High Seas Forecast
Issued by NWS
Issued by NWS
673 FZPN40 PHFO 301513 HSFNP HIGH SEAS FORECAST NATIONAL WEATHER SERVICE HONOLULU HI 1700 UTC WED SEP 30 2026 SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS SEAS GIVEN AS SIGNIFICANT WAVE HEIGHT...WHICH IS THE AVERAGE HEIGHT OF THE HIGHEST 1/3 OF THE WAVES.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 180W SYNOPSIS VALID 1200 UTC SEP 30 2026. 24 HOUR FORECAST VALID 1200 UTC OCT 01 2026. 48 HOUR FORECAST VALID 1200 UTC OCT 02 2026. .WARNINGS. ...TROPICAL STORM WARNING... .TROPICAL STORM NOLO NEAR 22.0N 165.0W 991 MB AT 1500 UTC SEP 30 MOVING WSW OR 250 DEG AT 5 KT. 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 100 NM NW QUADRANT. SEAS 4 M OR GREATER WITHIN 150 NM NE QUADRANT...120 NM SE QUADRANT...210 NM SW QUADRANT...AND 240 NM NW QUADRANT WITH SEAS TO 8 M. SEAS 2.5 TO 3.5 M ELSEWHERE FROM 17N TO 27N BETWEEN 159W AND 180W. WINDS 20 TO 30 KT ELSEWHERE FROM 20N TO 26N BETWEEN 158W AND 169W. ISOLATED MODERATE TSTMS WITHIN 90 NM OF CENTER. .24 HOUR FORECAST TROPICAL STORM NOLO NEAR 22.1N 165.7W. MAXIMUM SUSTAINED WINDS 50 KT GUSTS 60 KT. TROPICAL STORM FORCE WINDS WITHIN 90 NM N SEMICIRCLE...60 NM SE QUADRANT AND 50 NM SW QUADRANT. SEAS 4 M OR GREATER FROM 19N TO 25N BETWEEN 163W AND 169W WITH SEAS TO 7 M. SEAS 2.5 TO 3.5 M ELSEWHERE FROM 17N TO 30N BETWEEN 160W AND 177W. WINDS 20 TO 30 KT ELSEWHERE FROM 19N TO 27N BETWEEN 161W AND 171W. .48 HOUR FORECAST TROPICAL STORM NOLO NEAR 22.6N 167.1W. MAXIMUM SUSTAINED WINDS 60 KT GUSTS 75 KT. TROPICAL STORM FORCE WINDS WITHIN 100 NM NE QUADRANT...80 NM SE QUADRANT...60 NM SW QUADRANT...AND 90 NM NW QUADRANT. SEAS 4 M OR GREATER FROM 21N TO 26N BETWEEN 163W AND 170W WITH SEAS TO 7 M. SEAS 2.5 TO 3.5 M ELSEWHERE FROM 17N TO 29N BETWEEN 161W AND 176W. WINDS 20 TO 30 KT ELSEWHERE FROM 19N TO 27N BETWEEN 162W AND 173W. 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. .FRONT 30N164W 28N167W THENCE TROUGH 27N170W 30N178W MOVING SE 15 KT. .24 HOUR FORECAST 30N153W 28N158W THENCE TROUGH 26N164W. .48 HOUR FORECAST FRONT 30N150W 29N152W THENCE TROUGH 29N162W 28N166W 26N167W. .WINDS 20 KT OR LESS OVER REMAINDER OF FORECAST AREA. .SEAS 2.5 M OR LOWER OVER REMAINDER OF FORECAST AREA. .MONSOON TROUGH 11N140W 10N151W 12N159W 11N170W 08N180W. SCATTERED MODERATE TSTMS S OF TROUGH W OF 160W. ISOLATED MODERATE TSTMS S OF TROUGH E OF 160W. $$ .FORECASTER TSAMOUS. HONOLULU HI.