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Sinlaku Continues to Impact the Marianas; Severe Weather for the Central Plains and Northeast; Record Warmth for mid-Atlantic to Southeast

Sinlaku continues to affect the Marianas as it moves north through Friday. Meanwhile, severe thunderstorms are expected from the Northeast to the Mid-Mississippi Valley today and for the Central/Southern Plains on Friday. Considerable flooding impacts are ongoing in the Upper Great Lakes, and expected to continue through the weekend. Fire weather concerns persist in the Plains. Read More >

Current conditions at

Olympia, Olympia Airport (KOLM)

Lat: 46.97333°NLon: 122.90333°WElev: 203.0ft.

Clear

39°F

4°C

Humidity 86%
Wind Speed WSW 3 MPH
Barometer 30.24 in (1024.04 mb)
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Last update 16 Apr 09:00 AM PDT
Extended Forecast for

Tumwater WA

  • Today

    Today: Mostly sunny, with a high near 57. Light south southwest wind becoming west southwest 5 to 10 mph in the morning.

    High: 57 °F

    Mostly Sunny

  • Tonight

    Tonight: Patchy frost after 3am. Otherwise, mostly clear, with a low around 34. West southwest wind 5 to 10 mph becoming light south southwest after midnight.

    Low: 34 °F

    Mostly Clear
    then Patchy
    Frost

  • Friday

    Friday: Patchy frost before 8am. Otherwise, partly sunny, with a high near 59. Calm wind.

    High: 59 °F

    Patchy Frost
    then Partly
    Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 37. North northeast wind around 5 mph becoming calm in the evening.

    Low: 37 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 66. Calm wind becoming south southeast around 5 mph in the afternoon.

    High: 66 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: A 40 percent chance of rain. Mostly cloudy, with a low around 45.

    Low: 45 °F

    Chance Rain

  • Sunday

    Sunday: A 40 percent chance of rain. Mostly cloudy, with a high near 66.

    High: 66 °F

    Chance Rain

  • Sunday Night

    Sunday Night: A slight chance of rain. Mostly cloudy, with a low around 44.

    Low: 44 °F

    Slight Chance
    Rain

  • Monday

    Monday: A slight chance of rain. Partly sunny, with a high near 68.

    High: 68 °F

    Slight Chance
    Rain

Detailed Forecast

Today
Mostly sunny, with a high near 57. Light south southwest wind becoming west southwest 5 to 10 mph in the morning.
Tonight
Patchy frost after 3am. Otherwise, mostly clear, with a low around 34. West southwest wind 5 to 10 mph becoming light south southwest after midnight.
Friday
Patchy frost before 8am. Otherwise, partly sunny, with a high near 59. Calm wind.
Friday Night
Mostly cloudy, with a low around 37. North northeast wind around 5 mph becoming calm in the evening.
Saturday
Mostly cloudy, with a high near 66. Calm wind becoming south southeast around 5 mph in the afternoon.
Saturday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 45.
Sunday
A 40 percent chance of rain. Mostly cloudy, with a high near 66.
Sunday Night
A slight chance of rain. Mostly cloudy, with a low around 44.
Monday
A slight chance of rain. Partly sunny, with a high near 68.
Monday Night
A chance of rain, mainly before 11pm. Mostly cloudy, with a low around 46.
Tuesday
A chance of rain. Mostly cloudy, with a high near 60.
Tuesday Night
A chance of rain. Mostly cloudy, with a low around 44.
Wednesday
A chance of rain. Partly sunny, with a high near 59.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Tumwater WA
 46.97°N 122.92°W (Elev. 200 ft)
Last Update:
1:20 am PDT Apr 16, 2026
Forecast Valid:
9am PDT Apr 16, 2026-6pm PDT Apr 22, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation