Severe Thunderstorm and Flash Flood Threats Continue into the Weekend

Severe thunderstorms are expected from the southern Plains to the Midwest through Friday night. Severe storm hazards may include large hail, severe winds, and tornadoes, some of which may be strong. There will be another chance for severe thunderstorms on Saturday for portions of Texas, the Lower Mississippi Valley, and the Ohio Valley. Storms could result in locally heavy rain and flash flooding. Read More >

Current conditions at

Renton Municipal Airport (KRNT)

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

Rain

52°F

11°C

Humidity 81%
Wind Speed S 10 MPH
Barometer 30.33 in (1027.09 mb)
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Last update 06 Mar 01:35 PM PST
Extended Forecast for

Newcastle WA

  • This Afternoon

    This Afternoon: Rain.  High near 48. South wind around 8 mph.  Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    High: 48 °F

    Rain

  • Tonight

    Tonight: Rain likely.  Cloudy, with a low around 47. South wind around 9 mph.  Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 47 °F

    Rain Likely

  • Saturday

    Saturday: Rain likely, mainly before 1pm.  Cloudy, with a high near 52. South southwest wind around 11 mph, with gusts as high as 21 mph.  Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 52 °F

    Rain Likely

  • Saturday Night

    Saturday Night: Rain, mainly after 10pm.  Low around 47. South southwest wind 10 to 14 mph, with gusts as high as 22 mph.  Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 47 °F

    Rain

  • Sunday

    Sunday: Rain.  High near 50. West southwest wind 9 to 11 mph, with gusts as high as 20 mph.  Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 50 °F

    Rain

  • Sunday Night

    Sunday Night: Snow likely, possibly mixed with rain.  Mostly cloudy, with a low around 35. Chance of precipitation is 70%. Little or no snow accumulation expected.

    Low: 35 °F

    Rain/Snow
    Likely

  • Monday

    Monday: Rain and snow before 1pm, then rain between 1pm and 4pm, then rain and snow after 4pm.  High near 44. Chance of precipitation is 90%. Little or no snow accumulation expected.

    High: 44 °F

    Rain/Snow

  • Monday Night

    Monday Night: Snow, possibly mixed with rain, becoming all snow after 10pm.  Mostly cloudy, with a low around 34.

    Low: 34 °F

    Rain/Snow
    then Snow
    Likely

  • Tuesday

    Tuesday: Rain, possibly mixed with snow, becoming all rain after 4pm.  Cloudy, with a high near 44.

    High: 44 °F

    Rain/Snow

Detailed Forecast

This Afternoon
Rain. High near 48. South wind around 8 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Tonight
Rain likely. Cloudy, with a low around 47. South wind around 9 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday
Rain likely, mainly before 1pm. Cloudy, with a high near 52. South southwest wind around 11 mph, with gusts as high as 21 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Saturday Night
Rain, mainly after 10pm. Low around 47. South southwest wind 10 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday
Rain. High near 50. West southwest wind 9 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday Night
Snow likely, possibly mixed with rain. Mostly cloudy, with a low around 35. Chance of precipitation is 70%. Little or no snow accumulation expected.
Monday
Rain and snow before 1pm, then rain between 1pm and 4pm, then rain and snow after 4pm. High near 44. Chance of precipitation is 90%. Little or no snow accumulation expected.
Monday Night
Snow, possibly mixed with rain, becoming all snow after 10pm. Mostly cloudy, with a low around 34.
Tuesday
Rain, possibly mixed with snow, becoming all rain after 4pm. Cloudy, with a high near 44.
Tuesday Night
Rain before 10pm, then rain, possibly mixed with snow. Cloudy, with a low around 37.
Wednesday
Rain, possibly mixed with snow. Cloudy, with a high near 45.
Wednesday Night
Rain, possibly mixed with snow. Cloudy, with a low around 40.
Thursday
Rain, possibly mixed with snow. Cloudy, with a high near 47.
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ABOUT THIS FORECAST

 
Point Forecast:
Newcastle WA
 47.53°N 122.14°W (Elev. 873 ft)
1:25 pm PST Mar 6, 2026
1pm PST Mar 6, 2026-6pm PDT Mar 12, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database