Super Typhoon Sinlaku to Impact the Marianas and Guam; Severe Weather Threat 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 the Northern Mariana Islands. Severe thunderstorms and heavy rain are expected from the Southern Plains to the Great Lakes through Tuesday. Heavy snow is expected in the Pacific Northwest. Read More >

Current conditions at

Renton Municipal Airport (KRNT)

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

Overcast

48°F

9°C

Humidity 65%
Wind Speed S 10 MPH
Barometer 30.07 in (1018.29 mb)
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Wind Chill44°F (7°C)
Last update 14 Apr 03:38 AM PDT
Extended Forecast for

Newcastle WA

  • Overnight

    Overnight: A 40 percent chance of rain, mainly before 5am.  Mostly cloudy, with a low around 44. South wind around 10 mph.

    Low: 44 °F

    Chance Rain

  • Tuesday

    Tuesday: Rain, mainly after 9am.  High near 48. South southwest wind 11 to 15 mph, with gusts as high as 25 mph.  Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    High: 48 °F

    Rain

  • Tuesday Night

    Tuesday Night: Rain and snow before 4am, then a slight chance of snow after 5am.  Low around 38. South southwest wind 5 to 15 mph becoming east southeast after midnight. Winds could gust as high as 25 mph.  Chance of precipitation is 100%. Little or no snow accumulation expected.

    Low: 38 °F

    Rain then
    Chance
    Rain/Snow

  • Wednesday

    Wednesday: A chance of rain and snow showers before 8am, then rain showers. Some thunder is also possible.  High near 49. South southeast wind 5 to 7 mph becoming southwest in the afternoon.  Chance of precipitation is 90%. Little or no snow accumulation expected.

    High: 49 °F

    Rain/Snow
    then Showers

  • Wednesday Night

    Wednesday Night: Rain likely before 11pm.  Mostly cloudy, with a low around 36. 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: 36 °F

    Rain Likely
    then Mostly
    Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 55.

    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

Detailed Forecast

Overnight
A 40 percent chance of rain, mainly before 5am. Mostly cloudy, with a low around 44. South wind around 10 mph.
Tuesday
Rain, mainly after 9am. High near 48. South southwest wind 11 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Tuesday Night
Rain and snow before 4am, then a slight chance of snow after 5am. Low around 38. South southwest wind 5 to 15 mph becoming east southeast after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 100%. Little or no snow accumulation expected.
Wednesday
A chance of rain and snow showers before 8am, then rain showers. Some thunder is also possible. High near 49. South southeast wind 5 to 7 mph becoming southwest in the afternoon. Chance of precipitation is 90%. Little or no snow accumulation expected.
Wednesday Night
Rain likely before 11pm. Mostly cloudy, with a low around 36. 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.
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. Mostly cloudy, with a low around 47.
Sunday
Rain likely. Mostly cloudy, with a high near 60.
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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ABOUT THIS FORECAST

 
Point Forecast:
Newcastle WA
 47.52°N 122.17°W (Elev. 400 ft)
11:27 pm PDT Apr 13, 2026
4am PDT Apr 14, 2026-6pm PDT Apr 20, 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