292
AXPZ20 KNHC 190132
TWDEP
TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
0405 UTC WED MAR 18 2026
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 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
0130 UTC.
..SPECIAL FEATURES
GULF OF TEHUANTEPEC GALE WARNING: THE PRESSURE GRADIENT BETWEEN
HIGH PRESSURE ACROSS EASTERN MEXICO AND THE EQUATORIAL TROUGH IS
SUPPORTING STRONG TO NEAR GALE-FORCE N-NE WINDS IN THE GULF OF
TEHUANTEPEC. SEAS ARE 8-10 FT ACROSS THIS REGION INCLUDING WELL
DOWNSTREAM TO NEAR 09.5N100.5W. WINDS ARE FORECAST TO INCREASE
TO MINIMAL GALE-FORCE SPEEDS OVERNIGHT AND THEN CONTINUE THROUGH
THE REMAINDER OF THE WEEKEND INTO EARLY SAT BEFORE DIMINISHING.
WINDS MAY BRIEFLY LOWER TO JUST BELOW GALE-FORCE FRI AFTERNOON.
SEAS WILL PEAK AT 14-15 FT DURING THIS EVENT.
PLEASE READ THE LATEST HIGH SEAS FORECAST ISSUED BY THE NATIONAL
HURRICANE CENTER AT WEBSITE -
HTTPS://WWW.NHC.NOAA.GOV/TEXT/MIAHSFEP2.SHTML FOR MORE
INFORMATION.
..INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH
A SURFACE TROUGH EXTENDS FROM 08N78W TO 04N90W. THE ITCZ EXTENDS
FROM 04N90W TO 01N105W TO BEYOND 00N140W. SCATTERED MODERATE
CONVECTION IS NOTED FROM 00N TO 04N BETWEEN 99W AND 108W, AND
FROM 04N TO 09N BETWEEN 121W AND 128W.
..OFFSHORE WATERS WITHIN 250 NM OF MEXICO
PLEASE SEE SPECIAL FEATURES ABOVE FOR MORE ON A GALE WARNING IN
THE GULF OF TEHUANTEPEC.
ASIDE FROM THE GULF OF TEHUANTEPEC, A WEAK PRESSURE GRADIENT IS
GENERATING LIGHT TO GENTLE WINDS. MODERATE SEAS PREVAIL OVER THE
OPEN WATERS, WITH SLIGHT SEAS IN THE GULF OF CALIFORNIA.
FOR THE FORECAST ASIDE FROM THE GULF OF TEHUANTEPEC GALE WARNING,
A WEAK PRESSURE GRADIENT WILL SUPPORT LIGHT TO GENTLE WINDS,
INCREASING TO MODERATE NEAR BAJA CALIFORNIA BY THE END OF THE
WEEK, THEN TO MODERATE TO FRESH THIS WEEKEND AS THE PRESSURE
GRADIENT TIGHTENS SLIGHTLY. MODERATE SEAS WILL PREVAIL OVER THE
OPEN WATERS, WITH SLIGHT SEAS IN THE GULF OF CALIFORNIA. SEAS MAY
BUILD IN FRESH N SWELLS OFF BAJA CALIFORNIA NORTE LATE IN THE
WEEKEND INTO EARLY NEXT WEEK.
....OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA,
AND WITHIN 750 NM OF ECUADOR...
SEAS OF 7-9 FT ARE OFFSHORE WESTERN GUATEMALA DUE TO AN ONGOING
GULF OF TEHUANTEPEC GAP WIND EVENT. LIGHT TO GENTLE WINDS AND
MODERATE SEAS IN THE 3-6 FT RANGE PREVAIL ACROSS THE REMAINDER OF
THE DISCUSSION WATERS.
FOR THE FORECAST, LARGE NW SWELL GENERATED BY THE GALE-FORCE GAP
WINDS IN THE GULF OF TEHUANTEPEC WILL IMPACT THE OFFSHORE WATERS
OF GUATEMALA ON FRI. FRESH TO LOCALLY STRONG WINDS WILL PULSE
NIGHTLY IN THE GULF OF PAPAGAYO STARTING THU NIGHT. MODERATE
WINDS WILL PULSE IN THE GULF OF PANAMA STARTING THU NIGHT, THEN
PULSE TO MODERATE TO FRESH THIS WEEKEND. GENTLE BREEZES AND
MODERATE SEAS WILL PREVAIL ELSEWHERE.
..REMAINDER OF THE AREA
A WEAK PRESSURE GRADIENT ACROSS THE AREA IS SUPPORTING MOSTLY
GENTLE TO MODERATE WINDS ACROSS THE OPEN WATERS. MODERATE WAVE
HEIGHTS IN THE 4-6 FT RANGE PREVAIL.
FOR THE FORECAST, MODERATE OR WEAKER WINDS AND MODERATE SEAS
WILL PREVAIL ACROSS THE REGION INTO THE WEEKEND. FRESH N SWELL
MAY BUILD S OF 30N FROM OFF CALIFORNIA BY THE END OF THE WEEKEND.
A FRONT MAY MOVE JUST SE OF 30N140W BY TUE EVENING, STALLING
OVER THE NW WATERS WITH FRESH TO STRONG WINDS AND BUILDING SEAS W
OF IT.
AL
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