The High Seas Forecast for the Central North Pacific

Powerful Winter Storm from the Upper Midwest into the Northeast; Severe Thunderstorms in the Midwest and Ohio Valley

A rapidly-intensifying storm is expected to bring heavy snow, blizzard conditions, and icing from the Upper Midwest through the Great Lakes and Northeast. Scattered severe thunderstorms may produce severe/damaging wind gusts and a couple of tornadoes across parts of the Midwest and lower Ohio Valley through the evening. Arctic air will expand across the central and southern U.S.. Read More >

699 FZPN40 PHFO 042300 HSFNP HIGH SEAS FORECAST NATIONAL WEATHER SERVICE HONOLULU HI 2300 UTC SUN JAN 04 2026 SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS SEAS GIVEN AS SIGNIFICANT WAVE HEIGHT...WHICH IS THE AVERAGE HEIGHT OF THE HIGHEST 1/3 OF THE WAVES.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. THIS HIGH SEAS FORECAST USES 1-MINUTE AVERAGE WINDS WHICH MAY BE HIGHER THAN 10-MINUTE AVERAGE WINDS. SECURITE NORTH PACIFIC EQUATOR TO 30N BETWEEN 140W AND 160E SYNOPSIS VALID 1800 UTC JAN 04 2026. 24 HOUR FORECAST VALID 1800 UTC JAN 05 2026. 48 HOUR FORECAST VALID 1800 UTC JAN 06 2026. .WARNINGS. ...GALE WARNING... .LOW 25N162W 1014 MB. TROUGH 29N162W TO LOW TO 22N161W 19N162W. LOW AND TROUGH MOVING SW 10 KT. WINDS 30 TO 35 KT N OF 27N BETWEEN 162W AND 157W. WINDS 20 TO 30 KT ELSEWHERE N OF LINE 26N169W 26N160W 22N151W. SCATTERED MODERATE TSTMS FROM 19N TO 25N BETWEEN 164W AND 154W. ISOLATED MODERATE TSTMS N OF 25N BETWEEN 164W AND 160W. .24 HOUR FORECAST LOW DISSIPATED. TROUGH 28N169W 21N167W 15N166W. WINDS 20 TO 30 KT N OF LINE 25N172W 15N160W 15N150W. .48 HOUR FORECAST TROUGH 28N171W 20N171W 15N169W. WINDS 20 TO 30 KT N OF LINE 24N169W 14N151W. .SYNOPSIS AND FORECAST. .FRONT 30N167E 24N164E 21N160E MOVING E SLOWLY. WINDS 20 TO 25 KT WITHIN 120 NM OF FRONT. SEAS 4 TO 5 M NW OF FRONT. SEAS 2.5 TO 4 M ELSEWHERE NW OF LINE 30N172E 20N160E. .24 HOUR FORECAST FRONT WEAKENED TO TROUGH 30N177E 24N170E 20N160E. WINDS 20 TO 30 KT WITHIN 240 NM OF TROUGH. SEAS 4 TO 5 M N OF 27N BETWEEN 171E AND 177E. SEAS 2.5 TO 4 M ELSEWHERE NW OF LINE 30N177W 14N160E. .48 HOUR FORECAST TROUGH 30N177E 24N170E. WINDS DIMINISHED TO 20 KT OR LESS. SEE SEAS BELOW. .TROUGH 22N174E 16N173E 10N175E MOVING W 10 KT. SCATTERED MODERATE TSTMS FROM 12N TO 19N BETWEEN TROUGH AND 180W. .24 HOUR FORECAST TROUGH 22N171E 10N170E 04N173E. .48 HOUR FORECAST TROUGH 22N169E 09N166E 04N171E. .TROUGH 14N176W 06N179E 01N170E NEARLY STATIONARY. ISOLATED MODERATE TSTMS WITHIN 150 NM OF TROUGH. .24 HOUR FORECAST TROUGH DISSIPATED. .SEAS 4 TO 5 M NW OF A LINE 27N165W 26N160W 24N150W. SEAS 2.5 TO 4 M ELSEWHERE N OF 12N E OF 156W...AND N OF 22N BETWEEN 170W AND 156W. .24 HOUR FORECAST SEAS 4 TO 5 M N OF LINE 28N170W 22N156W. SEAS 2.5 TO 4 M ELSEWHERE N OF 10N E OF 160W...AND N OF 22N BETWEEN 175W AND 156W. .48 HOUR FORECAST SEAS 4 TO 5 M FROM 20N TO 27N BETWEEN 155W AND 167W. SEAS 2.5 TO 4 M ELSEWHERE N OF 05N E OF 167W...AND N OF 18N. .WINDS 20 KT OR LESS AND SEAS 2.5 M OR LESS OVER REMAINDER OF FORECAST AREA. .ITCZ 08N140W 11N152W 10N160W 06N168W. ISOLATED MODERATE TSTMS WITHIN 120 NM OF ITCZ. $$ .FORECASTER AHUE. HONOLULU HI.