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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

Current conditions at

White Pass (TWHIT)

Lat: 46.638°NLon: 121.39°WElev: 4498.0ft.

NA

N/A

Humidity 70%
Wind Speed NW 1 MPH
Barometer NA
Dewpoint N/A
Visibility 1.24 mi
Last update 03 Apr 10:56 AM PDT
Extended Forecast for

4 Miles SW Chinook Pass WA

Winter Storm Watch April 14, 11:00am until April 15, 11:00pm
Click here for hazard details and duration
Winter Storm Watch

  • Today

    Today: Snow likely, mainly between 11am and 1pm. Partly sunny, with a high near 36. South southwest wind 7 to 9 mph, with gusts as high as 23 mph. Chance of precipitation is 60%. Total daytime snow accumulation of less than a half inch possible.

    High: 36 °F

    Snow Likely

  • Tonight

    Tonight: Snow likely before 11pm, then a chance of snow after 2am. Mostly cloudy, with a low around 29. South wind 6 to 8 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    Low: 29 °F

    Snow Likely
    then Chance
    Snow

  • Tuesday

    Tuesday: Snow, mainly after 11am. High near 33. Wind chill values between 22 and 27. Southwest wind 6 to 11 mph, with gusts as high as 26 mph. Chance of precipitation is 90%. New snow accumulation of 3 to 5 inches possible.

    High: 33 °F

    Snow

  • Tuesday Night

    Tuesday Night: Snow. The snow could be heavy at times. Low around 25. West wind 7 to 11 mph, with gusts as high as 28 mph. Chance of precipitation is 100%. New snow accumulation of 8 to 12 inches possible.

    Low: 25 °F

    Heavy Snow

  • Wednesday

    Wednesday: Snow, mainly before 2pm, then snow showers after 2pm. Some thunder is also possible. High near 29. West wind 5 to 10 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New snow accumulation of 2 to 4 inches possible.

    High: 29 °F

    Snow

  • Wednesday Night

    Wednesday Night: Snow, mainly before 11pm. Low around 22. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.

    Low: 22 °F

    Snow then
    Chance Snow

  • Thursday

    Thursday: A 40 percent chance of snow, mainly after 11am. Partly sunny, with a high near 33. New snow accumulation of less than a half inch possible.

    High: 33 °F

    Chance Snow

  • Thursday Night

    Thursday Night: A chance of snow before 11pm. Mostly cloudy, with a low around 24.

    Low: 24 °F

    Chance Snow
    then Mostly
    Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 38.

    High: 38 °F

    Mostly Sunny

Detailed Forecast

Today
Snow likely, mainly between 11am and 1pm. Partly sunny, with a high near 36. South southwest wind 7 to 9 mph, with gusts as high as 23 mph. Chance of precipitation is 60%. Total daytime snow accumulation of less than a half inch possible.
Tonight
Snow likely before 11pm, then a chance of snow after 2am. Mostly cloudy, with a low around 29. South wind 6 to 8 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Tuesday
Snow, mainly after 11am. High near 33. Wind chill values between 22 and 27. Southwest wind 6 to 11 mph, with gusts as high as 26 mph. Chance of precipitation is 90%. New snow accumulation of 3 to 5 inches possible.
Tuesday Night
Snow. The snow could be heavy at times. Low around 25. West wind 7 to 11 mph, with gusts as high as 28 mph. Chance of precipitation is 100%. New snow accumulation of 8 to 12 inches possible.
Wednesday
Snow, mainly before 2pm, then snow showers after 2pm. Some thunder is also possible. High near 29. West wind 5 to 10 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New snow accumulation of 2 to 4 inches possible.
Wednesday Night
Snow, mainly before 11pm. Low around 22. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.
Thursday
A 40 percent chance of snow, mainly after 11am. Partly sunny, with a high near 33. New snow accumulation of less than a half inch possible.
Thursday Night
A chance of snow before 11pm. Mostly cloudy, with a low around 24.
Friday
Mostly sunny, with a high near 38.
Friday Night
Partly cloudy, with a low around 27.
Saturday
Partly sunny, with a high near 44.
Saturday Night
A chance of rain and snow. Mostly cloudy, with a low around 33.
Sunday
Snow likely. Mostly cloudy, with a high near 43.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SW Chinook Pass WA
 46.83°N 121.58°W (Elev. 5059 ft)
Last Update:
11:27 pm PDT Apr 12, 2026
Forecast Valid:
9am PDT Apr 13, 2026-6pm PDT Apr 19, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation