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Super Typhoon Sinlaku to Impact the Marianas and Guam; Severe Weather from the Southern Plains to the Great Lakes

Super Typhoon Sinlaku will bring destructive winds, widespread heavy rain/flooding, thunderstorms, and coastal impacts to the Marianas Islands into Wednesday. Typhoon conditions are likely over CNMI and tropical storm conditions over Guam. Severe thunderstorms and heavy rain are expected from the Southern Plains to the Great Lakes today. Read More >

Current conditions at

Renton Municipal Airport (KRNT)

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

Rain

47°F

8°C

Humidity 76%
Wind Speed S 6 MPH
Barometer 30.04 in (1017.27 mb)
Dewpoint 40°F (4°C)
Visibility 10.00 mi
Wind Chill44°F (7°C)
Last update 14 Apr 05:53 AM PDT
Extended Forecast for

Newcastle WA

  • Today

    Today: Rain, mainly after 9am. Steady temperature around 46. South southwest wind 11 to 15 mph, with gusts as high as 26 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    High: 46 °F

    Rain

  • Tonight

    Tonight: Rain, possibly mixing with snow after 2am, then gradually ending. Low around 38. South southwest wind 11 to 16 mph becoming south southeast 5 to 10 mph after midnight. Winds could gust as high as 26 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.

    Low: 38 °F

    Rain then
    Chance
    Rain/Snow

  • Wednesday

    Wednesday: A chance of rain, then showers and possibly a thunderstorm after 11am. High near 49. Southwest wind 5 to 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: 49 °F

    Showers

  • Wednesday Night

    Wednesday Night: Rain likely before 11pm. Mostly cloudy, with a low around 37. West southwest wind around 6 mph becoming light and variable in the evening. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 37 °F

    Rain Likely
    then Mostly
    Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 55. Southwest wind around 5 mph.

    High: 55 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 40.

    Low: 40 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 55.

    High: 55 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 39.

    Low: 39 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 64.

    High: 64 °F

    Partly Sunny

Detailed Forecast

Today
Rain, mainly after 9am. Steady temperature around 46. South southwest wind 11 to 15 mph, with gusts as high as 26 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Tonight
Rain, possibly mixing with snow after 2am, then gradually ending. Low around 38. South southwest wind 11 to 16 mph becoming south southeast 5 to 10 mph after midnight. Winds could gust as high as 26 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.
Wednesday
A chance of rain, then showers and possibly a thunderstorm after 11am. High near 49. Southwest wind 5 to 7 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
Rain likely before 11pm. Mostly cloudy, with a low around 37. West southwest wind around 6 mph becoming light and variable in the evening. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Thursday
Mostly sunny, with a high near 55. Southwest wind around 5 mph.
Thursday Night
Mostly cloudy, with a low around 40.
Friday
Partly sunny, with a high near 55.
Friday Night
Mostly cloudy, with a low around 39.
Saturday
Partly sunny, with a high near 64.
Saturday Night
A chance of rain, mainly after 11pm. Mostly cloudy, with a low around 48.
Sunday
Rain likely. Mostly cloudy, with a high near 59.
Sunday Night
Rain likely. Mostly cloudy, with a low around 45.
Monday
A chance of rain. Partly sunny, with a high near 59.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Newcastle WA
 47.54°N 122.17°W (Elev. 397 ft)
Last Update:
11:27 pm PDT Apr 13, 2026
Forecast Valid:
6am PDT Apr 14, 2026-6pm PDT Apr 20, 2026
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation