National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

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 N 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

  • Overnight

    Overnight: A chance of rain and snow. Mostly cloudy, with a low around 31. Wind chill values between 23 and 28. West wind around 14 mph, with gusts as high as 23 mph. Chance of precipitation is 30%. Total nighttime snow accumulation of less than a half inch possible.

    Low: 31 °F

    Chance
    Rain/Snow

  • Monday

    Monday: Snow likely, mainly between noon and 1pm. Partly sunny, with a high near 33. Wind chill values between 20 and 25. West wind 14 to 18 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    High: 33 °F

    Snow Likely

  • Monday Night

    Monday Night: A chance of snow before 11pm, then a slight chance of snow after 2am. Mostly cloudy, with a low around 26. Wind chill values between 16 and 21. West northwest wind 13 to 16 mph becoming south southwest after midnight. Winds could gust as high as 26 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 31. Wind chill values between 17 and 22. Southwest wind 11 to 16 mph, with gusts as high as 29 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.

    High: 31 °F

    Snow

  • Tuesday Night

    Tuesday Night: Snow. The snow could be heavy at times. Low around 22. West wind 14 to 17 mph, with gusts as high as 30 mph. Chance of precipitation is 100%. New snow accumulation of 5 to 9 inches possible.

    Low: 22 °F

    Heavy Snow

  • Wednesday

    Wednesday: Snow. High near 26. 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 chance of snow after 11am. Partly sunny, with a high near 30. Breezy.

    High: 30 °F

    Chance Snow
    and Breezy

  • Thursday Night

    Thursday Night: A chance of snow before 11pm. Partly cloudy, with a low around 20.

    Low: 20 °F

    Chance Snow
    then Partly
    Cloudy

Detailed Forecast

Overnight
A chance of rain and snow. Mostly cloudy, with a low around 31. Wind chill values between 23 and 28. West wind around 14 mph, with gusts as high as 23 mph. Chance of precipitation is 30%. Total nighttime snow accumulation of less than a half inch possible.
Monday
Snow likely, mainly between noon and 1pm. Partly sunny, with a high near 33. Wind chill values between 20 and 25. West wind 14 to 18 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Monday Night
A chance of snow before 11pm, then a slight chance of snow after 2am. Mostly cloudy, with a low around 26. Wind chill values between 16 and 21. West northwest wind 13 to 16 mph becoming south southwest after midnight. Winds could gust as high as 26 mph. Chance of precipitation is 50%. New snow accumulation of less than a half inch possible.
Tuesday
Snow, mainly after 11am. High near 31. Wind chill values between 17 and 22. Southwest wind 11 to 16 mph, with gusts as high as 29 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.
Tuesday Night
Snow. The snow could be heavy at times. Low around 22. West wind 14 to 17 mph, with gusts as high as 30 mph. Chance of precipitation is 100%. New snow accumulation of 5 to 9 inches possible.
Wednesday
Snow. High near 26. 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 chance of snow after 11am. Partly sunny, with a high near 30. Breezy.
Thursday Night
A chance of snow before 11pm. Partly cloudy, with a low around 20.
Friday
Mostly sunny, with a high near 36.
Friday Night
Partly cloudy, with a low around 25.
Saturday
Partly sunny, with a high near 42.
Saturday Night
A chance of rain and snow. Mostly cloudy, with a low around 31.
Sunday
Rain and snow likely. Mostly cloudy, with a high near 40.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles N Chinook Pass WA
 46.92°N 121.52°W (Elev. 4774 ft)
Last Update:
11:27 pm PDT Apr 12, 2026
Forecast Valid:
4am PDT Apr 13, 2026-6pm PDT Apr 19, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation