...WITH SEAS TO 8. WINDS WILL DECREASE TO 
LESS THAN 20 KT AND SEAS LESS THAN 8 FT TONIGHT.

AN AREA OF NLY SWELL IS FORECAST TO MOVE INTO THE AREA N OF 28N 
BETWEEN 123W-130W TONIGHT.

$$ 
DGS