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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