Sinlaku Continues to Impact the Marianas; Severe Weather from the Central US to the Northeast; Late-Season Snow in the Northwest

Sinlaku continues to bring destructive winds, widespread heavy rain/flooding, and storm surge to the Marianas. Showers and severe thunderstorms are expected from the Northeast to the Mid-Mississippi Valley and to the Central/Southern Plains through Thursday. A front will produce late-season snowfall over the Cascades and Northern Rockies and coastal rain over the Northwest Coast through Thursday. Read More >

Current conditions at

DW8787 CHEHALIS (D8787)

Lat: 46.64646°NLon: 122.8388°WElev: 550.0ft.

NA

38°F

3°C

Humidity 97%
Wind Speed WNW 0 MPH
Barometer 29.82 in (1009.82 mb)
Dewpoint 37°F (3°C)
Visibility NA
Last update 15 Apr 02:31 AM PDT
Extended Forecast for

4 Miles SSW Onalaska WA

  • Overnight

    Overnight: A 20 percent chance of rain before 3am.  Mostly cloudy, with a low around 33. Calm wind.

    Low: 33 °F

    Slight Chance
    Rain

  • Wednesday

    Wednesday: A chance of rain and snow showers between 8am and 11am, then rain showers. Some thunder is also possible.  High near 47. Calm wind becoming west around 6 mph in the afternoon.  Chance of precipitation is 90%. Little or no snow accumulation expected.

    High: 47 °F

    Rain/Snow
    then Showers

  • Wednesday Night

    Wednesday Night: Rain and thunderstorms likely before 9pm, then a slight chance of rain between 9pm and 10pm.  Mostly cloudy, with a low around 31. Light and variable wind.  Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 31 °F

    Rain Likely
    then Partly
    Cloudy

  • Thursday

    Thursday: A 20 percent chance of rain after 11am.  Partly sunny, with a high near 54. Light and variable wind.

    High: 54 °F

    Slight Chance
    Rain

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 35. West wind around 6 mph becoming calm  in the evening.

    Low: 35 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 57.

    High: 57 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 36.

    Low: 36 °F

    Mostly Cloudy

  • Saturday

    Saturday: A slight chance of rain after 11am.  Mostly cloudy, with a high near 65.

    High: 65 °F

    Slight Chance
    Rain

  • Saturday Night

    Saturday Night: A chance of rain.  Mostly cloudy, with a low around 43.

    Low: 43 °F

    Chance Rain

Detailed Forecast

Overnight
A 20 percent chance of rain before 3am. Mostly cloudy, with a low around 33. Calm wind.
Wednesday
A chance of rain and snow showers between 8am and 11am, then rain showers. Some thunder is also possible. High near 47. Calm wind becoming west around 6 mph in the afternoon. Chance of precipitation is 90%. Little or no snow accumulation expected.
Wednesday Night
Rain and thunderstorms likely before 9pm, then a slight chance of rain between 9pm and 10pm. Mostly cloudy, with a low around 31. Light and variable wind. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday
A 20 percent chance of rain after 11am. Partly sunny, with a high near 54. Light and variable wind.
Thursday Night
Mostly cloudy, with a low around 35. West wind around 6 mph becoming calm in the evening.
Friday
Partly sunny, with a high near 57.
Friday Night
Mostly cloudy, with a low around 36.
Saturday
A slight chance of rain after 11am. Mostly cloudy, with a high near 65.
Saturday Night
A chance of rain. Mostly cloudy, with a low around 43.
Sunday
Rain likely, mainly after 11am. Mostly cloudy, with a high near 66.
Sunday Night
A chance of rain. Mostly cloudy, with a low around 43.
Monday
A chance of rain. Partly sunny, with a high near 69.
Monday Night
A slight chance of rain. Partly cloudy, with a low around 43.
Tuesday
A chance of rain. Partly sunny, with a high near 66.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SSW Onalaska WA
 46.52°N 122.75°W (Elev. 423 ft)
1:16 am PDT Apr 15, 2026
2am PDT Apr 15, 2026-6pm PDT Apr 21, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database