Sea of Cortez Southern Crossing Forecast
August 25, 2026, 2:00 pm (UTC: -05:00)
Subject: Sea of Cortez Southern Crossing Forecast
Questions/Comments visit https://svsarana.com
This forecast has not been reviewed. It was generated from an automatic model.
.WARNINGS.
...TROPICAL STORM WARNING...
.TROPICAL STORM ISELLE NEAR 20.9N 121.1W 988 MB AT 1500 UTC AUG
25 MOVING WNW OR 295 DEG AT 9 KT. MAXIMUM SUSTAINED WINDS 60 KT
GUSTS 75 KT. TROPICAL STORM FORCE WINDS WITHIN 140 NM NE
QUADRANT...180 NM SE QUADRANT...60 NM SW QUADRANT...AND 90 NM NW
QUADRANT. SEAS 4 M OR GREATER WITHIN 180 NM W SEMICIRCLE...240
NM NE QUADRANT AND 210 NM SE QUADRANT WITH SEAS TO 8.5 M.
ELSEWHERE WITHIN 22N117W TO 24N121W TO 22N124W TO 20N123W TO
19N119W TO 20N117W TO 22N117W WINDS 20 TO 33 KT. SEAS 3.5 TO 6.5 M
IN TO E SWELL. REMAINDER OF AREA WITHIN 23N113W TO 27N116W TO
26N121W TO 23N124W TO 19N124W TO 18N115W TO 23N113W WINDS 20 KT
OR LESS. SEAS 2.5 TO 5.5 M IN S TO E SWELL.
.24 HOUR FORECAST TROPICAL STORM ISELLE NEAR 22.0N 124.1W.
MAXIMUM SUSTAINED WINDS 45 KT GUSTS 55 KT. TROPICAL STORM FORCE
WINDS WITHIN 120 NM NE QUADRANT...110 NM SE QUADRANT...40 NM SW
QUADRANT...AND 90 NM NW QUADRANT. SEAS 4 M OR GREATER WITHIN 210
NM N SEMICIRCLE...240 NM SE QUADRANT AND 180 NM SW QUADRANT WITH
SEAS TO 6.5 M. ELSEWHERE WITHIN 24N121W TO 25N124W TO 25N125W TO
23N126W TO 21N123W TO 22N121W TO 24N121W WINDS 20 TO 33 KT. SEAS
3.5 TO 5.5 M. REMAINDER OF AREA WITHIN 28N117W TO 30N123W TO
28N126W TO 22N129W TO 19N126W TO 19N118W TO 28N117W WINDS 20 KT
OR LESS. SEAS 2.5 TO 4.5 M IN S TO SE SWELL.
.48 HOUR FORECAST TROPICAL STORM ISELLE NEAR 23.3N 127.9W.
MAXIMUM SUSTAINED WINDS 35 KT GUSTS 45 KT. TROPICAL STORM FORCE
WINDS WITHIN 0 NM S SEMICIRCLE...40 NM NE QUADRANT AND 30 NM NW
QUADRANT. SEAS 4 M WITHIN 120 NM N QUADRANT. ELSEWHERE WITHIN
25N126W TO 26N128W TO 25N129W TO 24N129W TO 23N128W TO 23N126W TO
25N126W WINDS 20 TO 33 KT. SEAS 3.0 TO 4.0 M. REMAINDER OR AREA
WITHIN 26N123W TO 28N128W TO 26N132W TO 22N132W TO 20N129W TO
23N124W TO 26N123W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.5 M IN E TO
SE SWELL.
...TROPICAL STORM WARNING...
