National Weather Service Marine Forecast FZPN01 KWBC

FZPN01 KWBC 241610
HSFEP1

HIGH SEAS FORECAST
NWS OCEAN PREDICTION CENTER WASHINGTON DC
1630 UTC MON AUG 24 2026

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS

SEAS GIVEN AS SIGNIFICANT WAVE HEIGHT...WHICH IS THE AVERAGE HEIGHT OF THE HIGHEST 1/3 OF THE WAVES. INDIVIDUAL WAVES MAY BE MORE THAN TWICE THE SIGNIFICANT WAVE HEIGHT.

ONLY YOU KNOW THE WEATHER AT YOUR POSITION. REPORT IT TO THE NATIONAL WEATHER SERVICE. EMAIL US AT VOSOPS@NOAA.GOV(LOWERCASE).

FOR ANY TROPICAL CYCLONE INFORMATION BEYOND 48 HOURS REFERENCE THE ASSOCIATED NWS TROPICAL CYCLONE FORECAST/ADVISORY (TCM).

SECURITE

PACIFIC S OF 67N AND N OF 30N E OF A LINE FROM THE BERING STRAIT TO 53N172E TO 50N180W TO 30N180W

ALL FORECASTS VALID OVER ICE FREE FORECAST WATERS

SYNOPSIS VALID 1200 UTC AUG 24. 24 HOUR FORECAST VALID 1200 UTC AUG 25. 48 HOUR FORECAST VALID 1200 UTC AUG 26.

.WARNINGS.

TROPICAL STORM WARNING

.TROPICAL STORM LALA NEAR 33.4N 175.3W 988 MB AT 1500 UTC AUG 24 MOVING NW OR 320 DEG AT 4 KT. MAXIMUM SUSTAINED WINDS 55 KT GUSTS 65 KT. TROPICAL STORM FORCE WINDS WITHIN 150 NM NE QUADRANT...130 NM SE QUADRANT...70 NM SW QUADRANT...AND 110 NM NW QUADRANT. SEAS 4 M OR GREATER WITHIN 210 NM NE QUADRANT...120 NM SE QUADRANT...180 NM SW QUADRANT...AND 300 NM NW QUADRANT WITH SEAS TO 7 M. ELSEWHERE FROM 30N TO 40N W OF 164W WINDS 20 TO 33 KT. SEAS 2.5 TO 4 M. .24 HOUR FORECAST TROPICAL STORM LALA NEAR 34.6N 176.8W. MAXIMUM SUSTAINED WINDS 50 KT GUSTS 60 KT. TROPICAL STORM FORCE WINDS WITHIN 130 NM NE QUADRANT...110 NM SE QUADRANT...60 NM SW QUADRANT...AND 90 NM NW QUADRANT. SEAS 4 M OR GREATER WITHIN 210 NM NE...180 NM SE...150 NM SW AND 180 NM NW QUADRANTS WITH SEAS TO 7 M. ELSEWHERE FROM 31N TO 41N W OF 170W WINDS 20 TO 33 KT. SEAS 2.5 TO 4 M. .48 HOUR FORECAST TROPICAL STORM LALA NEAR 35.6N 178.6W. MAXIMUM SUSTAINED WINDS 45 KT GUSTS 55 KT. TROPICAL STORM FORCE WINDS WITHIN 80 NM NW AND SE QUADRANTS...100 NM NE QUADRANT...AND 40 NM SW QUADRANT. SEAS 4 M OR GREATER WITHIN 150 S SEMICIRCLE...240 NM NE AND 180 NM NW QUADRANTS WITH SEAS TO 6 M. ELSEWHERE FROM 33N TO 42N W OF 172W WINDS 20 TO 33 KT. SEAS 2.5 TO 4 M.

.SYNOPSIS AND FORECAST.

.LOW JUST W OF THE AREA 65N172W 989 MB MOVING NE 20 KT. N OF A LINE FROM 50N179W TO 57N161W WINDS 20 TO 30 KT. SEAS 2.5 TO 4 M. .24 HOUR FORECAST LOW N OF THE AREA 74N155W 988 MB. N OF A LINE FROM 53N168W TO 55N154W AND IN THE BERING SEA N OF 55N E OF 175W WINDS TO 25 KT. SEAS TO 3 M. .48 HOUR FORECAST LOW WELL N OF THE AREA WITH A NEW LOW TO FORM NEAR 60N148W 1014 MB. BETWEEN 120 NM AND 300 NM SW QUADRANT WINDS TO 25 KT. SEAS TO 2.5 M.

.LOW 54N140W 1008 MB MOVING SE 10 KT. BETWEEN 180 NM AND 420 NM E QUADRANT AND WITHIN 360 NM SW AND W QUADRANTS WINDS TO 25 KT. SEAS TO 2.5 M. .24 HOUR FORECAST LOW 50N134W 1013 MB. FROM 50N TO 55N BETWEEN 138W AND 148W WINDS LESS THAN 25 KT. SEAS TO 2.5 M. .48 HOUR FORECAST LOW AND CONDITIONS ABSORBED BY LOW 47N133W DESCRIBED BELOW.

