Tehuantepec Forecast
July 31, 2026, 3:00 pm (UTC: -04:00)
Subject: Tehuantepec Forecast
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This forecast has not been reviewed. It was generated from an automatic model.
.WARNINGS.
...TROPICAL STORM WARNING...
.TROPICAL STORM GENEVIEVE NEAR 22.1N 128.6W 996 MB AT 1500 UTC
JUL 31 MOVING WNW OR 290 DEG AT 13 KT. MAXIMUM SUSTAINED WINDS
50 KT GUSTS 60 KT. TROPICAL STORM FORCE WINDS WITHIN 100 NM N
SEMICIRCLE...90 NM SE QUADRANT AND 80 NM SW QUADRANT. SEAS 4 M
OR GREATER WITHIN 180 NM NE QUADRANT...90 NM SE QUADRANT...120
NM SW QUADRANT...AND 150 NM NW QUADRANT WITH SEAS TO 8.0 M.
ELSEWHERE 23N125W TO 25N128W TO 24N131W TO 21N130W TO 19N127W TO
20N125W TO 23N125W WINDS 20 TO 33 KT. SEAS 3.0 TO 4.0 M.
REMAINDER OF AREA WITHIN 30N123W TO 30N131W TO 27N140W TO 15N140W
TO 16N127W TO 20N123W TO 30N123W WINDS 20 KT OR LESS. SEAS TO
3.0 M IN MIXED SWELL.
.24 HOUR FORECAST TROPICAL STORM GENEVIEVE NEAR 23.4N 133.5W.
MAXIMUM SUSTAINED WINDS 45 KT GUSTS 55 KT. TROPICAL STORM FORCE
WINDS WITHIN 80 NM N SEMICIRCLE AND 50 NM S SEMICIRCLE. SEAS 4 M
OR GREATER WITHIN 150 NM N AND 90 NM S SEMICIRCLE WITH SEAS TO
7.0 M. ELSEWHERE WITHIN 26N131W TO 27N134W TO 26N139W TO 24N138W
TO 22N135W TO 22N132W TO 26N131W WINDS 20 TO 33 KT. SEAS 3.0 TO
4.0 M. REMAINDER OF AREA WITHIN 28N130W TO 30N133W TO 30N139W TO
20N140W TO 18N133W TO 22N128W TO 28N130W WINDS 20 KT OR LESS.
SEAS 2.5 TO 3.0 M IN MIXED SWELL.
.48 HOUR FORECAST TROPICAL STORM GENEVIEVE NEAR 25.1N 139.1W.
MAXIMUM SUSTAINED WINDS 35 KT GUSTS 45 KT. TROPICAL STORM FORCE
WINDS WITHIN 50 NM N SEMICIRCLE AND 0 NM S SEMICIRCLE. SEAS 4 M
OR GREATER WITHIN 90 NM NE AND 60 NM SW SEMICIRCLES WITH SEAS TO
5.0 M. ELSEWHERE WITHIN 28N137W TO 30N140W TO 24N140W TO 25N137W
TO 28N137W WINDS 20 TO 33 KT. SEAS 3.0 TO 4.0 M. REMAINDER OF
AREA WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN MIXED SWELL.
.WITHIN 16N94.5W TO 16.5N94.5W TO 16N95.5W TO 15N95.5W TO
14.5N95W TO 15N94.5W TO 16N94.5W...INCLUDING THE GULF OF
TEHUANTEPEC... N WINDS 20 TO 25 KT. SEAS LESS THAN 2.5 M.
AN EARLY MORNING SCATTEROMETER SATELLITE PASS CONFIRMED FRESH TO
STRONG GAP WINDS ACROSS THE GULF OF TEHUANTEPEC. THESE WINDS ARE
LIKELY DUE TO HIGHER PRESSURE OVER SOUTH-CENTRAL MEXICO AND LOWER
PRESSURE FARTHER SOUTH INTO THE TROPICS. SEAS ARE ESTIMATED TO
BE 5-7 FT IN THE GULF OF TEHUANTEPEC. THE SATELLITE DATA ALSO
SHOWED FRESH NW WINDS OFF BAJA CALIFORNIA SUR BETWEEN CABO SAN
LAZARO AND PUNTA EUGENIA, MODERATE WINDS ELSEWHERE OFF BAJA
CALIFORNIA, ON THE WESTERN EDGE OF RIDGING FARTHER WEST OFFSHORE.
GENTLE TO MODERATE SE WINDS ARE NOTED ACROSS THE GULF OF
CALIFORNIA WITH 1-3 FT SEAS. LIGHT TO GENTLE BREEZES AND 3-5 FT
COMBINED SEAS IN W SWELL ARE NOTED ELSEWHERE OFF SOUTHERN
MEXICO.
FOR THE FORECAST, THE FRESH TO LOCALLY STRONG GAP IN THE GULF OF
TEHUANTEPEC WILL DIMINISH TODAY. MODERATE TO LOCALLY FRESH NW
WINDS ARE EXPECTED TO PULSE TONIGHT NEARSHORE BAJA CALIFORNIA.
FRESH SE TO S WINDS MAY PULSE NIGHTLY IN THE NORTHERN GULF OF
CALIFORNIA, POSSIBLY REACHING STRONG SPEEDS SAT NIGHT. NW SWELL
MAY LEAD TO ROUGH SEAS OFFSHORE BAJA CALIFORNIA NORTE SUN NIGHT
AND MON.
SHORT-TERM TEHUANTEPEC
TODAY - NNE 6-8, Seas N/A ?-? ft @ ?
TONITE - SW 2-3, Seas N/A ?-? ft @ ?
SATURDAY - NNE 6-8, Seas N/A ?-? ft @ ?
SATURDAY NIGHT - W 7-9, Seas N/A ?-? ft @ ?
LONG-TERM TEHUANTEPEC
SUNDAY - WNW 9-11, Seas N/A ?-? ft @ ?
MONDAY - SW 5-6, Seas N/A ?-? ft @ ?
TUESDAY - SSW 4-5, Seas N/A ?-? ft @ ?
WEDNESDAY - SSW 4-5, Seas N/A ?-? ft @ ?
THURSDAY - NNW 11-14, Seas N/A ?-? ft @ ?