Mazatlan to Banderas Bay Forecast
August 25, 2026, 8:05 am (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 20.7N 119.9W 988 MB AT 0900 UTC AUG
25 MOVING NW OR 305 DEG AT 13 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 210 NM E SEMICIRCLE...105
NM SW QUADRANT AND 180 NM NW QUADRANT WITH SEAS TO 9.0 M.
ELSEWHERE WITHIN 25N113W TO 25N120W TO 22N124W TO 18N123W TO
17N115W TO 21N112W TO 25N113W...INCLUDING WITHIN 60 NM OF
SHORE...WINDS 20 TO 33 KT. SEAS 2.5 TO 5.5 M.
.24 HOUR FORECAST TROPICAL STORM ISELLE NEAR 21.9N 123.2W.
MAXIMUM SUSTAINED WINDS 50 KT GUSTS 60 KT. TROPICAL STORM FORCE
WINDS WITHIN 130 NM NE QUADRANT...120 NM SE QUADRANT...40 NM SW
QUADRANT...AND 90 NM NW QUADRANT. SEAS 4 M OR GREATER
WITHIN 270 NM E SEMICIRCLE...105 NM SW QUADRANT AND 210 NM NW
QUADRANT WITH SEAS TO 7.0 M. ELSEWHERE WITHIN 23N118W TO 25N121W
TO 25N124W TO 22N126W TO 20N122W TO 21N117W TO 23N118W WINDS 20
TO 33 KT. SEAS 4.0 TO 5.5 M. REMAINDER OF AREA WITHIN 27N113W
TO 30N117W TO 30N122W TO 24N128W TO 18N124W TO 17N118W TO
27N113W...INCLUDING SEBASTIAN VIZCAINO BAY AND WITHIN 60 NM OF
SHORE...WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN MIXED SWELL.
.48 HOUR FORECAST TROPICAL STORM ISELLE NEAR 23.4N 126.8W.
MAXIMUM SUSTAINED WINDS 35 KT GUSTS 45 KT. TROPICAL STORM FORCE
WINDS WITHIN 0 NM S SEMICIRCLE...50 NM NE QUADRANT AND 40 NM NW
QUADRANT. SEAS 4 M OR GREATER WITHIN 165 NM NE QUADRANT...60 NM S
SEMICIRCLE AND 150 NM NW QUADRANT WITH SEAS TO 5.5 M. ELSEWHERE
WITHIN 25N124W TO 26N127W TO 25N129W TO 23N128W TO 23N125W TO
23N124W TO 25N124W WINDS 20 TO 30 KT. SEAS 2.5 TO 4.5 M.
REMAINDER OF AREA WITHIN 25N120W TO 29N124W TO 29N129W TO
26N132W TO 23N132W TO 19N127W TO 25N120W WINDS 20 KT OR LESS.
SEAS 2.5 TO 3.0 M IN MIXED SWELL.
...TROPICAL STORM WARNING...
.TROPICAL STORM JULIO NEAR 15.7N 119.8W 1003 MB AT 0900 UTC AUG
25 MOVING NNE OR 030 DEG AT 11 KT. MAXIMUM SUSTAINED WINDS 40 KT
GUSTS 50 KT. TROPICAL STORM FORCE WINDS WITHIN 140 NM NE
QUADRANT...100 NM SE QUADRANT...70 NM SW QUADRANT...AND 0 NM NW
QUADRANT. SEAS 4 M OR GREATER WITHIN 0 NM OF CENTER EXCEPT 75 NM
SE QUADRANT WITH SEAS TO 4.0 M. ELSEWHERE WITHIN 15N117W TO
17N117W TO 17N120W TO 11N122W TO 10N120W TO 12N118W TO 15N117W
WINDS 20 TO 33 KT. SEAS 2.5 TO 3.0 M.
.12 HOUR FORECAST TROPICAL STORM JULIO NEAR 18.4N 119.6W.
MAXIMUM SUSTAINED WINDS 45 KT GUSTS 55 KT.
.24 HOUR FORECAST...DISSIPATED.
