Mazatlan to Banderas Bay Forecast
August 24, 2026, 8:01 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.
...HURRICANE WARNING...
.TROPICAL STORM ISELLE NEAR 19.2N 118.0W 988 MB AT 2100 UTC AUG
24 MOVING NW OR 310 DEG AT 11 KT. MAXIMUM SUSTAINED WINDS 60 KT
GUSTS 75 KT. TROPICAL STORM FORCE WINDS WITHIN 130 NM NE
QUADRANT...170 NM SE QUADRANT...110 NM SW QUADRANT...AND 60 NM
NW QUADRANT. SEAS 4 M OR GREATER WITHIN 210 NM NE QUADRANT...
180 NM SE QUADRANT...90 NM SW QUADRANT...AND 150 NM NW QUADRANT
WITH SEAS TO 8.5 M. ELSEWHERE WITHIN 21N114W TO 22N116W TO 21N120W
TO 18N119W TO 15N116W TO 19N114W TO 21N114W WINDS 20 TO 33 KT.
SEAS 3.0 TO 6.0 M. REMAINDER OF AREA WITHIN 25N115W TO 22N120W
TO 18N122W TO 10N122W TO 10N118W TO 18N112W TO 25N115W WINDS 20
KT OR LESS. SEAS 2.5 TO 4.5 M IN SE TO S SWELL.
.12 HOUR FORECAST HURRICANE ISELLE NEAR 20.14N 119.4W. MAXIMUM
SUSTAINED WINDS 65 KT GUSTS 80 KT. SEAS TO 9.0 M.
.24 HOUR FORECAST TROPICAL STORM ISELLE NEAR 20.9N 121.3W.
MAXIMUM SUSTAINED WINDS 60 KT GUSTS 75 KT. TROPICAL STORM FORCE
WINDS WITHIN 80 NM W SEMICIRCLE...140 NM NE QUADRANT AND 180 NM
SE QUADRANT. SEAS 4 M OR GREATER WITHIN 240 NM NE
SEMICIRCLE...210 NM SE QUADRANT AND 120 NM SW QUADRANT WITH SEAS
TO 9.0 M. ELSEWHERE WITHIN 23N117W TO 24N120W TO 21N123W TO
19N119W TO 16N119W TO 19N116W TO 23N117W WINDS 20 TO 33 KT. SEAS
4.0 TO 6.0 M. REMAINDER OF AREA WITHIN 23N114W TO 26N114W TO
28N117W TO 27N122W TO 20N126W TO 12N118W TO 23N114W WINDS 20 KT
OR LESS. SEAS 2.5 TO 4.5 M IN S TO SE SWELL.
.48 HOUR FORECAST TROPICAL STORM ISELLE NEAR 21.9N 124.9W.
MAXIMUM SUSTAINED WINDS 45 KT GUSTS 55 KT. TROPICAL STORM FORCE
WINDS WITHIN 60 NM NW AND SE QUADRANTS...80 NM NE QUADRANT AND 40
NM SW QUADRANT. SEAS 4 M OR GREATER WITHIN 210 NM N
SEMICIRCLE... 180 NM SE QUADRANT AND 150 NM SW QUADRANT WITH SEAS
TO 7.0 M. ELSEWHERE WITHIN 26N123W TO 24N126W TO 21N125W TO
22N123W TO 22N121W TO 23N120W TO 26N123W WINDS 230 TO 33 KT. SEAS
3.5 TO 5.5 M. REMAINDER OF AREA WITHIN 27N119W TO 29N123W TO
27N128W TO 20N131W TO 18N126W TO 20N119W TO 27N119W WINDS 20 KT
OR LESS. SEAS 2.5 TO 4.5 M IN E TO SE SWELL.
...TROPICAL STORM WARNING...
.TROPICAL DEPRESSION TEN-E NEAR 13.5N 120.8W 1006 MB AT 2100 UTC
AUG 24 MOVING N OR 010 DEG AT 7 KT. MAXIMUM SUSTAINED WINDS 30
KT GUSTS 40 KT. WITHIN 14N118W TO 14N120W TO 11N121W TO 11N120W
TO 12N119W TO 14N118W WINDS 20 TO 30 KT. SEAS 2.5 TO 3.0 M.
.12 HOUR FORECAST TROPICAL STORM TEN-E NEAR 14.9N 120.1W.
MAXIMUM SUSTAINED WINDS 35 KT GUSTS 45 KT. SEAS TO 3.5 M.
.24 HOUR FORECAST TROPICAL STORM TEN-E NEAR 18.1N 119.9W.
MAXIMUM SUSTAINED WINDS 35 KT GUSTS 45 KT. TROPICAL STORM FORCE
WINDS WITHIN 50 NM E SEMICIRCLE AND 0 NM W SEMICIRCLE. SEAS TO 4
M WITHIN 90 NM E SEMICIRCLE. ELSEWHERE WITHIN 19N119W TO 19N120W
TO 18N119W TO 18N120W TO 18N119W TO 19N119W WINDS 20 TO 33 KT.
SEAS 2.5 TO 4.0 M.
.36 HOUR FORECAST...DISSIPATED.
