619  
AXPZ20 KNHC 201431  
TWDEP  
 
TROPICAL WEATHER DISCUSSION  
NWS NATIONAL HURRICANE CENTER MIAMI FL  
1605 UTC WED AUG 20 2025  
 
TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM  
03.4S TO 30N, EAST OF 120W INCLUDING THE GULF OF CALIFORNIA, AND  
FROM THE EQUATOR TO 30N, BETWEEN 120W AND 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  
1430 UTC.  
   
..TROPICAL WAVES
 
 
THE AXIS OF A TROPICAL WAVE IS NEAR 93W, NORTH OF 03N, MOVING  
WEST AT 10 TO 15 KT. NEARBY CONVECTION IS DESCRIBED BELOW IN THE  
MONSOON TROUGH/ITCZ SECTION.  
 
THE AXIS OF A TROPICAL WAVE IS NEAR 107W, NORTH OF 05N, MOVING  
WEST AT 10 KT. NEARBY CONVECTION IS DESCRIBED BELOW IN THE  
MONSOON TROUGH/ITCZ SECTION.  
 
THE AXIS OF A TROPICAL WAVE IS NEAR 124W, FROM 04N TO 17N,  
MOVING WEST AT 10 TO 15 KT. NEARBY CONVECTION IS DESCRIBED BELOW  
IN THE MONSOON TROUGH/ITCZ SECTION.  
   
..INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH
 
 
THE MONSOON TROUGH EXTENDS FROM 09N85W TO 12N124W TO 11N140W.  
SCATTERED MODERATE AND ISOLATED STRONG CONVECTION NOTED FROM 04N  
TO 08N EAST OF 84W, FROM 07N TO 15N BETWEEN 97W AND 130W, AND  
FROM 05N TO 10N BETWEEN 130W AND 140W.  
   
..OFFSHORE WATERS WITHIN 250 NM OF MEXICO
 
 
A RIDGING EXTENDS FROM 1023 MB HIGH PRESSURE CENTERED NEAR  
31N131W TO REVILLAGIGEDO ISLANDS, WITH A SURFACE TROUGH OVER THE  
GULF OF CALIFORNIA. THIS PATTERN IS SUPPORTING GENTLE TO  
MODERATE NW BREEZES AND MODERATE SEAS OFF BAJA CALIFORNIA.  
MODERATE GAP WINDS, AND SEAS OF 5-6 FT, PREVAIL ACROSS THE GULF  
OF TEHUANTEPEC. LIGHT TO GENTLE BREEZES AND SLIGHT SEAS ARE NOTED  
ELSEWHERE OFF SOUTHERN MEXICO. GENTLE WINDS AND SLIGHT SEAS ARE  
OVER THE GULF OF CALIFORNIA.  
 
FOR THE FORECAST, THE PRESSURE GRADIENT BETWEEN A RIDGE WEST OF THE  
BAJA CALIFORNIA PENINSULA AND A TROUGH OVER THE GULF OF  
CALIFORNIA WILL SUPPORT GENTLE TO MODERATE NW WINDS WITH  
MODERATE SEAS WEST OF THE BAJA PENINSULA THROUGH THE WEEKEND.  
LIGHT TO GENTLE WINDS AND MODERATE SEAS IN SW SWELL WILL PERSIST  
ACROSS THE REMAINDER OF THE MEXICAN OFFSHORE WATERS.  
 
...OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA,  
AND WITHIN 750 NM OF ECUADOR...  
 
LIGHT TO GENTLE WINDS DOMINATE THE OFFSHORE WATERS NORTH OF 05N  
WHILE GENTLE TO MODERATE WINDS ARE NOTED SOUTH OF 05N. MODERATE  
SEAS PREVAIL ACROSS THE DISCUSSION WATERS.  
 
FOR THE FORECAST, LIGHT TO GENTLE WINDS WILL PREVAIL ACROSS THE  
WATERS NORTH OF 05N THROUGH THE WEEKEND, EXCEPT FOR MODERATE  
WINDS PULSING IN THE GULF OF PAPAGAYO AT NIGHT STARTING THU.  
GENTLE TO MODERATE WINDS ARE EXPECTED SOUTH OF 05N. CROSS-  
EQUATORIAL SOUTHERLY SWELL WILL PROPAGATE ACROSS THE REGIONAL  
WATERS, KEEPING SEAS IN THE MODERATE RANGE THROUGH FRI, EXCEPT IN  
THE LEE OF THE GALAPAGOS ISLANDS WHERE SLIGHT SEAS ARE EXPECTED.  
ANOTHER ROUND OF LARGE SWELL WILL MOVE INTO THE WATERS OFF  
ECUADOR AND COLOMBIA BY LATE FRI, AND REACH THE OFFSHORE WATERS  
OF CENTRAL AMERICA BY SUN.  
   
..REMAINDER OF THE AREA
 
 
HIGH PRESSURE PREVAILS NORTH OF 20N, ANCHORED BY A 1023 MB HIGH  
CENTERED NEAR 31N131W. THE PRESSURE GRADIENT BETWEEN THIS AREA  
OF HIGH PRESSURE ALONG WITH LOWER PRESSURE WITHIN THE MONSOON  
TROUGH IS SUPPORTING MODERATE TO LOCALLY FRESH TRADE WINDS NORTH  
OF THE MONSOON TROUGH TO 23N AND WEST OF 122W. SEAS OVER THESE  
WATERS ARE IN THE 6-7 FT RANGE. GENTLE WINDS, AND SEAS OF 4-7 FT,  
PREVAIL ELSEWHERE NORTH OF THE MONSOON TROUGH. GENTLE TO  
MODERATE WINDS, AND COMBINED SEAS OF 5-8 FT IN SOUTHERLY SWELL,  
PREVAIL SOUTH OF THE MONSOON TROUGH.  
 
FOR THE FORECAST, THE RIDGE WILL REMAIN IN PLACE THROUGH THE  
END OF THE WEEK. THE FRESHENING WINDS IN THE TRADEWIND ZONE N OF  
THE MONSOON TROUGH WILL INCREASE SEAS TO 8 FT OVER THESE WATERS  
BY TONIGHT. LITTLE CHANGE IS EXPECTED ELSEWHERE.  
 

 
AL  
 
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