.LOW 42N139W 1013 MB MOVING E 05 KT THEN TURNING NE 10 KT AFTER 24 HOURS. FROM 40N TO 48N BETWEEN 130W AND 152W WINDS LESS THAN 25 KT. SEAS TO 2.5 M. .24 HOUR FORECAST LOW 42N136W 1012 MB. FROM 40N TO 50N BETWEEN 132W AND 152W WINDS LESS THAN 25 KT. SEAS TO 2.5 M. .48 HOUR FORECAST LOW 47N133W 1010 MB. BETWEEN 120 NM AND 360 NM W SEMICIRCLE WINDS TO 25 KT. SEAS TO 2.5 M.

.FROM 39N TO 45N E OF 128W AREA OF NW WINDS TO 25 KT. SEAS TO 3 M. .24 HOUR FORECAST CONDITIONS DIMINISHED.

.48 HOUR FORECAST FROM 49N TO 56N W OF 178W AREA OF S TO SE WINDS TO 25 KT. SEAS TO 2.5 M.

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM FROM 52N TO 55N BETWEEN 129W AND 134W...AND WITHIN 300 NM NW OF A LINE FROM 58N165W TO 50N179W. .24 HOUR FORECAST DENSE FOG WITHIN 180 NM NW OF A LINE FROM 58N160W TO 50N173W. .48 HOUR FORECAST DENSE FOG FROM 51N TO 54N W OF 170W.

.FORECASTER BANCROFT. OCEAN PREDICTION CENTER.

NATIONAL HURRICANE CENTER MIAMI FL

E PACIFIC FROM THE EQUATOR TO 30N E OF 140W AND 03.4S TO THE EQUATOR E OF 120W

SYNOPSIS VALID 1200 UTC MON AUG 24. 24 HOUR FORECAST VALID 1200 UTC TUE AUG 25. 48 HOUR FORECAST VALID 1200 UTC WED AUG 26.

.WARNINGS.

HURRICANE WARNING

.TROPICAL STORM ISELLE NEAR 18.5N 117.1W 992 MB AT 1500 UTC AUG 24 MOVING NW OR 310 DEG AT 11 KT. MAXIMUM SUSTAINED WINDS 55 KT GUSTS 65 KT. TROPICAL STORM FORCE WINDS WITHIN 120 NM NE QUADRANT...100 NM SE QUADRANT...110 NM SW QUADRANT...AND 60 NM NW QUADRANT. SEAS 4 M OR GREATER WITHIN 150 NM NW AND SE QUADRANTS...210 NM NE QUADRANT AND 90 NM SW QUADRANT WITH SEAS TO 7.0 M. ELSEWHERE WITHIN 20N114W TO 22N116W TO 20N119W TO 16N117W TO 16N115W TO 19N113W TO 20N114W WINDS 20 TO 33 KT. SEAS 3.0 TO 5.5 M. REMAINDER OF AREA WITHIN 22N112W TO 23N115W TO 20N119W TO 18N120W TO 14N117W TO 17N111W TO 22N112W WINDS 20 KT OR LESS. SEAS 2.5 TO 4.0 M IN S TO SE SWELL. .12 HOUR FORECAST HURRICANE ISELLE NEAR 19.4N 118.3W. MAXIMUM SUSTAINED WINDS 65 KT GUSTS 80 KT. SEAS TO 9.0 M. .24 HOUR FORECAST HURRICANE ISELLE NEAR 20.5N 120.2W. MAXIMUM SUSTAINED WINDS 65 KT GUSTS 80 KT. TROPICAL STORM FORCE WINDS WITHIN 140 NM NE QUADRANT...130 NM SE QUADRANT...90 NM SW QUADRANT...AND 80 NM NW QUADRANT. SEAS 4 M OR GREATER WITHIN 210 NM NE SEMICIRCLE...210 NM SE QUADRANT AND 150 NM SW QUADRANT WITH SEAS TO 9.5 M. ELSEWHERE WITHIN 22N116W TO 23N119W TO 22N123W TO 20N123W TO 17N119W TO 18N116W TO 22N116W WINDS 20 TO 33 KT. SEAS 3.0 TO 6.0 M. REMAINDER OF AREA WITHIN 26N115W TO 24N122W TO 20N124W TO 13N117W TO 20N113W TO 26N115W WINDS 20 KT OR LESS. SEAS 2.5 TO 4.0 M IN SE TO S SWELL. .36 HOUR FORECAST TROPICAL STORM ISELLE NEAR 21.1N 122.1W. MAXIMUM SUSTAINED WINDS 60 KT GUSTS 75 KT. SEAS TO 9.5 M. .48 HOUR FORECAST TROPICAL STORM ISELLE NEAR 21.5N 123.8W. MAXIMUM SUSTAINED WINDS 50 KT GUSTS 60 KT. TROPICAL STORM FORCE WINDS WITHIN 110 NM NE QUADRANT...70 NM SE QUADRANT...60 NM SW QUADRANT...AND 80 NM NW QUADRANT. SEAS 4 M OR GREATER WITHIN 240 NM N SEMICIRCLE...210 NM SE QUADRANT AND 150 NM SW QUADRANT WITH SEAS TO 8.5 M. ELSEWHERE WITHIN 24N121W TO 25N123W TO 25N126W TO 23N128W TO 20N124W TO 21N120W TO 24N121W WINDS 20 TO 33 KT. SEAS 3.5 TO 6.0 M. REMAINDER OF AREA WITHIN 29N120W TO 28N126W TO 24N130W TO 20N129W TO 18N125W TO 20N117W TO 29N120W WINDS 20 KT OR LESS. SEAS 2.5 TO 4.5 M IN SE TO E SWELL.

