000
AXPZ20 KNHC 202127
TWDEP 

TROPICAL WEATHER DISCUSSION                                    
NWS NATIONAL HURRICANE CENTER MIAMI FL                           
2205 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 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
2100 UTC.

...TROPICAL WAVES...                                            
WEAK TROPICAL WAVE FROM 19N114W TO 13N118W MOVING W ABOUT 10 KT. 
ISOLATED SHOWERS ARE NOTED NEAR THE WAVE AXIS.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...        
MONSOON TROUGH EXTENDS FROM 09N78W TO 09N84W TO 10N100W TO 
08N110W TO 11N127W. ITCZ AXIS CONTINUES FROM 11N127W TO BEYOND 
11N140W. SCATTERED MODERATE TO ISOLATED STRONG CONVECTION IS 
NOTED FROM 06N TO 10N E OF 90W...FROM 06N TO 13N BETWEEN 95W AND 
105W...WITHIN 90 NM S OF TROUGH BETWEEN 107W AND 110W...WITHIN 
120 NM N OF TROUGH BETWEEN 121W AND 123W AND FROM 08N TO 11N W 
OF 137W. 

...DISCUSSION...                                             
ALOFT...UPPER LEVEL CYCLONIC CIRCULATION CENTERED OVER BAJA 
PENINSULA NEAR 28N113W CONTINUES TO TRIGGER SOME SHOWER AND TSTM 
ACTIVITY MAINLY FROM 27N TO 29N. ABUNDANT DEEP LEVEL TROPICAL 
MOISTURE COVERS MOST OF MEXICO AND ACROSS CENTRAL AMERICA. AN 
ANTICYCLONE CENTER NEAR 15N136W DOMINATES THE WEST-CENTRAL 
WATERS. AN UPPER LEVEL TROUGH EXTENDS ALONG 30N128W TO 23N128W 
TO 15N130W. MODERATE TO STRONG SUBSIDENCE IS NOTED ACROSS MUCH 
OF THE AREA N OF 15N W OF 128W. ANOTHER ANTICYCLONE CENTERED 
ALONG THE COAST OF MEXICO NEAR 23N106W EXTENDS A RIDGE S TO NEAR 
09N105W. EASTERLY WINDS ALOFT COVERS MOST OF THE AREA N OF 05N E 
OF 110W. THESE WINDS ARE TRANSPORTING DEBRIS CLOUDINESS FROM 
CONVECTION ALONG AND NEAR THE MONSOON TROUGH. 

SURFACE RIDGE ASSOCIATED WITH SUBTROPICAL HIGH N OF THE AREA 
EXTENDS N OF 18N W OF 120W. TRADE WINDS OF 15-20 KT S OF THE 
RIDGE ARE PRODUCING AN AREA OF 7-8 FT SEAS W OF 135W. GALE FORCE 
N WINDS ALONG THE COAST OF NORTHERN CALIFORNIA WILL INCREASE 
SEAS TO 8-9 FT N OF 28N BETWEEN 124W AND 132W THROUGH AT LEAST 
MON.

$$ 
GR