Thunderstorms and Heavy Rain in the Mid-South; Heat Continues in the Southeast and Southwest

Severe thunderstorms and heavy rain are expected across portions of the mid-Mississippi Valley into the Ohio Valley and portions of Arizona. Dangerous heat persists in the South and Southeast while building into the Southwest. Overnight lows will be so warm that, when combined with oppressive dew points, little-to-no relief from the scorching daytime highs will be available. Read More >

Current conditions at

CHEHALIS (CLSW1)

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

NA

55°F

13°C

Humidity 92%
Wind Speed SSE 0 MPH
Barometer NA
Dewpoint 53°F (12°C)
Visibility NA
Last update 19 Aug 01:09 AM PDT
Extended Forecast for

5 Miles SE Napavine WA

  • Overnight

    Overnight: Increasing clouds, with a steady temperature around 54. Calm wind.

    Low: 54 °F

    Increasing
    Clouds

  • Wednesday

    Wednesday: Cloudy, then gradually becoming mostly sunny, with a high near 79. Calm wind.

    High: 79 °F

    Decreasing
    Clouds

  • Wednesday Night

    Wednesday Night: Increasing clouds, with a low around 53. Calm wind.

    Low: 53 °F

    Increasing
    Clouds

  • Thursday

    Thursday: Mostly cloudy through mid morning, then gradual clearing, with a high near 84. Calm wind.

    High: 84 °F

    Becoming
    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 55. Calm wind.

    Low: 55 °F

    Mostly Clear

  • Friday

    Friday: Mostly cloudy, with a high near 83.

    High: 83 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: A 20 percent chance of rain after 11pm.  Mostly cloudy, with a low around 55.

    Low: 55 °F

    Slight Chance
    Rain

  • Saturday

    Saturday: A chance of rain before 11am.  Mostly cloudy, with a high near 70.

    High: 70 °F

    Chance Rain
    then Mostly
    Cloudy

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 53.

    Low: 53 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Increasing clouds, with a steady temperature around 54. Calm wind.
Wednesday
Cloudy, then gradually becoming mostly sunny, with a high near 79. Calm wind.
Wednesday Night
Increasing clouds, with a low around 53. Calm wind.
Thursday
Mostly cloudy through mid morning, then gradual clearing, with a high near 84. Calm wind.
Thursday Night
Mostly clear, with a low around 55. Calm wind.
Friday
Mostly cloudy, with a high near 83.
Friday Night
A 20 percent chance of rain after 11pm. Mostly cloudy, with a low around 55.
Saturday
A chance of rain before 11am. Mostly cloudy, with a high near 70.
Saturday Night
Mostly cloudy, with a low around 53.
Sunday
Mostly cloudy, with a high near 74.
Sunday Night
Mostly clear, with a low around 52.
Monday
Partly sunny, with a high near 80.
Monday Night
Partly cloudy, with a low around 52.
Tuesday
Partly sunny, with a high near 76.
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SE Napavine WA
 46.53°N 122.81°W (Elev. 417 ft)
11:26 pm PDT Aug 18, 2026
1am PDT Aug 19, 2026-6pm PDT Aug 25, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database