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

LAS TRAMPAS (LTRC1)

Lat: 37.83389°NLon: 122.06694°WElev: 1760.0ft.

NA

45°F

7°C

Humidity 100%
Wind Speed WSW 15 MPH
Barometer NA
Dewpoint 45°F (7°C)
Visibility NA
Wind Chill38°F (3°C)
Last update 12 Apr 01:28 AM PDT
Extended Forecast for

Walnut Creek CA

  • Overnight

    Overnight: A 50 percent chance of showers and thunderstorms.  Mostly cloudy, with a low around 46. South southwest wind around 10 mph, with gusts as high as 23 mph.  New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 46 °F

    Chance
    Showers

  • Sunday

    Sunday: Showers and possibly a thunderstorm, mainly before 4pm, then a chance of showers and thunderstorms after 4pm.  High near 60. Southwest wind 10 to 13 mph, with gusts as high as 25 mph.  Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    High: 60 °F

    Showers

  • Sunday Night

    Sunday Night: A 40 percent chance of showers, mainly before 8pm.  Patchy fog after 4am.  Otherwise, partly cloudy, with a low around 44. West southwest wind 5 to 8 mph becoming calm  in the evening.

    Low: 44 °F

    Chance
    Showers then
    Patchy Fog

  • Monday

    Monday: Patchy fog before 9am.  Otherwise, mostly sunny, with a high near 65. Calm wind becoming west northwest around 6 mph in the afternoon.

    High: 65 °F

    Patchy Fog
    then Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 44. West southwest wind 3 to 7 mph.

    Low: 44 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 66.

    High: 66 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 44.

    Low: 44 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 68.

    High: 68 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 47.

    Low: 47 °F

    Partly Cloudy

Detailed Forecast

Overnight
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 46. South southwest wind around 10 mph, with gusts as high as 23 mph. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday
Showers and possibly a thunderstorm, mainly before 4pm, then a chance of showers and thunderstorms after 4pm. High near 60. Southwest wind 10 to 13 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Sunday Night
A 40 percent chance of showers, mainly before 8pm. Patchy fog after 4am. Otherwise, partly cloudy, with a low around 44. West southwest wind 5 to 8 mph becoming calm in the evening.
Monday
Patchy fog before 9am. Otherwise, mostly sunny, with a high near 65. Calm wind becoming west northwest around 6 mph in the afternoon.
Monday Night
Mostly clear, with a low around 44. West southwest wind 3 to 7 mph.
Tuesday
Sunny, with a high near 66.
Tuesday Night
Mostly clear, with a low around 44.
Wednesday
Mostly sunny, with a high near 68.
Wednesday Night
Partly cloudy, with a low around 47.
Thursday
Sunny, with a high near 70.
Thursday Night
Clear, with a low around 45.
Friday
Sunny, with a high near 75.
Friday Night
Mostly clear, with a low around 45.
Saturday
Mostly sunny, with a high near 77.
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ABOUT THIS FORECAST

 
Point Forecast:
Walnut Creek CA
 37.9°N 122.07°W (Elev. 203 ft)
1:25 am PDT Apr 12, 2026
2am PDT Apr 12, 2026-6pm PDT Apr 18, 2026
 
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