.TROPICAL STORM JULIO NEAR 18.0N 118.9W 1001 MB AT 1500 UTC AUG
25 MOVING NNE OR 015 DEG AT 19 KT. MAXIMUM SUSTAINED WINDS 45 KT
GUSTS 55 KT. TROPICAL STORM FORCE WINDS WITHIN 150 NM NE
QUADRANT...110 NM SE QUADRANT...70 NM SW QUADRANT...AND 30 NM NW
QUADRANT. SEAS 4 M OR GREATER WITHIN 90 NM SE SEMICIRCLE...75 NM
NE QUADRANT AND 30 NM NW QUADRANT WITH SEAS TO 5.0 M. ELSEWHERE
WITHIN 19N116W TO 20N117W TO 18N119W TO 17N119W TO 16N118W TO
14N118W TO 19N116W WINDS 20 TO 33 KT. SEAS 3.0 TO 4.0 M.
REMAINDER OF AREA WITHIN 19N115W TO 20N117W TO 16N118W TO
18N120W TO 12N121W TO 14N117W TO 19N115W WINDS 20 KT OR LESS.
SEAS 2.5 TO 3.5 M IN S TO SE SWELL.
.12 HOUR FORECAST TROPICAL STORM JULIO NEAR 20.8N 119.0W.
MAXIMUM SUSTAINED WINDS 45 KT GUSTS 55 KT. SEAS TO 4.5 M.
.24 HOUR FORECAST...LOW DISSIPATED AND BECOMING ABSORBED WITHIN
CIRCULATION OF ISELLE.
TROPICAL STORM ISELLE IS MOVING AWAY FROM THE MEXICAN OFFSHORE
WATERS, LOCATED NEAR 20.9N 121.1W AT 8 AM PDT, MOVING WEST-NORTHWEST
AT 9 KT. MAXIMUM SUSTAINED WINDS ARE 60 KT WITH GUSTS TO 75 KT,
AND THE MINIMUM CENTRAL PRESSURE IS 988 MB. THE PROXIMITY OF
ISELLE CONTINUES TO DISRUPT THE RIDGE TO ITS NORTH, AND INTO THE
BAJA OFFSHORE WATERS. THIS IS MAINTAINING LIGHT TO GENTLE
NORTHERLY WINDS ACROSS THE BAJA CALIFORNIA WATERS AND SIMILAR N
TO NE WINDS ACROSS THE SW MEXICAN OFFSHORE WATERS. SEAS ARE 7 TO
11 FT IN S-SW SWELL FROM ISELLE ACROSS THE BAJA SUR WATERS, AND 5
TO 7 FT ACROSS THE BAJA NORTE WATERS. SEAS ARE 4 TO 5 FT
ELSEWHERE ACROSS THE REMAINDER OF THE MEXICAN OFFSHORE WATERS W
OF PUERTO ANGEL. WINDS AND SEAS ARE GRADUALLY DIMINISHING ACROSS
THE REVILLAGIGEDO ISLANDS AND AREA WATERS AS ISELLE GRADUALLY
MOVES AWAY FROM THAT AREA, AS SEAS REMAIN AROUND 12 FT. GENTLE TO
MODERATE NW TO W GAP WINDS PREVAIL ACROSS CENTRAL AND SOUTHERN
PORTIONS OF THE GULF OF CALIFORNIA. A LARGE CLUSTER OF STRONG
THUNDERSTORMS COVERS MUCH OF THE AREA ACROSS THE ENTRANCE TO THE
GULF TO LAS TRES MARIAS, AND ARE SUPPORTED BY AN UPPER LEVEL LOW
PRESSURE SYSTEM. THIS ACTIVITY IS SHIFTING NORTHWARD. OTHERWISE,
FRESH TO STRONG N TO NE GAP WINDS PERSIST ACROSS THE GULF OF
TEHUANTEPEC AND DOWNWIND TO ABOUT 14N WITH 6 TO 8 FT SEAS.