TROPICAL STORM ISELLE: AT 2100 UTC, THE CENTER OF ISELLE WAS
LOCATED NEAR 19.2N 118.0W AT 2100 UTC, MOVING NORTHWEST AT 11
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 26 FT. NUMEROUS MODERATE TO STRONG CONVECTION IS
NOTED FROM 18N TO 21.5N BETWEEN 115W AND 119W, WHILE SCATTERED TO
LOCALLY NUMEROUS MODERATE ISOLATED STRONG CONVECTION EXTENDS
ELSEWHERE FROM 14N TO 23N BETWEEN 109W AND 120W. ISELLE IS
EXPECTED TO CONTINUE MOVING NORTHWESTWARD THROUGH TONIGHT,
FOLLOWED BY A GRADUAL TURN TOWARD THE WEST-NORTHWEST ON TUESDAY.
SOME STRENGTHENING IS EXPECTED TONIGHT THROUGH TUE, AND ISELLE IS
EXPECTED TO BECOME A SHORT- LIVED HURRICANE LATE TONIGHT THROUGH
TUE. GRADUAL WEAKENING IS THEN FORECAST STARTING ON TUESDAY AS
ISELLE ENCOUNTERS INCREASING UPPER LEVEL WIND SHEAR. SWELL
GENERATED BY ISELLE HAS BEGUN TO REACH THE WEST COAST OF THE BAJA
CALIFORNIA PENINSULA TODAY AND WILL SPREAD NORTHWARD AND BUILD
ACROSS THE BAJA WATERS AND COASTS TODAY THROUGH TUE NIGHT, THEN
SUBSIDE ON WED. THIS S-SW SWELL WILL LIKELY PRODUCE LARGE AND
POWERFUL SURF AND LIFE-THREATENING RIP CURRENT CONDITIONS. PLEASE
CONSULT PRODUCTS FROM YOUR LOCAL WEATHER OFFICE.
TROPICAL DEPRESSION TEN-E: THE SMALL AREA OF LOW PRESSURE
LOCATED WELL TO THE SOUTHWEST OF THE SOUTHERN TIP OF THE BAJA
CALIFORNIA PENINSULA, AND TO THE SW OF ISELLE, HAS BE CLASSIFIED
AS TROPICAL DEPRESSION TEN-E. SHOWERS AND THUNDERSTORMS HAVE
INCREASED SIGNIFICANTLY NEAR THE CENTER TODAY, WITH NUMEROUS
MODERATE TO STRONG CONVECTION OCCURRING WITHIN 75 NM OF THE
CENTER. AT 2100 UTC, THE CENTER TEN-E WAS LOCATED NEAR 13.5N
120.8W, MOVING NORTH AT 7 KT. MAXIMUM SUSTAINED WIND SPEED IS 30
KT WITH GUSTS TO 40 KT. MINIMUM CENTRAL PRESSURE IS 1006 MB.
TEN-E IS EXPECTED TO MOVE NORTH- NORTHEASTWARD LATER TONIGHT
THROUGH TUE AND BEGIN TO ACCELERATE. SOME STRENGTHENING IS
EXPECTED, AND TEN-E IS FORECAST TO BECOME A TROPICAL STORM
TONIGHT THROUGH TUE. TEN-E WILL GRADUALLY BECOME ENTRAINED IN THE
BROADER CIRCULATION OF ISELLE, AND MOVE NORTHWARD TOWARDS THE
SOUTHEASTERN SIDE OF ISELLE. AS THIS OCCURS, THE SAME VERTICAL
WIND SHEAR THAT WILL LEAD TO THE WEAKENING OF ISELLE, WILL LEAD
TO THE WEAKENING AND DISSIPATION OF THE MUCH SMALLER TEN-E BY
WED.
AN AREA OF LOW PRESSURE IS EXPECTED TO DEVELOP WELL SOUTH OF THE
SOUTHERN TIP OF THE BAJA CALIFORNIA PENINSULA DURING THE MIDDLE
PART OF THE WEEK. GRADUAL DEVELOPMENT IS EXPECTED THEREAFTER, AND
A TROPICAL DEPRESSION IS LIKELY TO FORM LATER THIS WEEK OR OVER
THE WEEKEND WHILE THE SYSTEM MOVES GENERALLY WEST-NORTHWESTWARD
AT 10 TO 15 KT.
SHORT-TERM MAZATLAN TO BAHIA BANDERAS
TODAY - NW 10-12, Seas SSW 1.6-4.3 ft @ 17sec
TONITE - SSE 6-7, Seas SSW 3.4-4.4 ft @ 18sec
TUESDAY - SSE 6-7, Seas SSW 3.4-4.4 ft @ 18sec
TUESDAY NIGHT - SE 4-5, Seas SW 0-3.1 ft @ 16sec
LONG-TERM MAZATLAN TO BAHIA BANDERAS
WEDNESDAY - WNW 7-9, Seas SW 0-3 ft @ 15sec
THURSDAY - WNW 10-12, Seas SSW 1.5-3.5 ft @ 18sec
FRIDAY - W 9-11, Seas SSW 0-4.1 ft @ 18sec
SATURDAY - WNW 9-11, Seas SSW 0-5.3 ft @ 15sec
SUNDAY - W 8-10, Seas SSW 0-3.9 ft @ 14sec