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

  • Today

    Today: A 50 percent chance of snow. Partly sunny, with a high near 33. Wind chill values between 19 and 24. West southwest wind 14 to 16 mph, with gusts as high as 31 mph. Total daytime snow accumulation of less than a half inch possible.

    High: 33 °F

    Chance Snow

  • Tonight

    Tonight: A chance of snow before 11pm, then a slight chance of snow after 3am. Mostly cloudy, with a low around 26. Wind chill values between 17 and 22. South southwest wind 10 to 15 mph, with gusts as high as 29 mph. Chance of precipitation is 50%. New snow accumulation of less than a half inch possible.

    Low: 26 °F

    Chance Snow
    then Slight
    Chance Snow

  • Tuesday

    Tuesday: Snow, mainly after 11am. High near 30. Wind chill values between 16 and 21. Southwest wind 10 to 15 mph, with gusts as high as 32 mph. Chance of precipitation is 90%. New snow accumulation of 3 to 5 inches possible.

    High: 30 °F

    Snow

  • Tuesday Night

    Tuesday Night: Snow. The snow could be heavy at times. Low around 23. Wind chill values between 14 and 19. West wind 13 to 15 mph, with gusts as high as 33 mph. Chance of precipitation is 100%. New snow accumulation of 7 to 11 inches possible.

    Low: 23 °F

    Heavy Snow

  • Wednesday

    Wednesday: Snow. High near 26. West wind 10 to 17 mph, with gusts as high as 36 mph. Chance of precipitation is 90%. New snow accumulation of 2 to 4 inches possible.

    High: 26 °F

    Snow

  • Wednesday Night

    Wednesday Night: Snow, mainly before 11pm. Low around 18. Chance of precipitation is 90%. New snow accumulation of 1 to 2 inches possible.

    Low: 18 °F

    Snow then
    Chance Snow

  • Thursday

    Thursday: A 40 percent chance of snow after 11am. Partly sunny, with a high near 30. Little or no snow accumulation expected.

    High: 30 °F

    Chance Snow

  • Thursday Night

    Thursday Night: A chance of snow before 11pm. Partly cloudy, with a low around 21.

    Low: 21 °F

    Chance Snow
    then Partly
    Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 35.

    High: 35 °F

    Mostly Sunny

Detailed Forecast

Today
A 50 percent chance of snow. Partly sunny, with a high near 33. Wind chill values between 19 and 24. West southwest wind 14 to 16 mph, with gusts as high as 31 mph. Total daytime snow accumulation of less than a half inch possible.
Tonight
A chance of snow before 11pm, then a slight chance of snow after 3am. Mostly cloudy, with a low around 26. Wind chill values between 17 and 22. South southwest wind 10 to 15 mph, with gusts as high as 29 mph. Chance of precipitation is 50%. New snow accumulation of less than a half inch possible.
Tuesday
Snow, mainly after 11am. High near 30. Wind chill values between 16 and 21. Southwest wind 10 to 15 mph, with gusts as high as 32 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 23. Wind chill values between 14 and 19. West wind 13 to 15 mph, with gusts as high as 33 mph. Chance of precipitation is 100%. New snow accumulation of 7 to 11 inches possible.
Wednesday
Snow. High near 26. West wind 10 to 17 mph, with gusts as high as 36 mph. Chance of precipitation is 90%. New snow accumulation of 2 to 4 inches possible.
Wednesday Night
Snow, mainly before 11pm. Low around 18. 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 30. Little or no snow accumulation expected.
Thursday Night
A chance of snow before 11pm. Partly cloudy, with a low around 21.
Friday
Mostly sunny, with a high near 35.
Friday Night
Partly cloudy, with a low around 25.
Saturday
Partly sunny, with a high near 41.
Saturday Night
A chance of snow. Mostly cloudy, with a low around 31.
Sunday
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 121.51°W (Elev. 4823 ft)
Last Update:
11:27 pm PDT Apr 12, 2026
Forecast Valid:
10am PDT Apr 13, 2026-6pm PDT Apr 19, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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