National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Strong Storm System Brings Heavy Mountain Snow to the Sierra Nevada and Critical Fire Weather Conditions to the Plains

A Pacific storm system will continue to bring low elevation rain and mountain snow to much of the West through Wednesday, with heavy mountain snow expected in the higher elevations of the Sierra Nevada. This system will also bring strong winds to the Intermountain West, Rockies, and Plains, which will create Critical fire weather conditions for the High Plains. Read More >

Current conditions at

Renton Municipal Airport (KRNT)

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

Overcast

61°F

16°C

Humidity 64%
Wind Speed SSW 5 MPH
Barometer 29.82 in (1009.82 mb)
Dewpoint 49°F (9°C)
Visibility 10.00 mi
Last update 21 Apr 04:53 PM PDT
Extended Forecast for

Newcastle WA

  • This Afternoon

    This Afternoon: A 30 percent chance of rain. Mostly cloudy, with a high near 61. Southwest wind around 9 mph.

    High: 61 °F

    Chance Rain

  • Tonight

    Tonight: Rain. Low around 49. Southwest wind 7 to 9 mph becoming south southeast in the evening. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 49 °F

    Rain Likely
    then Rain

  • Wednesday

    Wednesday: Rain, mainly before 10am. High near 54. South southwest wind around 11 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    High: 54 °F

    Rain then
    Chance Rain

  • Wednesday Night

    Wednesday Night: A 30 percent chance of rain before 11pm. Mostly cloudy, with a low around 46. South southwest wind 10 to 13 mph.

    Low: 46 °F

    Chance Rain
    then Mostly
    Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 60. South southwest wind 5 to 8 mph becoming west northwest in the afternoon.

    High: 60 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 42.

    Low: 42 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 64.

    High: 64 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 43.

    Low: 43 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 66.

    High: 66 °F

    Sunny

Detailed Forecast

This Afternoon
A 30 percent chance of rain. Mostly cloudy, with a high near 61. Southwest wind around 9 mph.
Tonight
Rain. Low around 49. Southwest wind 7 to 9 mph becoming south southeast in the evening. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.
Wednesday
Rain, mainly before 10am. High near 54. South southwest wind around 11 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Wednesday Night
A 30 percent chance of rain before 11pm. Mostly cloudy, with a low around 46. South southwest wind 10 to 13 mph.
Thursday
Partly sunny, with a high near 60. South southwest wind 5 to 8 mph becoming west northwest in the afternoon.
Thursday Night
Mostly clear, with a low around 42.
Friday
Sunny, with a high near 64.
Friday Night
Mostly clear, with a low around 43.
Saturday
Sunny, with a high near 66.
Saturday Night
Mostly clear, with a low around 44.
Sunday
Sunny, with a high near 66.
Sunday Night
Partly cloudy, with a low around 46.
Monday
Mostly sunny, with a high near 65.
Monday Night
Partly cloudy, with a low around 45.
Tuesday
Mostly sunny, with a high near 66.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Newcastle WA
 47.52°N 122.17°W (Elev. 400 ft)
Last Update:
2:15 pm PDT Apr 21, 2026
Forecast Valid:
5pm PDT Apr 21, 2026-6pm PDT Apr 28, 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