Severe Thunderstorms and Heavy Rainfall for the Southwest; Heat Spreads Across the Center of the Nation

Moisture will continue to move into areas of the West. This will increase showers and thunderstorms coverage and intensity, with the risk of flash flooding and damaging wind gusts. Meanwhile, heat across the Southwest will expand into the center of the nation this weekend into early next week. Trends favor this heat will spread across the Ohio Valley, mid-Atlantic next week. Read More >

Current conditions at

DW8787 CHEHALIS (D8787)

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

NA

57°F

14°C

Humidity 83%
Wind Speed NW 0 MPH
Barometer 30.11 in (1019.64 mb)
Dewpoint 52°F (11°C)
Visibility NA
Last update 29 Aug 08:15 PM PDT
Extended Forecast for

5 Miles SE Onalaska WA

  • Tonight

    Tonight: Patchy fog after midnight.  Otherwise, increasing clouds, with a low around 46. Calm wind.

    Low: 46 °F

    Partly Cloudy
    then Patchy
    Fog

  • Sunday

    Sunday: Areas of fog before noon.  Otherwise, cloudy through mid morning, then gradual clearing, with a high near 71. Calm wind.

    High: 71 °F

    Areas Fog
    then Mostly
    Sunny

  • Sunday Night

    Sunday Night: Patchy fog after 1am.  Otherwise, partly cloudy, with a low around 46. Calm wind.

    Low: 46 °F

    Mostly Clear
    then Patchy
    Fog

  • Monday

    Monday: Areas of fog before 9am.  Otherwise, mostly sunny, with a high near 79. Calm wind.

    High: 79 °F

    Areas Fog
    then Mostly
    Sunny

  • Monday Night

    Monday Night: Patchy fog after 1am.  Otherwise, mostly cloudy, with a low around 50. Calm wind.

    Low: 50 °F

    Mostly Cloudy
    then Patchy
    Fog

  • Tuesday

    Tuesday: A 30 percent chance of showers and thunderstorms after 11am.  Areas of fog before 10am.  Otherwise, mostly cloudy, with a high near 73.

    High: 73 °F

    Chance
    Showers and
    Areas Fog

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms before 11pm, then a chance of rain after 11pm.  Mostly cloudy, with a low around 50. Chance of precipitation is 50%.

    Low: 50 °F

    Chance
    Showers

  • Wednesday

    Wednesday: Rain likely, then showers and possibly a thunderstorm after 11am.  Cloudy, with a high near 65.

    High: 65 °F

    Showers

  • Wednesday Night

    Wednesday Night: Rain.  Cloudy, with a low around 48.

    Low: 48 °F

    Rain

Detailed Forecast

Tonight
Patchy fog after midnight. Otherwise, increasing clouds, with a low around 46. Calm wind.
Sunday
Areas of fog before noon. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 71. Calm wind.
Sunday Night
Patchy fog after 1am. Otherwise, partly cloudy, with a low around 46. Calm wind.
Monday
Areas of fog before 9am. Otherwise, mostly sunny, with a high near 79. Calm wind.
Monday Night
Patchy fog after 1am. Otherwise, mostly cloudy, with a low around 50. Calm wind.
Tuesday
A 30 percent chance of showers and thunderstorms after 11am. Areas of fog before 10am. Otherwise, mostly cloudy, with a high near 73.
Tuesday Night
A chance of showers and thunderstorms before 11pm, then a chance of rain after 11pm. Mostly cloudy, with a low around 50. Chance of precipitation is 50%.
Wednesday
Rain likely, then showers and possibly a thunderstorm after 11am. Cloudy, with a high near 65.
Wednesday Night
Rain. Cloudy, with a low around 48.
Thursday
Rain likely. Mostly cloudy, with a high near 67.
Thursday Night
A chance of rain. Mostly cloudy, with a low around 47.
Friday
A chance of rain. Partly sunny, with a high near 70.
Friday Night
A slight chance of rain. Mostly cloudy, with a low around 47.
Saturday
A chance of rain. Mostly cloudy, with a high near 72.
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SE Onalaska WA
 46.53°N 122.63°W (Elev. 600 ft)
12:20 pm PDT Aug 29, 2026
8pm PDT Aug 29, 2026-6pm PDT Sep 5, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database