Sinlaku Continues to Impact the Marianas; Severe Weather from the Central US to the Northeast; Late-Season Snow in the Northwest

Sinlaku continues to bring destructive winds, widespread heavy rain/flooding, and storm surge to the Marianas. Showers and severe thunderstorms are expected from the Northeast to the Mid-Mississippi Valley and to the Central/Southern Plains through Thursday. A front will produce late-season snowfall over the Cascades and Northern Rockies and coastal rain over the Northwest Coast through Thursday. Read More >

Current conditions at

Renton Municipal Airport (KRNT)

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

Rain

43°F

6°C

Humidity 81%
Wind Speed SE 4 MPH
Barometer 29.87 in (1011.51 mb)
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Wind Chill41°F (5°C)
Last update 15 Apr 12:40 PM PDT
Extended Forecast for

Newcastle WA

  • This Afternoon

    This Afternoon: Showers and thunderstorms likely, then showers and possibly a thunderstorm after 3pm.  High near 48. Southwest wind around 7 mph.  Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 48 °F

    Showers

  • Tonight

    Tonight: Rain and snow before 11pm, then a slight chance of rain between 11pm and midnight. Some thunder is also possible.  Low around 36. Light and variable wind.  Chance of precipitation is 80%. Little or no snow accumulation expected.

    Low: 36 °F

    Rain/Snow
    then Mostly
    Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 56. South southwest wind 3 to 6 mph.

    High: 56 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 40. Southwest wind around 6 mph.

    Low: 40 °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 42.

    Low: 42 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 65.

    High: 65 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 47.

    Low: 47 °F

    Mostly Cloudy

  • Sunday

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

    High: 66 °F

    Slight Chance
    Rain

Detailed Forecast

This Afternoon
Showers and thunderstorms likely, then showers and possibly a thunderstorm after 3pm. High near 48. Southwest wind around 7 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tonight
Rain and snow before 11pm, then a slight chance of rain between 11pm and midnight. Some thunder is also possible. Low around 36. Light and variable wind. Chance of precipitation is 80%. Little or no snow accumulation expected.
Thursday
Mostly sunny, with a high near 56. South southwest wind 3 to 6 mph.
Thursday Night
Mostly cloudy, with a low around 40. Southwest wind around 6 mph.
Friday
Mostly sunny, with a high near 57. Light and variable wind.
Friday Night
Mostly cloudy, with a low around 42.
Saturday
Mostly cloudy, with a high near 65.
Saturday Night
Mostly cloudy, with a low around 47.
Sunday
A slight chance of rain. Mostly cloudy, with a high near 66.
Sunday Night
Mostly cloudy, with a low around 48.
Monday
Partly sunny, with a high near 68.
Monday Night
Partly cloudy, with a low around 50.
Tuesday
A slight chance of rain. Partly sunny, with a high near 64.
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ABOUT THIS FORECAST

 
Point Forecast:
Newcastle WA
 47.52°N 122.17°W (Elev. 400 ft)
11:28 am PDT Apr 15, 2026
1pm PDT Apr 15, 2026-6pm PDT Apr 21, 2026
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database