Mazatlan to Banderas Bay Forecast
September 13, 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 NORBERT NEAR 18.8N 134.0W 1002 MB AT 2100 UTC
SEP 13 MOVING WNW OR 290 DEG AT 11 KT. MAXIMUM SUSTAINED WINDS
40 KT GUSTS 55 KT. TROPICAL STORM FORCE WINDS WITHIN 80 NM NE
QUADRANT...20 NM SE QUADRANT...30 NM SW QUADRANT...AND 90 NM NW
QUADRANT. SEAS 4 M OR GREATER WITHIN 30 NM S SEMICIRCLE...90 NM
NE QUADRANT AND 75 NM NW QUADRANT WITH SEAS TO 5.5 M. ELSEWHERE
WITHIN 22N130W TO 23N133W TO 21N135W TO 18N135W TO 17N132W TO
19N130W TO 22N130W WINDS 20 TO 33 KT. SEAS 2.5 TO 4.0 M.
REMAINDER OF AREA WITHIN 24N131W TO 25N134W TO 23N138W TO
17N137W TO 15N133W TO 18N129W TO 24N131W WINDS 20 KT OR LESS.
SEAS 2.5 TO 3.5 M IN MIXED SWELL.
.24 HOUR FORECAST TROPICAL STORM NORBERT NEAR 19.7N 138.6W.
MAXIMUM SUSTAINED WINDS 35 KT GUSTS 45 KT. TROPICAL STORM FORCE
WINDS WITHIN 0 NM S SEMICIRCLE...40 NM NE QUADRANT AND 50 NM NW
QUADRANT. SEAS 4 M OR GREATER WITHIN 75 NM NW SEMICIRCLE...AND 30
NM SE SEMICIRCLE WITH SEAS TO 4.5 M. ELSEWHERE WITHIN 22N134W
TO 24N137W TO 22N140W TO 18N140W TO 17N136W TO 19N134W TO 22N134W
WINDS 20 TO 33 KT. SEAS 2.5 TO 4.0 M. REMAINDER OF AREA WITHIN
25N133W TO 26N140W TO 17N140W TO 17N137W TO 18N133W TO 21N132W TO
25N133W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.5 M IN MIXED SWELL.
.48 HOUR FORECAST TROPICAL DEPRESSION NORBERT NEAR 20.7N 144.0W.
MAXIMUM SUSTAINED WINDS 30 KT GUSTS 40 KT. WITHIN 22N138W TO
23N139W TO 24N140W TO 19N140W TO 20N138W TO 22N138W WINDS 20 TO
30 KT. SEAS 2.5 TO 3.5 M. ELSEWHERE WITHIN 23N134W TO 27N140W TO
24N140W TO 22N138W TO 19N140W TO 18N137W TO 23N134W WINDS 20 KT
OR LESS. SEAS 2.5 TO 3.0 M IN MIXED SWELL.
...TROPICAL STORM WARNING...
.TROPICAL DEPRESSION FIFTEEN-E NEAR 17.2N 117.2W 1006 MB AT 2100
UTC SEP 13 MOVING W OR 260 DEG AT 7 KT. MAXIMUM SUSTAINED WINDS
30 KT GUSTS 40 KT. WITHIN 18N115W TO 19N116W TO 19N117W TO 18N118W
TO 17N117W TO 17N115W TO 18N115W WINDS 20 TO 30 KT. SEAS 2.5 TO
3.5 M.
.12 HOUR FORECAST TROPICAL STORM FIFTEEN-E NEAR 17.0N 118.2W.
MAXIMUM SUSTAINED WINDS 35 KT GUSTS 45 KT.
.24 HOUR FORECAST TROPICAL STORM FIFTEEN-E NEAR 16.7N 119.8W.
