The High Seas Forecast for the South Pacific

Storm Impacting the Northwest U.S.; Fire Weather Conditions in Southern California; Severe Weather in the South

A Pacific storm is bringing areas of low elevation rain, moderate to heavy mountain snow, and high winds to the Northwest. Strong Santa Ana winds and very dry conditions are producing elevated to critical fire weather conditions in southern California. Isolated strong to severe thunderstorms are possible through early Wednesday morning across parts of northeast Texas into western Tennessee. Read More >

489 FZPS40 PHFO 011514 HSFSP HIGH SEAS FORECAST NATIONAL WEATHER SERVICE HONOLULU HI 1730 UTC TUE APR 01 2025 SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS SEAS GIVEN AS SIGNIFICANT WAVE HEIGHT...WHICH IS THE AVERAGE HEIGHT OF THE HIGHEST 1/3 OF THE WAVES.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. THIS HIGH SEAS FORECAST USES 1-MINUTE AVERAGE WINDS WHICH MAY BE HIGHER THAN 10-MINUTE AVERAGE WINDS. SECURITE SOUTH PACIFIC EQUATOR TO 25S BETWEEN 120W AND 160E SYNOPSIS VALID 1200 UTC APR 01 2025. 24 HOUR FORECAST VALID 1200 UTC APR 02 2025. 48 HOUR FORECAST VALID 1200 UTC APR 03 2025. .WARNINGS. .NONE. .SYNOPSIS AND FORECAST. .TROUGH 25S161W 20S170W 18S167E MOVING E SLOWLY. SCATTERED MODERATE TSTMS WITHIN 240 NM OF TROUGH. .24 HOUR FORECAST TROUGH 25S159W 20S166W 18S170E. .48 HOUR FORECAST TROUGH 25S153W 20S162W. .TROUGH 25S164E 24S162E NEARLY STATIONARY. .24 HOUR FORECAST TROUGH 25S163E 21S164E. .48 HOUR FORECAST TROUGH 25S165E 21S163E. .WINDS 20 KT OR LESS ENTIRE FORECAST AREA. .24 HOUR FORECAST SEAS 8 TO 9 FT S OF 16S BETWEEN 122W AND 138W...S OF 23S BETWEEN 165W AND 178W...AND S OF 23S W OF 168E. .48 HOUR SEAS 8 TO 9 FT S OF LINE 13S120W 10S125W 18S136W 25S124W...AND S OF LINE 25S160E 21S176W 21S175E 25S172E. .SEAS 8 FT OR LESS REMAINDER FORECAST AREA. .ITCZ 00S120W 02S125W 03S147W. ISOLATED MODERATE TSTMS WITHIN 180 NM OF ITCZ. .ISOLATED MODERATE TSTMS FROM 16S TO 08S BETWEEN 131W AND 138W...FROM 17S TO 12S BETWEEN 141W AND 160W...AND N OF 10S W OF 161W. $$ .FORECASTER PIERCE. HONOLULU HI.