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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

For More Weather Information:

Seattle, WA Local Forecast Office

29NM SSW Seattle WA

Marine Point Forecast

[NOTICE]

    • This Afternoon

      This Afternoon:SW wind around 14 kt. A chance of rain, mainly between 1pm and 3pm. Waves around 1 ft.

      SW 14kt
      1ft

    • Tonight

      Tonight:SSW wind 10 to 13 kt. A chance of rain, mainly between 2am and 5am. Waves around 1 ft.

      SSW 13kt
      1ft

    • Tuesday

      Tuesday:SSW wind 12 to 19 kt, with gusts as high as 25 kt. Rain, mainly after 10am. Waves around 1 ft.

      SSW 19kt
      1ft

    • Tuesday Night

      Tuesday Night:SSW wind 9 to 18 kt. Rain, mainly before 11pm. Waves 1 to 2 ft.

      SSW 18kt
      1-2ft

    • Wednesday

      Wednesday:SW wind 5 to 10 kt. A chance of rain, then showers and possibly a thunderstorm after 11am. Waves 1 ft or less.

      SW 10kt
      < 1ft

    • Wednesday Night

      Wednesday Night:W wind 5 to 10 kt becoming variable and less than 5 kt in the evening. Rain likely before 11pm. Waves 1 ft or less.

      W 10kt⇓
      < 1ft

    • Thursday

      Thursday:Variable winds less than 5 kt becoming SW 5 to 7 kt in the afternoon. Mostly sunny. Waves 1 ft or less.

      ⇑SW 7kt
      < 1ft

    • Thursday Night

      Thursday Night:SSW wind 5 to 9 kt. Partly cloudy. Waves 1 ft or less.

      SSW 9kt
      < 1ft

    • Friday

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

      Light Wind
      < 1ft


Associated Zone Forecast which includes this point

Last Update: 11:27 am PDT Apr 13, 2026
Forecast Valid: 12pm PDT Apr 13, 2026-6pm PDT Apr 19, 2026

View Nearby Observations

Detailed Forecast


This Afternoon
SW wind around 14 kt. A chance of rain, mainly between 1pm and 3pm. Waves around 1 ft.
Tonight
SSW wind 10 to 13 kt. A chance of rain, mainly between 2am and 5am. Waves around 1 ft.
Tuesday
SSW wind 12 to 19 kt, with gusts as high as 25 kt. Rain, mainly after 10am. Waves around 1 ft.
Tuesday Night
SSW wind 9 to 18 kt. Rain, mainly before 11pm. Waves 1 to 2 ft.
Wednesday
SW wind 5 to 10 kt. A chance of rain, then showers and possibly a thunderstorm after 11am. Waves 1 ft or less.
Wednesday Night
W wind 5 to 10 kt becoming variable and less than 5 kt in the evening. Rain likely before 11pm. Waves 1 ft or less.
Thursday
Variable winds less than 5 kt becoming SW 5 to 7 kt in the afternoon. Mostly sunny. Waves 1 ft or less.
Thursday Night
SSW wind 5 to 9 kt. Partly cloudy. Waves 1 ft or less.
Friday
Variable winds 5 kt or less. Partly sunny. Waves 1 ft or less.

*Notices:

  1. 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.
  2. 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.
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ABOUT THIS FORECAST

Point Forecast: 47.17°N 122.66°W
Last Update: 11:27 am PDT Apr 13, 2026
Forecast Valid: 12pm PDT Apr 13, 2026-6pm PDT Apr 19, 2026
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