Mazatlan to Banderas Bay Forecast
August 26, 2026, 8:00 pm (UTC: -05:00)
Subject: Mazatlan to Banderas Bay Forecast
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This forecast has not been reviewed. It was generated from an automatic model.
.WARNINGS.
...TROPICAL STORM WARNING...
.TROPICAL STORM ISELLE NEAR 22.7N 124.9W 1003 MB AT 2100 UTC AUG
26 MOVING WNW OR 295 DEG AT 9 KT. MAXIMUM SUSTAINED WINDS 35 KT
GUSTS 45 KT. TROPICAL STORM FORCE WINDS WITHIN 0 NM S SEMICIRCLE
...140 NM NE QUADRANT AND 90 NM NW QUADRANT. SEAS 4 M OR GREATER
WITHIN 90 NM S SEMICIRCLE...180 NM NE QUADRANT AND 150 NM NW
QUADRANT WITH SEAS TO 5.5 M. ELSEWHERE WITHIN 24N121W TO 26N123W
TO 25N128W TO 20N126W TO 20N124W TO 21N121W TO 24N121W WINDS 20
TO 33 KT. SEAS 2.5 TO 4.0 M. REMAINDER OF AREA WITHIN 30N121W TO
26N126W TO 30N128W TO 21N131W TO 18N127W TO 20N119W TO 30N121W
WINDS 20 KT OR LESS. SEAS 2.5 TO 3.5 M IN MIXED SWELL.
.12 HOUR FORECAST POST-TROPICAL ISELLE NEAR 23.2N 126.2W.
MAXIMUM SUSTAINED WINDS 35 KT GUSTS 45 KT.
.24 HOUR FORECAST POST-TROPICAL REMNANT LOW ISELLE NEAR 23.9N
127.9W. MAXIMUM SUSTAINED WINDS 30 KT GUSTS 40 KT. SEAS 4 M OR
GREATER WITHIN 75 NM N SEMICIRCLE...AND 0 NM S SEMICIRCLE WITH
SEAS TO 4.0 M. ELSEWHERE WITHIN 25N126W TO 26N129W TO 26N131W TO
24N131W TO 22N128W TO 23N126W TO 25N126W WINDS 20 TO 30 KT. SEAS
2.5 TO 4.0 M. REMAINDER OF AREA WITHIN 29N128W TO 27N132W TO
23N134W TO 21N133W TO 21N129W TO 24N125W TO 29N128W WINDS 20 KT
OR LESS. SEAS 2.5 TO 3.0 M IN MIXED SWELL.
.48 HOUR FORECAST POST-TROPICAL REMNANT LOW ISELLE NEAR 25.3N
131.1W. MAXIMUM SUSTAINED WINDS 25 KT GUSTS 35 KT. WITHIN 26N130W
TO 27N131W TO 26N132W TO 25N132W TO 24N132W TO 25N130W TO
26N130W WINDS 20 TO 25 KT. SEAS 2.5 TO 3.0 M. ELSEWHERE WITHIN
28N129W TO 29N133W TO 28N135W TO 25N136W TO 24N134W TO 26N130W TO
28N129W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN MIXED SWELL.
TROPICAL STORM ISELLE IS WELL BEYOND THE OFFSHORE WATERS OF BAJA
CALIFORNIA. OUTER ASSOCIATED SWELLS OF 7 TO 8 FT ARE IMPACTING
THE FAR BAJA CALIFORNIA NORTE WATERS NEAR THE OUTER OFFSHORE
BOUNDARY. MEANWHILE, FRESH TO STRONG NORTHERLY GAP WINDS CONTINUE
TO BLOW IN THE GULF OF TEHUANTEPEC WITH SEAS TO 8 FT. WINDS ARE
MODERATE OR WEAKER ELSEWHERE WITH MAINLY MODERATE SEAS, EXCEPT
SLIGHT IN THE GULF OF CALIFORNIA. ACTIVE SHOWERS AND
THUNDERSTORMS ARE PRESENT OVER THE OUTER OFFSHORE WATERS AREAS OF
SOUTHERN AND SOUTHWESTERN MEXICO AS DESCRIBED WITH INVEST EP93 IN
THE SPECIAL FEATURES SECTION ABOVE WITH LOCALLY HIGHER WINDS AND
SEAS POSSIBLE THERE.
