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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

Renton Municipal Airport (KRNT)

Lat: 47.49509°NLon: 122.21437°WElev: 23.0ft.

Mostly Cloudy

37°F

3°C

Humidity 92%
Wind Speed S 5 MPH
Barometer 30.21 in (1023.03 mb)
Dewpoint 35°F (2°C)
Visibility 10.00 mi
Wind Chill33°F (1°C)
Last update 16 Apr 07:07 AM PDT
Extended Forecast for

Newcastle WA

  • Today

    Today: Patchy frost before 8am. Otherwise, mostly sunny, with a high near 56. Light and variable wind becoming southwest around 6 mph in the morning.

    High: 56 °F

    Patchy Frost
    then Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 39. South southeast wind 3 to 6 mph.

    Low: 39 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 57. Light and variable wind.

    High: 57 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 41. North northwest wind around 5 mph becoming calm in the evening.

    Low: 41 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 66. Light and variable wind.

    High: 66 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: A 20 percent chance of rain after 11pm. Mostly cloudy, with a low around 49.

    Low: 49 °F

    Slight Chance
    Rain

  • Sunday

    Sunday: A 30 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 before 11pm. Mostly cloudy, with a low around 48.

    Low: 48 °F

    Slight Chance
    Rain then
    Mostly Cloudy

  • Monday

    Monday: A slight chance of rain. Partly sunny, with a high near 67.

    High: 67 °F

    Slight Chance
    Rain

Detailed Forecast

Today
Patchy frost before 8am. Otherwise, mostly sunny, with a high near 56. Light and variable wind becoming southwest around 6 mph in the morning.
Tonight
Mostly cloudy, with a low around 39. South southeast wind 3 to 6 mph.
Friday
Mostly sunny, with a high near 57. Light and variable wind.
Friday Night
Mostly cloudy, with a low around 41. North northwest wind around 5 mph becoming calm in the evening.
Saturday
Mostly cloudy, with a high near 66. Light and variable wind.
Saturday Night
A 20 percent chance of rain after 11pm. Mostly cloudy, with a low around 49.
Sunday
A 30 percent chance of rain. Mostly cloudy, with a high near 66.
Sunday Night
A slight chance of rain before 11pm. Mostly cloudy, with a low around 48.
Monday
A slight chance of rain. Partly sunny, with a high near 67.
Monday Night
A chance of rain, mainly before 11pm. Mostly cloudy, with a low around 49.
Tuesday
A chance of rain. Partly sunny, with a high near 61.
Tuesday Night
A chance of rain. Mostly cloudy, with a low around 48.
Wednesday
A chance of rain. Mostly cloudy, with a high near 56.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Newcastle WA
 47.52°N 122.17°W (Elev. 400 ft)
Last Update:
1:20 am PDT Apr 16, 2026
Forecast Valid:
7am PDT Apr 16, 2026-6pm PDT Apr 22, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation