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

Tracking Late December Winter Storm Expected to Impact the Northern Plains through the Northeast U.S.

A winter storm system will rapidly intensify over the Midwest on Sunday and track through the Great Lakes on Monday. Periods of heavy snow are anticipated across the Upper Great Lakes late Sunday and continuing into Monday. At least 1/10 inch of ice accumulation is expected from a wintry mix across much of the interior Northeast U.S. starting Sunday afternoon. Read More >

Hazardous Weather Conditions

Current conditions at

Arroyo Seco (CI114)

Lat: 36.359°NLon: 121.29°WElev: 235.0ft.

NA

N/A

Humidity 82%
Wind Speed NE 4 MPH
Barometer NA
Dewpoint N/A
Visibility NA
Last update 07 Mar 10:00 AM PST
Extended Forecast for

5 Miles WSW Greenfield CA

Cold Weather Advisory until December 28, 09:00am
Click here for hazard details and duration
Cold Weather Advisory
  •  
    Cold Weather Advisory until December 28, 09:00am

    NOW until 9:00am Sun

    Cold Weather Advisory

  • Overnight

    Low: 36 °F

    Patchy Frost
    and Fog

  • Sunday

    Sunday: Areas of fog before 10am. Patchy frost before 9am. Otherwise, sunny, with a high near 59. Calm wind becoming northeast around 5 mph.

    High: 59 °F

    Patchy Frost
    and Areas Fog
    then Sunny

  • Sunday Night

    Sunday Night: Patchy frost after 3am. Otherwise, mostly clear, with a low around 36. Calm wind.

    Low: 36 °F

    Mostly Clear
    then Patchy
    Frost

  • Monday

    Monday: Areas of frost before 8am. Otherwise, sunny, with a high near 63. East southeast wind 3 to 6 mph.

    High: 63 °F

    Areas Frost
    then Sunny

  • Monday Night

    Monday Night: Clear, with a low around 38. Calm wind becoming east southeast around 5 mph.

    Low: 38 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 67.

    High: 67 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 42.

    Low: 42 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A chance of rain after 10am. Partly sunny, with a high near 66.

    High: 66 °F

    Chance Rain

Detailed Forecast

Overnight
Widespread fog, mainly before 4am. Patchy frost. Otherwise, partly cloudy, with a low around 36. Calm wind.
Sunday
Areas of fog before 10am. Patchy frost before 9am. Otherwise, sunny, with a high near 59. Calm wind becoming northeast around 5 mph.
Sunday Night
Patchy frost after 3am. Otherwise, mostly clear, with a low around 36. Calm wind.
Monday
Areas of frost before 8am. Otherwise, sunny, with a high near 63. East southeast wind 3 to 6 mph.
Monday Night
Clear, with a low around 38. Calm wind becoming east southeast around 5 mph.
Tuesday
Sunny, with a high near 67.
Tuesday Night
Partly cloudy, with a low around 42.
Wednesday
A chance of rain after 10am. Partly sunny, with a high near 66.
Wednesday Night
A chance of rain. Mostly cloudy, with a low around 45.
New Year's Day
Rain likely. Mostly cloudy, with a high near 63.
Thursday Night
Rain likely. Mostly cloudy, with a low around 46.
Friday
A chance of rain. Mostly cloudy, with a high near 61.
Friday Night
A chance of rain. Patchy fog. Otherwise, mostly cloudy, with a low around 44.
Saturday
A chance of rain. Areas of fog. Otherwise, partly sunny, with a high near 62.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles WSW Greenfield CA
 36.28°N 121.32°W (Elev. 600 ft)
Last Update:
12:27 am PST Dec 28, 2025
Forecast Valid:
3am PST Dec 28, 2025-6pm PST Jan 3, 2026
 
Forecast Discussion
 
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