FOR THE FORECAST, THE AREA OF LOW PRESSURE, INVEST EP93, WHICH
HAS A HIGH CHANCE FOR TROPICAL CYCLONE FORMATION, WILL MOVE
WEST-NORTHWEST AT 10 TO 15 KT WITH THE CENTER FORECAST TO STAY
BEYOND THE OFFSHORE WATERS. HOWEVER, OUTER WINDS AND SEAS ARE
FORECAST TO IMPACT PORTIONS OF THE OUTER OFFSHORE WATERS OF
SOUTHWESTERN MEXICO TO THE REVILLAGIGEDO ISLANDS LATE THURSDAY
THROUGH AT LEAST SUN NIGHT. MEANWHILE, OUTER ROUGH SWELLS
ASSOCIATED WITH TROPICAL STORM ISELLE WILL CONTINUE TO SUBSIDE
THROUGH TONIGHT AS THE SYSTEM CONTINUES TO PULL AWAY FROM THE
OFFSHORE WATERS OF BAJA CALIFORNIA WHILE WEAKENING. FRESH TO
STRONG NORTHERLY GAP WINDS WILL CONTINUE TO PULSE IN THE GULF OF
TEHUANTEPEC THROUGH EARLY SUN WITH LOCALLY ROUGH SEAS THERE AT
TIMES. A SURGE OF FRESH TO STRONG SOUTHEASTERLY WINDS LIKELY
ASSOCIATED WITH CONVECTIVE COMPLEXES MAY MOVE UP THE CENTRAL AND
NORTHERN GULF OF CALIFORNIA BOTH FRI AND SAT NIGHTS. LOOKING
AHEAD, ANOTHER AREA OF LOW PRESSURE COULD FORM THIS WEEKEND WELL
TO THE SOUTH OF SOUTHWESTERN MEXICO. ENVIRONMENTAL CONDITIONS
APPEAR FAVORABLE FOR SOME GRADUAL DEVELOPMENT OF THIS SYSTEM, AND
A TROPICAL DEPRESSION COULD FORM BY EARLY NEXT WEEK WHILE IT
MOVES WESTWARD TO WEST-NORTHWESTWARD AT 10 TO 15 KT.
TROPICAL STORM ISELLE IS CENTERED NEAR 22.7N 124.9W AT 26/2100
UTC, MOVING WEST-NORTHWEST AT 9 KT. ESTIMATED MINIMUM CENTRAL
PRESSURE IS 1003 MB. MAXIMUM SUSTAINED WIND SPEED IS 35 KT WITH
GUSTS TO 45 KT. PEAK SEAS ARE CURRENTLY AROUND 18 FT (5.5 M).
SCATTERED MODERATE ISOLATED STRONG CONVECTION IS CONFINED TO
BETWEEN 75 NM AND 210 NM IN THE NE QUADRANT ONLY. ISELLE IS
MOVING TOWARD THE WEST-NORTHWEST AND THIS GENERAL MOTION IS
EXPECTED TO CONTINUE OVER THE NEXT FEW DAYS. STEADY WEAKENING IS
EXPECTED, AND ISELLE IS FORECAST TO BECOME A POST- TROPICAL
REMNANT LOW BY TONIGHT. SWELLS GENERATED BY ISELLE WILL CONTINUE
TO AFFECT THE WEST COAST OF THE BAJA CALIFORNIA PENINSULA FOR A
COUPLE MORE DAYS. THESE SWELLS ARE LIKELY TO CAUSE LIFE-
THREATENING SURF AND RIP CURRENT CONDITIONS. PLEASE CONSULT
PRODUCTS FROM YOUR LOCAL WEATHER OFFICE. PLEASE READ THE LATEST
HIGH SEAS FORECAST ISSUED BY THE NATIONAL HURRICANE CENTER AT
WEBSITE - HTTPS://WWW.NHC.NOAA.GOV/TEXT/MIAHSFEP2.SHTML AND THE
LATEST ISELLE NHC FORECAST/ADVISORY AND PUBLIC ADVISORY AT
WWW.HURRICANES.GOV FOR MORE DETAILS.
SHORT-TERM MAZATLAN TO BAHIA BANDERAS
TODAY - WNW 8-10, Seas SW 1-3 ft @ 15sec
TONITE - SSE 6-7, Seas SSW 0-3 ft @ 19sec
THURSDAY - N 10-12, Seas SSW 0-3 ft @ 18sec
THURSDAY NIGHT - SW 6-7, Seas SSW 0-3.4 ft @ 17sec
LONG-TERM MAZATLAN TO BAHIA BANDERAS
FRIDAY - WSW 9-11, Seas SSW 0-4.2 ft @ 18sec
SATURDAY - NE 7-9, Seas SSW 0-5.8 ft @ 16sec
SUNDAY - N 8-10, Seas SSW 0-5.3 ft @ 15sec
MONDAY - NNE 9-11, Seas SSW 0-4.2 ft @ 14sec
TUESDAY - NNW 7-9, Seas SSW 0-3.3 ft @ 13sec