TROPICAL STORM ISELLE IS NEAR 20.7N 119.9W AT 2 AM PDT, AND IS
MOVING NORTHWEST AT 13 KT. MAXIMUM SUSTAINED WINDS ARE 60 KT
WITH GUSTS TO 75 KT, AND THE MINIMUM CENTRAL PRESSURE IS 988 MB.
THE PROXIMITY OF ISELLE CONTINUE TO SUPPORT LIGHT TO GENTLE
WINDS ACROSS THE BAJA CALIFORNIA NORTE AND SW MEXICAN OFFSHORE
WATERS WHERE SEAS ARE MODERATE TO 6 FT. ACROSS THE OUTER BAJA
CALIFORNIA SUR OFFSHORE WATERS, FRESH TO STRONG SE WINDS AND
ROUGH SEAS FROM 8 TO 16 FT ARE PRESENT. IN THE GULF OF
CALIFORNIA, WINDS ARE GENTLE TO MODERATE FROM THE WNW AND SEAS
REMAIN SLIGHT. OTHERWISE, FRESH TO STRONG N TO NE GAP WINDS
PERSIST ACROSS THE GULF OF TEHUANTEPEC AND DOWNWIND TO ABOUT 14N
WITH 5 TO 9 FT SEAS.
TROPICAL STORM ISELLE IS CENTERED NEAR 20.7N 119.9W AT 25/0900
UTC, MOVING NORTHWEST AT 13 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 30 FT. NUMEROUS
MODERATE TO STRONG CONVECTION IS NOTED FROM 19N TO 24N BETWEEN
113W AND 122W, WHILE SCATTERED MODERATE CONVECTION EXTENDS
ELSEWHERE FROM 16N TO 19N BETWEEN 113W AND 119W. A TURN TOWARD
THE WEST-NORTHWEST AND A SLOWER FORWARD SPEED IS EXPECTED LATER
TODAY. GRADUAL WEAKENING IS EXPECTED OVER THE NEXT FEW DAYS, AND
ISELLE IS FORECAST TO BECOME A POST-TROPICAL REMNANT LOW BY EARLY
FRIDAY. SWELLS GENERATED BY ISELLE ARE AFFECTING THE WEST COAST
OF THE BAJA CALIFORNIA PENINSULA, AND WILL CONTINUE 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.
FORMER TROPICAL DEPRESSION TEN-E HAS BECOME TROPICAL STORM JULIO.
TROPICAL STORM JULIO IS CENTERED NEAR 15.7N 119.8W AT 25/0900
UTC, MOVING NORTH-NORTHEAST AT 11 KT. ESTIMATED MINIMUM CENTRAL
PRESSURE IS 1003 MB. MAXIMUM SUSTAINED WIND SPEED IS 40 KT WITH
GUSTS TO 50 KT. PEAK SEAS ARE 12 FT WITHIN 105 NM SE QUADRANT.
NUMEROUS MODERATE TO STRONG CONVECTION IS NOTED FROM 12N TO 16N
BETWEEN 116W AND 122W, WHILE SCATTERED TO LOCALLY NUMEROUS
MODERATE CONVECTION EXTENDS ELSEWHERE FROM 05N TO 12N BETWEEN
120W AND 130W. JULIO IS MOVING TOWARD THE NORTH-NORTHEAST NEAR
13 KT. THIS GENERAL MOTION WITH AN INCREASE IN FORWARD SPEED IS
EXPECTED TODAY. SLIGHT STRENGTHENING IS FORECAST TODAY BEFORE
JULIO BECOMES ABSORBED BY TROPICAL STORM ISELLE TONIGHT.
SHORT-TERM MAZATLAN TO BAHIA BANDERAS
TODAY - Error: 1002 - no data
TONITE - Error: 1002 - no data
WEDNESDAY - Error: 1002 - no data
WEDNESDAY NIGHT - Error: 1002 - no data
LONG-TERM MAZATLAN TO BAHIA BANDERAS
THURSDAY - Error: 1002 - no data
FRIDAY - Error: 1002 - no data
SATURDAY - Error: 1002 - no data
SUNDAY - Error: 1002 - no data
MONDAY - Error: 1002 - no data