570
AXPZ20 KNHC 180735
TWDEP
TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
1005 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 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
0730 UTC.
..SPECIAL FEATURES
GULF OF TEHUANTEPEC GALE WARNING: THE PRESSURE GRADIENT BETWEEN
HIGH PRESSURE ACROSS EASTERN MEXICO AND THE EQUATORIAL TROUGH IS
SUPPORTING GALE FORCE GAP WINDS IN THE TEHUANTEPEC REGION, WITH
SEAS PEAKING NEAR 15 FT. WINDS WILL DIMINISH BELOW GALE- FORCE
THIS MORNING, THEN PULSE TO GALE- FORCE AGAIN ON THU NIGHT INTO
FRI.
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 08N77W TO 05.5N90W. THE ITCZ
EXTENDS FROM 05.5N90W TO 02N102W TO BEYOND 01N140W. SCATTERED
MODERATE CONVECTION IS NOTED FROM 02N TO 05N BETWEEN 95W AND
105W, AND FROM 02N TO 07N BETWEEN 123W AND 130W.
..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 IS GENERATING LIGHT TO GENTLE WINDS.
MODERATE SEAS PREVAIL OVER THE OPEN WATERS, WITH SLIGHT SEAS IN
THE GULF OF CALIFORNIA.
....OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA,
AND WITHIN 750 NM OF ECUADOR...
LIGHT TO GENTLE WINDS AND MODERATE SEAS IN THE 4-6 FT RANGE
PREVAIL ACROSS THE DISCUSSION WATERS.
FOR THE FORECAST, LARGE NE SWELL GENERATED BY THE GALE FORCE GAP
WINDS IN THE GULF OF TEHUANTEPEC WILL IMPACT THE OFFSHORE WATERS
OF GUATEMALA TODAY. GENTLE BREEZES AND MODERATE SEAS WILL
PREVAIL ELSEWHERE THROUGH LATE WEEK, EXCEPT FOR THE PAPAGAYO
REGION, WHERE FRESH WINDS WILL PULSE NIGHTLY STARTING THU.
..REMAINDER OF THE AREA
A WEAK PRESSURE GRADIENT ACROSS THE AREA IS SUPPORTING MOSTLY
GENTLE TO MODERATE WINDS ACROSS THE REGION. MODERATE WAVE
HEIGHTS IN THE 4-6 FT RANGE PREVAIL.
FOR THE FORECAST, LARGE N TO NE SWELL GENERATED FROM THE GULF
OF TEHUANTEPEC GALE FORCE GAP WINDS WILL BRING ROUGH SEAS TO THE
WATERS MAINLY FROM 08N TO 12N AND EAST OF 100W TODAY. OTHERWISE,
MODERATE OR WEAKER WINDS AND MODERATE SEAS WILL PREVAIL ACROSS
THE REGION INTO THE WEEKEND.
AL
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