MAXIMUM SUSTAINED WINDS 35 KT GUSTS 45 KT. TROPICAL STORM FORCE
WINDS WITHIN 50 NM E SEMICIRCLE...0 NM SW QUADRANT AND 40 NM NW
QUADRANT. SEAS 4 M OR GREATER WITHIN 60 NM N SEMICIRCLE...AND 30
NM S SEMICIRCLE WITH SEAS TO 4.5 M. ELSEWHERE WITHIN 18N118W TO
19N119W TO 18N121W TO 15N121W TO 15N118W TO 16N117W TO 18N118W
WINDS 20 TO 33 KT. SEAS 2.5 TO 4.0 M. REMAINDER OF AREA WITHIN
17N117W TO 19N118W TO 19N120W TO 18N122W TO 15N121W TO 15N118W TO
17N117W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.5 M IN MIXED SWELL.
.48 HOUR FORECAST TROPICAL DEPRESSION FIFTEEN-E NEAR 16.4N
123.6W. MAXIMUM SUSTAINED WINDS 30 KT GUSTS 40 KT. WITHIN 18N119W
TO 20N123W TO 19N126W TO 17N127W TO 15N121W TO 15N119W TO
18N119W WINDS 20 TO 30 KT. SEAS 2.5 TO 3.5 M. ELSEWHERE WITHIN
18N119W TO 21N122W TO 21N126W TO 19N128W TO 16N126W TO 15N119W TO
18N119W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN MIXED SWELL.
FRESH N GAP WINDS ARE ACROSS THE GULF OF TEHUANTEPEC. ELSEWHERE,
GENTLE TO MODERATE BREEZES AND 3-6 FT SEAS PREVAIL ACROSS
MEXICAN OFFSHORE WATERS, WITH 1-3 FT SEAS IN THE GULF OF
CALIFORNIA.
FOR THE FORECAST, FIFTEEN-E WILL STRENGTHEN TO A TROPICAL STORM
AS IT MOVES AWAY FROM THE AREA TO NEAR 17.0N 118.2W MON MORNING,
THEN MOVE FARTHER AWAY TO 16.7N 119.8W MON AFTERNOON. ELSEWHERE, A
RIDGE WILL BUILD ACROSS THE OFFSHORE WATERS OF BAJA CALIFORNIA,
BRINGING MODERATE TO LOCALLY FRESH NW TO N WINDS THROUGH THE
EARLY PART OF THE WEEK. EXPECT FRESH WINDS ACROSS THE NORTHERN
GULF OF CALIFORNIA THROUGH THE EARLY PART OF THE WEEK DUE TO THE
PRESSURE GRADIENT BETWEEN THE RIDGE AND LOWER PRESSURE OVER THE
COLORADO RIVER VALLEY, LOCALLY STRONG MON NIGHT. WINDS WILL
FRESHEN AGAIN OFF BAJA CALIFORNIA BY THE END OF THE WEEK, LOCALLY
STRONG NEAR PUNTA EUGENIA. STRONG TO NEAR-GALE N GAP WINDS WILL
PULSE AGAIN IN THE TEHUANTEPEC REGION BEGINNING TONIGHT, WITH
BUILDING SEAS OF 8 TO 10 FT AT TIMES. MEANWHILE, ROUGH SEAS WILL
BUILD WELL OFFSHORE BAJA CALIFORNIA NORTE TONIGHT THROUGH MON
NIGHT.
SHORT-TERM MAZATLAN TO BAHIA BANDERAS
TODAY - SSW 8-10, Seas SW 0-2.8 ft @ 13sec
TONITE - NE 13-16, Seas SW 0-2.9 ft @ 19sec
MONDAY - NE 13-16, Seas SW 0-2.9 ft @ 19sec
MONDAY NIGHT - ESE 2-3, Seas SSW 0-3.2 ft @ 18sec
LONG-TERM MAZATLAN TO BAHIA BANDERAS
TUESDAY - SW 5-6, Seas SSW 0.9-3.6 ft @ 17sec
WEDNESDAY - NW 9-11, Seas SSW 1.6-4 ft @ 15sec
THURSDAY - NW 12-15, Seas SSW 2-4 ft @ 14sec
FRIDAY - W 10-12, Seas SW 1.2-3.4 ft @ 19sec
SATURDAY - WSW 7-9, Seas SW 0.9-2.8 ft @ 18sec