FORECAST WINDS IN AND NEAR ACTIVE TROPICAL CYCLONES SHOULD BE USED WITH CAUTION DUE TO UNCERTAINTY IN FORECAST TRACK...SIZE AND INTENSITY.

.SYNOPSIS AND FORECAST.

.WITHIN 16N94.5W TO 16N95W TO 15N95.5W TO 14N95.5W TO 14.5N95.5W TO 15N94.5W TO 16N94.5W...INCLUDING THE GULF OF TEHUANTEPEC... N TO NE WINDS 20 TO 25 KT. SEAS TO 2.5 M. .24 HOUR FORECAST WITHIN 16N95W TO 15N96W TO 14N96W TO 14N95W TO 15N95W TO 16N95W...INCLUDING THE GULF OF TEHUANTEPEC... N TO NE WINDS 20 TO 30 KT. SEAS TO 2.5 M. .48 HOUR FORECAST WITHIN 16N94.5W TO 16N95W TO 15N95.5W TO 14N95.5W TO 14N95W TO 14.5N94.5W TO 16N94.5W...INCLUDING THE GULF OF TEHUANTEPEC... N TO NE WINDS 20 TO 30 KT. SEAS 2.5 TO 3.0 M.

.WITHIN 11N86W TO 11N87W TO 11N88W TO 11N89W TO 10N88W TO 10N87W TO 11N86W...INCLUDING THE GULF OF PAPAGAYO... NE TO E WINDS 20 TO 25 KT. SEAS 2.5 IN NE TO E SWELL. ELSEWHERE WITHIN 11N88W TO 12N89W TO 11N90W TO 10N89W TO 11N89W TO 11N88W WINDS 20 KT OR LESS. SEAS 2.5 M IN E SWELL. .24 HOUR FORECAST WITHIN 11N86W TO 11N87W TO 10N88W TO 10N87W TO 11N86W...INCLUDING THE GULF OF PAPAGAYO... NE WINDS 20 TO 30 KT. SEAS TO 2.5 M. .48 HOUR FORECAST WITHIN 11N86W TO 11N87W TO 11N88W TO 11N89W TO 10N89W TO 10N87W TO 11N86W...INCLUDING THE GULF OF PAPAGAYO... NE TO E WINDS 20 TO 25 KT. SEAS TO 2.5 M IN NE TO E SWELL.

.LOW PRES NEAR 12N121W 1007 MB. WITHIN 12N119W TO 11N120W TO 11N121W TO 11N120W TO 12N119W WINDS 20 KT OR LESS. SEAS 2.5 M IN SE TO S SWELL. .24 HOUR FORECAST LOW PRES TO BECOME ABSORBED IN BROADER CIRCULATION OF ISELLE.

.48 HOUR FORECAST WITHIN 02S116W TO 01S120W TO 00N131W TO 03.4S120W TO 02S120W TO 03.4S115W TO 02S116W WINDS 20 KT OR LESS. SEAS 2.5 M IN S TO SW SWELL.

.REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS LESS THAN 2.5 M.

CONVECTION VALID AT 1530 UTC MON AUG 24...

TROPICAL STORM ISELLE
NUMEROUS MODERATE TO STRONG FROM 15N TO 19.50N BETWEEN 114W AND 118W...SCATTERED TO LOCALLY NUMEROUS MODERATE ISOLATED STRONG ELSEWHERE FROM 06.5N TO 20.5N BETWEEN 112.5W AND 127W.

INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH

MONSOON TROUGH AXIS EXTENDS FROM FROM 10.5N72W TO 06.5N80W TO 08N88W TO 06.5N105W TO 09N112W THEN RESUMES SW OF ISELLE FROM 14N118W TO LOW PRES NEAR 12N121W 1007 MB TO BEYOND 08N140W. SCATTERED TO LOCALLY NUMEROUS MODERATE ISOLATED STRONG CONVECTION FROM 02.5N TO 16N BETWEEN 93W AND 101.5W. SCATTERED MODERATE TO STRONG CONVECTION FROM FROM 05.5N TO 09N E OF 90W. SCATTERED MODERATE CONVECTION FROM 11N TO 15N BETWEEN 103W AND 106W. SCATTERED MODERATE ISOLATED STRONG CONVECTION FROM 02N TO 13N W OF 127W.

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.FORECASTER STRIPLING. NATIONAL HURRICANE CENTER.