Heat and Fire Weather Concerns West; Heavy Rain and Thunderstorms from Plains to mid-Atlantic

Thunderstorms and locally heavy rainfall is expected from the Central Plains to the Ohio Valley, mid-Atlantic and across the Southeast. Severe weather from the Upper Midwest to Central Plains increases on Friday. Major to Extreme HeatRisk continues across the Southern Plains to the lower Mississippi Valley late this week. Fire weather concerns for the northern Rockies and northern Plains today. Read More >

Current conditions at

DW8787 CHEHALIS (D8787)

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

NA

53°F

12°C

Humidity 97%
Wind Speed NNE 0 MPH
Barometer 30.05 in (1017.61 mb)
Dewpoint 52°F (11°C)
Visibility NA
Last update 10 Sep 05:15 AM PDT
Extended Forecast for

Onalaska WA

  • Today

    Today: Patchy fog between 7am and 8am.  Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 70. Calm wind becoming west northwest around 5 mph in the afternoon.

    High: 70 °F

    Patchy Fog
    then Mostly
    Cloudy

  • Tonight

    Tonight: Increasing clouds, with a low around 47. Light and variable wind.

    Low: 47 °F

    Increasing
    Clouds

  • Friday

    Friday: Cloudy, with a high near 67. Calm wind.

    High: 67 °F

    Cloudy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 48. Calm wind.

    Low: 48 °F

    Mostly Cloudy

  • Saturday

    Saturday: A chance of rain before 2pm, then a chance of showers and thunderstorms between 2pm and 5pm, then showers likely and possibly a thunderstorm after 5pm.  Mostly cloudy, with a high near 65. Calm wind.  Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 65 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: Showers likely and possibly a thunderstorm before 8pm, then rain likely, mainly between 8pm and 11pm.  Patchy fog between 8pm and 2am.  Otherwise, mostly cloudy, with a low around 47. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 47 °F

    Showers
    Likely and
    Patchy Fog

  • Sunday

    Sunday: A 30 percent chance of rain, mainly before 11am.  Mostly cloudy, with a high near 65.

    High: 65 °F

    Chance Rain

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 47.

    Low: 47 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 72.

    High: 72 °F

    Mostly Sunny

Detailed Forecast

Today
Patchy fog between 7am and 8am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 70. Calm wind becoming west northwest around 5 mph in the afternoon.
Tonight
Increasing clouds, with a low around 47. Light and variable wind.
Friday
Cloudy, with a high near 67. Calm wind.
Friday Night
Mostly cloudy, with a low around 48. Calm wind.
Saturday
A chance of rain before 2pm, then a chance of showers and thunderstorms between 2pm and 5pm, then showers likely and possibly a thunderstorm after 5pm. Mostly cloudy, with a high near 65. Calm wind. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday Night
Showers likely and possibly a thunderstorm before 8pm, then rain likely, mainly between 8pm and 11pm. Patchy fog between 8pm and 2am. Otherwise, mostly cloudy, with a low around 47. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday
A 30 percent chance of rain, mainly before 11am. Mostly cloudy, with a high near 65.
Sunday Night
Partly cloudy, with a low around 47.
Monday
Mostly sunny, with a high near 72.
Monday Night
Mostly clear, with a low around 48.
Tuesday
Sunny, with a high near 76.
Tuesday Night
Mostly clear, with a low around 50.
Wednesday
Sunny, with a high near 81.
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ABOUT THIS FORECAST

 
Point Forecast:
Onalaska WA
 46.58°N 122.74°W (Elev. 600 ft)
12:45 am PDT Sep 10, 2026
5am PDT Sep 10, 2026-6pm PDT Sep 16, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database