TROPICAL STORM ISELLE IS CENTERED NEAR 20.9N 121.1W AT 1500 UTC,
MOVING WEST-NORTHWEST AT 9 KT. ESTIMATED MINIMUM CENTRAL
PRESSURE IS 988 MB. MAXIMUM SUSTAINED WIND SPEED IS 60 KT WITH
GUSTS TO 75 KT. PEAK SEAS ARE ESTIMATED NEAR 28 FT. NUMEROUS
MODERATE TO STRONG CONVECTION IS NOTED FROM 20.5N TO 23N BETWEEN
119W AND 121W, WHILE SCATTERED MODERATE CONVECTION EXTENDS
ELSEWHERE FROM 20N TO 24N BETWEEN 115W AND 122W. THIS CURRENT WEST-
NORTHWEST MOTION IS EXPECTED TO CONTINUE FOR THE NEXT COUPLE OF
DAYS, WHILE ISELLE GRADUALLY WEAKENS DUE TO CONTINUED WESTERLY
UPPER LEVEL WIND SHEAR. ISELLE IS FORECAST TO BECOME A POST-
TROPICAL REMNANT LOW BY EARLY FRIDAY. S-SW SWELL GENERATED BY
ISELLE IS AFFECTING THE OFFSHORE WATERS AND WEST COAST OF THE
BAJA CALIFORNIA PENINSULA, AND WILL CONTINUE THROUGH WED MORNING
BEFORE SUBSIDING QUICKLY. THESE SWELLS ARE LIKELY TO CAUSE LARGE
AND POWERFUL SURF AND LIFE- THREATENING RIP CURRENT CONDITIONS.
PLEASE CONSULT PRODUCTS FROM YOUR LOCAL WEATHER OFFICE.
TROPICAL STORM JULIO IS CENTERED NEAR 18.0N 118.9W AT 1500 UTC,
MOVING NORTH-NORTHEAST AT 19 KT. ESTIMATED MINIMUM CENTRAL
PRESSURE IS 1001 MB. MAXIMUM SUSTAINED WIND SPEED IS 45 KT WITH
GUSTS TO 55 KT. PEAK SEAS ARE ESTIMATED AT 15 FT WITHIN 90 NM
ACROSS THE SE QUADRANT. NUMEROUS MODERATE TO STRONG CONVECTION
IS NOTED FROM 15N TO 17.5N BETWEEN 118.5W AND 121W, WHILE
SCATTERED MODERATE ISOLATED STRONG CONVECTION EXTENDS ELSEWHERE
FROM 10N TO 17N BETWEEN 117W AND 124W. JULIO HAS ACCELERATED ITS
FORWARD MOTION THIS MORNING, AND COMBINED WITH NORTHWESTERLY
UPPER LEVEL WIND SHEAR, THE CENTER HAS BECOME EXPOSED TO THE
NORTH OF THE AREA OF STRONG CONVECTION. JULIO IS EXPECTED TO MOVE
QUICKLY NORTHWARD, CONTINUE TO WEAKEN, AND GRADUALLY BECOME
ABSORBED WITHIN THE OUTER EASTERN CIRCULATION OF ISELLE THIS
EVENING THROUGH TONIGHT.
SHORT-TERM SOUTHERN CROSSING (along 23N)
TODAY - WSW 6-8, Seas SW 0-4.9 ft @ 16sec
TONITE - SW 6-8, Seas SW 0-4.4 ft @ 16sec
WEDNESDAY - SW 6-8, Seas SW 0-4.4 ft @ 16sec
WEDNESDAY NIGHT - SW 6-7, Seas SSW 0-3.9 ft @ 19sec
LONG-TERM SOUTHERN CROSSING
THURSDAY - WSW 6-8, Seas SSW 0-4 ft @ 18sec
FRIDAY - SW 9-11, Seas SSW 1.8-5.1 ft @ 18sec
SATURDAY - WSW 8-10, Seas SSW 1.9-5.1 ft @ 17sec
SUNDAY - WSW 8-10, Seas SSW 1.1-6.4 ft @ 15sec
MONDAY - ESE 5-6, Seas SSW 1-4.3 ft @ 13sec