Hawaii and Guam Concerns; Record Warmth Spreads Eastward; Heavy Snow for Sierra-Nevada; Severe Weather for the Plains

A very active spring pattern with tropical concerns across the Pacific. Heavy rainfall will continue to impact Hawaii this weekend. Meanwhile we continue to monitor a developing typhoon that may affect Guam into early next week. For the Lower 48, heavy snow for mountains of California this weekend, increase threat for severe thunderstorms next week for the Plains and record warmth spreads east. Read More >

Current conditions at

Renton Municipal Airport (KRNT)

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

Overcast

48°F

9°C

Humidity 93%
Wind Speed NE 3 MPH
Barometer 29.7 in (1005.76 mb)
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Last update 12 Apr 07:20 AM PDT
Extended Forecast for

Newcastle WA

  • Today

    Today: A 10 percent chance of rain after 5pm.  Partly sunny, with a high near 59. Calm wind becoming northwest around 6 mph in the morning.

    High: 59 °F

    Partly Sunny
    then Slight
    Chance Rain

  • Tonight

    Tonight: Rain likely, mainly after 9pm.  Increasing clouds, with a low around 45. West wind 6 to 9 mph becoming south after midnight.  Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 45 °F

    Rain Likely

  • Monday

    Monday: A 50 percent chance of rain.  Cloudy, with a high near 52. South wind around 10 mph.

    High: 52 °F

    Chance Rain

  • Monday Night

    Monday Night: A 50 percent chance of rain.  Mostly cloudy, with a low around 43. Southwest wind around 10 mph.

    Low: 43 °F

    Chance Rain

  • Tuesday

    Tuesday: Rain.  High near 47. South wind 10 to 15 mph, with gusts as high as 26 mph.  Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    High: 47 °F

    Rain

  • Tuesday Night

    Tuesday Night: Rain before 5am, then rain likely, possibly mixed with snow.  Low around 37. Chance of precipitation is 100%. Little or no snow accumulation expected.

    Low: 37 °F

    Rain then
    Rain/Snow
    Likely

  • Wednesday

    Wednesday: A chance of rain and snow showers before 8am, then rain showers. Some thunder is also possible.  High near 48. Chance of precipitation is 80%. Little or no snow accumulation expected.

    High: 48 °F

    Rain/Snow
    then Showers

  • Wednesday Night

    Wednesday Night: A chance of rain before 11pm.  Mostly cloudy, with a low around 35.

    Low: 35 °F

    Chance Rain
    then Mostly
    Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 52.

    High: 52 °F

    Mostly Sunny

Detailed Forecast

Today
A 10 percent chance of rain after 5pm. Partly sunny, with a high near 59. Calm wind becoming northwest around 6 mph in the morning.
Tonight
Rain likely, mainly after 9pm. Increasing clouds, with a low around 45. West wind 6 to 9 mph becoming south after midnight. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Monday
A 50 percent chance of rain. Cloudy, with a high near 52. South wind around 10 mph.
Monday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 43. Southwest wind around 10 mph.
Tuesday
Rain. High near 47. South wind 10 to 15 mph, with gusts as high as 26 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Tuesday Night
Rain before 5am, then rain likely, possibly mixed with snow. Low around 37. 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 48. Chance of precipitation is 80%. Little or no snow accumulation expected.
Wednesday Night
A chance of rain before 11pm. Mostly cloudy, with a low around 35.
Thursday
Mostly sunny, with a high near 52.
Thursday Night
Partly cloudy, with a low around 38.
Friday
Partly sunny, with a high near 53.
Friday Night
Partly cloudy, with a low around 38.
Saturday
Partly sunny, with a high near 59.
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ABOUT THIS FORECAST

 
Point Forecast:
Newcastle WA
 47.53°N 122.14°W (Elev. 873 ft)
11:27 pm PDT Apr 11, 2026
7am PDT Apr 12, 2026-6pm PDT Apr 18, 2026
 
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Additional Resources

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