Lake-effect Snow and Whiteout Conditions in the Great Lakes Region; Below-average Temperatures in the East

Heavy lake-effect and lake-enhanced snow will persist downwind of the Great Lakes and produce some whiteout conditions that could cause difficult travel conditions. A coastal low will produce moderate to heavy snow over parts of southern and eastern New England into the afternoon. Below average temperatures are expected across the eastern U.S., particularly with chilly morning temperatures. Read More >

Current conditions at

CHEHALIS (CLSW1)

Lat: 46.61°NLon: 122.90833°WElev: 262.0ft.

NA

30°F

-1°C

Humidity 100%
Wind Speed NE 0 MPH
Barometer NA
Dewpoint 30°F (-1°C)
Visibility NA
Last update 18 Jan 11:09 PM PST
Extended Forecast for

2 Miles ENE Napavine WA

  • Tonight

    Tonight: Patchy dense fog before 2am, then areas of dense fog after 4am.  Otherwise, partly cloudy, with a low around 28. Calm wind.

    Low: 28 °F

    Areas Dense
    Fog

  • M.L.King Day

    M.L.King Day: Areas of dense fog before 10am.  Otherwise, sunny, with a high near 49. Calm wind.

    High: 49 °F

    Areas Dense
    Fog then
    Sunny

  • Monday Night

    Monday Night: Patchy dense fog before 2am, then areas of dense fog after 4am.  Otherwise, partly cloudy, with a low around 28. Calm wind.

    Low: 28 °F

    Areas Dense
    Fog

  • Tuesday

    Tuesday: Areas of dense fog before 10am.  Otherwise, mostly sunny, with a high near 48. Calm wind.

    High: 48 °F

    Areas Dense
    Fog then
    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Patchy dense fog before 1am, then areas of dense fog after 5am.  Otherwise, partly cloudy, with a low around 29. Calm wind.

    Low: 29 °F

    Areas Dense
    Fog

  • Wednesday

    Wednesday: Areas of dense fog before 10am.  Otherwise, partly sunny, with a high near 47.

    High: 47 °F

    Areas Dense
    Fog then
    Partly Sunny

  • Wednesday Night

    Wednesday Night: Patchy fog after 10pm.  Otherwise, mostly cloudy, with a low around 32.

    Low: 32 °F

    Patchy Fog

  • Thursday

    Thursday: A slight chance of rain after 10am.  Mostly cloudy, with a high near 45.

    High: 45 °F

    Slight Chance
    Rain

  • Thursday Night

    Thursday Night: A chance of rain, mainly after 10pm.  Mostly cloudy, with a low around 35.

    Low: 35 °F

    Chance Rain

Detailed Forecast

Tonight
Patchy dense fog before 2am, then areas of dense fog after 4am. Otherwise, partly cloudy, with a low around 28. Calm wind.
M.L.King Day
Areas of dense fog before 10am. Otherwise, sunny, with a high near 49. Calm wind.
Monday Night
Patchy dense fog before 2am, then areas of dense fog after 4am. Otherwise, partly cloudy, with a low around 28. Calm wind.
Tuesday
Areas of dense fog before 10am. Otherwise, mostly sunny, with a high near 48. Calm wind.
Tuesday Night
Patchy dense fog before 1am, then areas of dense fog after 5am. Otherwise, partly cloudy, with a low around 29. Calm wind.
Wednesday
Areas of dense fog before 10am. Otherwise, partly sunny, with a high near 47.
Wednesday Night
Patchy fog after 10pm. Otherwise, mostly cloudy, with a low around 32.
Thursday
A slight chance of rain after 10am. Mostly cloudy, with a high near 45.
Thursday Night
A chance of rain, mainly after 10pm. Mostly cloudy, with a low around 35.
Friday
A chance of rain. Mostly cloudy, with a high near 45.
Friday Night
A chance of rain and snow. Mostly cloudy, with a low around 35.
Saturday
A chance of rain and snow. Mostly cloudy, with a high near 45.
Saturday Night
A chance of rain and snow. Mostly cloudy, with a low around 35.
Sunday
Rain likely, possibly mixed with snow. Mostly cloudy, with a high near 46.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles ENE Napavine WA
 46.59°N 122.86°W (Elev. 400 ft)
7:01 pm PST Jan 18, 2026
11pm PST Jan 18, 2026-6pm PST Jan 25, 2026
 
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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