Thunderstorms and Heavy Rainfall in the Plains; Hazardous Heat in the South and Southeast

Severe thunderstorms will be possible across the northern/central Plains through Tuesday afternoon and from the central Plains to the Mid-Mississippi Valley Tuesday evening through Wednesday morning. Storms may produce large hail and damaging wind gusts, and heavy rainfall may lead to scattered instances of flash flooding. Meanwhile, hazardous heat persists across the South and Southeast. Read More >

Current conditions at

Chehalis-Centralia Airport (KCLS)

Lat: 46.677°NLon: 122.9827°WElev: 177.0ft.

haze

81°F

27°C

Humidity 47%
Wind Speed NW 5 MPH
Barometer 30.05 in (1017.61 mb)
Dewpoint 59°F (15°C)
Visibility 6.00 mi
Heat Index81°F (27°C)
Last update 17 Aug 06:15 PM PDT
Extended Forecast for

Chehalis WA

  • Tonight

    Tonight: Patchy fog after 11pm.  Otherwise, increasing clouds, with a low around 54. Northwest wind around 6 mph becoming calm  in the evening.

    Low: 54 °F

    Patchy Fog

  • Tuesday

    Tuesday: Patchy fog before 10am.  Otherwise, cloudy through mid morning, then gradual clearing, with a high near 79. Calm wind becoming west 5 to 7 mph in the afternoon.

    High: 79 °F

    Patchy Fog
    then Mostly
    Sunny

  • Tuesday Night

    Tuesday Night: Increasing clouds, with a low around 55. West northwest wind 5 to 7 mph becoming calm  in the evening.

    Low: 55 °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: Partly cloudy, with a low around 54. Light north wind.

    Low: 54 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 85.

    High: 85 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 56.

    Low: 56 °F

    Partly Cloudy

  • Friday

    Friday: A slight chance of rain before 11am.  Mostly cloudy, with a high near 79.

    High: 79 °F

    Slight Chance
    Rain then
    Mostly Cloudy

  • Friday Night

    Friday Night: A slight chance of rain.  Mostly cloudy, with a low around 56.

    Low: 56 °F

    Slight Chance
    Rain

Detailed Forecast

Tonight
Patchy fog after 11pm. Otherwise, increasing clouds, with a low around 54. Northwest wind around 6 mph becoming calm in the evening.
Tuesday
Patchy fog before 10am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 79. Calm wind becoming west 5 to 7 mph in the afternoon.
Tuesday Night
Increasing clouds, with a low around 55. West northwest wind 5 to 7 mph becoming calm in the evening.
Wednesday
Cloudy, then gradually becoming mostly sunny, with a high near 79. Calm wind.
Wednesday Night
Partly cloudy, with a low around 54. Light north wind.
Thursday
Mostly sunny, with a high near 85.
Thursday Night
Partly cloudy, with a low around 56.
Friday
A slight chance of rain before 11am. Mostly cloudy, with a high near 79.
Friday Night
A slight chance of rain. Mostly cloudy, with a low around 56.
Saturday
A slight chance of rain. Cloudy, with a high near 72.
Saturday Night
Mostly cloudy, with a low around 55.
Sunday
Mostly cloudy, with a high near 77.
Sunday Night
Partly cloudy, with a low around 54.
Monday
Partly sunny, with a high near 79.
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ABOUT THIS FORECAST

 
Point Forecast:
Chehalis WA
 46.68°N 122.98°W (Elev. 180 ft)
11:26 am PDT Aug 17, 2026
6pm PDT Aug 17, 2026-6pm PDT Aug 24, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database