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

Super Typhoon Sinlaku will bring destructive winds, widespread heavy rain/flooding, and thunderstorms to the Marianas Islands into Wednesday. Tropical Storm conditions are likely over Guam. Severe thunderstorms and heavy rain are likely across the Upper Mississippi Valley and Great Lakes region with potential for large to very large hail, damaging wind, and tornadoes through Tuesday. Read More >

Current conditions at

Renton Municipal Airport (KRNT)

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

Overcast

55°F

13°C

Humidity 54%
Wind Speed SSW 12 MPH
Barometer 30.06 in (1017.95 mb)
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Last update 13 Apr 12:35 PM PDT
Extended Forecast for

Newcastle WA

  • This Afternoon

    This Afternoon: A 30 percent chance of rain, mainly after 3pm.  Mostly cloudy, with a high near 52. Southwest wind around 9 mph.

    High: 52 °F

    Chance Rain

  • Tonight

    Tonight: A 50 percent chance of rain, mainly between midnight and 5am.  Mostly cloudy, with a low around 43. South wind around 10 mph.

    Low: 43 °F

    Chance Rain

  • Tuesday

    Tuesday: Rain, mainly after 9am.  High near 47. South southwest wind 11 to 15 mph, with gusts as high as 20 mph.  Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    High: 47 °F

    Rain

  • Tuesday Night

    Tuesday Night: Rain before 2am, then rain likely, possibly mixed with snow.  Low around 38. Southeast wind 7 to 15 mph, with gusts as high as 20 mph.  Chance of precipitation is 100%. Little or no snow accumulation expected.

    Low: 38 °F

    Rain then
    Rain/Snow
    Likely

  • Wednesday

    Wednesday: A chance of rain and snow before 8am, then rain. Some thunder is also possible.  High near 48. South southeast wind 5 to 7 mph becoming southwest in the morning.  Chance of precipitation is 80%. Little or no snow accumulation expected.

    High: 48 °F

    Rain/Snow
    then Showers

  • Wednesday Night

    Wednesday Night: Rain likely before 11pm.  Mostly cloudy, with a low around 35. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 35 °F

    Rain Likely
    then Mostly
    Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 53.

    High: 53 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 39.

    Low: 39 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 54.

    High: 54 °F

    Partly Sunny

Detailed Forecast

This Afternoon
A 30 percent chance of rain, mainly after 3pm. Mostly cloudy, with a high near 52. Southwest wind around 9 mph.
Tonight
A 50 percent chance of rain, mainly between midnight and 5am. Mostly cloudy, with a low around 43. South wind around 10 mph.
Tuesday
Rain, mainly after 9am. High near 47. South southwest wind 11 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Tuesday Night
Rain before 2am, then rain likely, possibly mixed with snow. Low around 38. Southeast wind 7 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 100%. Little or no snow accumulation expected.
Wednesday
A chance of rain and snow before 8am, then rain. Some thunder is also possible. High near 48. South southeast wind 5 to 7 mph becoming southwest in the morning. Chance of precipitation is 80%. Little or no snow accumulation expected.
Wednesday Night
Rain likely before 11pm. Mostly cloudy, with a low around 35. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday
Mostly sunny, with a high near 53.
Thursday Night
Partly cloudy, with a low around 39.
Friday
Partly sunny, with a high near 54.
Friday Night
Mostly cloudy, with a low around 39.
Saturday
Mostly cloudy, with a high near 59.
Saturday Night
A chance of rain. Mostly cloudy, with a low around 44.
Sunday
A chance of rain. Mostly cloudy, with a high near 55.
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ABOUT THIS FORECAST

 
Point Forecast:
Newcastle WA
 47.53°N 122.14°W (Elev. 873 ft)
11:27 am PDT Apr 13, 2026
12pm PDT Apr 13, 2026-6pm PDT Apr 19, 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