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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

Chinook Pass WA

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

  • Today

    Today: A chance of snow before 2pm, then a chance of rain and snow. Mostly cloudy, with a high near 35. Wind chill values between 24 and 29. West southwest wind 10 to 13 mph. Chance of precipitation is 50%. Total daytime snow accumulation of less than a half inch possible.

    High: 35 °F

    Chance
    Rain/Snow

  • Tonight

    Tonight: Rain and snow likely before 11pm, then a chance of snow between 11pm and 5am. Mostly cloudy, with a low around 28. Wind chill values between 21 and 26. Southwest wind 7 to 10 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    Low: 28 °F

    Rain/Snow
    Likely then
    Chance Snow

  • Tuesday

    Tuesday: Snow, mainly after 11am. The snow could be heavy at times. High near 32. Wind chill values between 20 and 25. South southwest wind 8 to 13 mph. Chance of precipitation is 90%. New snow accumulation of 4 to 8 inches possible.

    High: 32 °F

    Snow Likely
    then Heavy
    Snow

  • Tuesday Night

    Tuesday Night: Snow. The snow could be heavy at times. Low around 23. South southwest wind 9 to 13 mph becoming west northwest after midnight. Chance of precipitation is 100%. New snow accumulation of 7 to 11 inches possible.

    Low: 23 °F

    Heavy Snow

  • Wednesday

    Wednesday: Snow, mainly before 2pm, then snow showers after 2pm. Some thunder is also possible. High near 27. West wind 6 to 14 mph, with gusts as high as 33 mph. Chance of precipitation is 90%. New snow accumulation of 2 to 4 inches possible.

    High: 27 °F

    Snow

  • Wednesday Night

    Wednesday Night: Snow, mainly before 11pm. Low around 19. Chance of precipitation is 90%. New snow accumulation of 1 to 2 inches possible.

    Low: 19 °F

    Snow then
    Chance Snow

  • Thursday

    Thursday: A 40 percent chance of snow after 11am. Partly sunny, with a high near 31. New snow accumulation of less than a half inch possible.

    High: 31 °F

    Chance Snow

  • Thursday Night

    Thursday Night: A chance of snow before 11pm. Partly cloudy, with a low around 22.

    Low: 22 °F

    Chance Snow
    then Partly
    Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 36.

    High: 36 °F

    Mostly Sunny

Detailed Forecast

Today
A chance of snow before 2pm, then a chance of rain and snow. Mostly cloudy, with a high near 35. Wind chill values between 24 and 29. West southwest wind 10 to 13 mph. Chance of precipitation is 50%. Total daytime snow accumulation of less than a half inch possible.
Tonight
Rain and snow likely before 11pm, then a chance of snow between 11pm and 5am. Mostly cloudy, with a low around 28. Wind chill values between 21 and 26. Southwest wind 7 to 10 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Tuesday
Snow, mainly after 11am. The snow could be heavy at times. High near 32. Wind chill values between 20 and 25. South southwest wind 8 to 13 mph. Chance of precipitation is 90%. New snow accumulation of 4 to 8 inches possible.
Tuesday Night
Snow. The snow could be heavy at times. Low around 23. South southwest wind 9 to 13 mph becoming west northwest after midnight. Chance of precipitation is 100%. New snow accumulation of 7 to 11 inches possible.
Wednesday
Snow, mainly before 2pm, then snow showers after 2pm. Some thunder is also possible. High near 27. West wind 6 to 14 mph, with gusts as high as 33 mph. Chance of precipitation is 90%. New snow accumulation of 2 to 4 inches possible.
Wednesday Night
Snow, mainly before 11pm. Low around 19. Chance of precipitation is 90%. New snow accumulation of 1 to 2 inches possible.
Thursday
A 40 percent chance of snow after 11am. Partly sunny, with a high near 31. New snow accumulation of less than a half inch possible.
Thursday Night
A chance of snow before 11pm. Partly cloudy, with a low around 22.
Friday
Mostly sunny, with a high near 36.
Friday Night
Partly cloudy, with a low around 26.
Saturday
Partly sunny, with a high near 42.
Saturday Night
A chance of rain and snow. Mostly cloudy, with a low around 33.
Sunday
Rain and snow likely. Mostly cloudy, with a high near 39.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Chinook Pass WA
 46.88°N 121.54°W (Elev. 4580 ft)
Last Update:
11:27 am PDT Apr 13, 2026
Forecast Valid:
11am PDT Apr 13, 2026-6pm PDT Apr 19, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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