Super Typhoon Sinlaku to Impact the Marianas and Guam; Severe Weather Threat from the Central Plains to the Great Lakes

Super Typhoon Sinlaku will bring destructive winds, widespread heavy rain/flooding, and thunderstorms to the Marianas Islands into Wednesday. Tropical Storm conditions are likely over Guam. Severe thunderstorms and heavy rain are likely across the Upper Mississippi Valley and Great Lakes region with potential for large to very large hail, damaging wind, and tornadoes through Tuesday. Read More >

Hazardous Weather Conditions

Small Craft Advisory in effect from April 14, 06:00 AM PDT until April 14, 10:00 PM PDT

For More Weather Information:

Seattle, WA Local Forecast Office

20NM NNW Seattle WA

Marine Point Forecast

[NOTICE]

This Afternoon
Light Wind
< 1ft
Tonight
⇑S 8kt
< 1ft
Tuesday
S 18kt
< 1ft
Tuesday Night
S 17kt⇓
< 1ft
Wednesday
⇑W 6kt
< 1ft
Wednesday Night
NW 6kt⇓
< 1ft
Thursday
Light Wind
< 1ft
Thursday Night
Light Wind
< 1ft
Friday
Light Wind
< 1ft

Associated Zone Forecast which includes this point

Last Update: 11:27 am PDT Apr 13, 2026
Forecast Valid: 2pm PDT Apr 13, 2026-6pm PDT Apr 19, 2026

View Nearby Observations

Detailed Forecast

This Afternoon

Variable winds 5 kt or less. A chance of rain. Waves 1 ft or less.

Tonight

Variable winds less than 5 kt becoming S 5 to 8 kt after midnight. Rain likely, mainly between 4am and 5am. Waves 1 ft or less.

Tuesday

S wind 11 to 18 kt. Rain. Waves 1 ft or less.

Tuesday Night

S wind 12 to 17 kt becoming N 5 to 10 kt after midnight. Rain, mainly before 11pm. Waves 1 ft or less.

Wednesday

Variable winds less than 5 kt becoming W around 6 kt in the afternoon. A chance of rain, then showers and possibly a thunderstorm after 11am. Waves 1 ft or less.

Wednesday Night

NW wind around 6 kt becoming variable and less than 5 kt in the evening. A chance of rain before 11pm. Waves 1 ft or less.

Thursday

Variable winds 5 kt or less. Mostly sunny. Waves 1 ft or less.

Thursday Night

Variable winds 5 kt or less. Partly cloudy. Waves 1 ft or less.

Friday

Variable winds 5 kt or less. Partly sunny. Waves 1 ft or less.

*Notices:

This forecast is for a single location. For safety concerns, mariners should be aware of the weather over a larger area. Forecast information for a larger area can be found within the zone forecast and the NDFD graphics.
The forecast conditions at a particular point may not exceed the criteria of a Small Craft Advisory, Gale, Storm etc. These watches/warnings/advisories are issued for the entire zone in which the point resides and mariners should act accordingly.