National Weather Service United States Department of Commerce

Heavy rain and mountain snow across the northwestern U.S. this weekend

A Pacific storm system will continue to impact the West Coast through Sunday. Heavy rainfall could lead to flash flooding, river and small stream flooding, as well as mudslides and debris flows, especially over burn scars. At higher elevations, strong winds and heavy snowfall, with accumulations of 1 to 3 feet, could result in hazardous travel through mountain passes.
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Current Conditions

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3 Miles NW Castro Valley CA

7 Day Forecast

Overnight

Slight Chance Rain Chance for Measurable Precipitation 20%

Slight Chc
Rain

Low: 56 °F

Sunday

Slight Chance Rain Chance for Measurable Precipitation 20%

Slight Chc
Rain

High: 61 °F

Sunday
Night

Mostly Cloudy

Mostly
Cloudy

Low: 52 °F

Monday

Mostly Sunny

Mostly
Sunny

High: 63 °F

Monday
Night

Mostly Clear

Mostly
Clear

Low: 50 °F

Tuesday

Sunny

Sunny

High: 63 °F

Tuesday
Night

Partly Cloudy

Partly
Cloudy

Low: 50 °F

Wednesday

Mostly Sunny

Mostly
Sunny

High: 61 °F

Wednesday
Night

Slight Chance Rain

Slight Chc
Rain

Low: 48 °F

Detailed Forecast

  • Overnight A 20 percent chance of rain. Mostly cloudy, with a steady temperature around 56. South wind around 5 mph.
  • Sunday A 20 percent chance of rain before 10am. Mostly cloudy, with a high near 61. Light and variable wind becoming west 5 to 7 mph in the afternoon.
  • Sunday Night Mostly cloudy, with a low around 52. West wind around 6 mph becoming calm in the evening.
  • Monday Mostly sunny, with a high near 63. Calm wind becoming north northwest 5 to 7 mph in the morning.
  • Monday Night Mostly clear, with a low around 50. North wind 3 to 6 mph.
  • Tuesday Sunny, with a high near 63.
  • Tuesday Night Partly cloudy, with a low around 50.
  • Wednesday Mostly sunny, with a high near 61.
  • Wednesday Night A slight chance of rain. Partly cloudy, with a low around 48.
  • Christmas Day Mostly sunny, with a high near 58.
  • Thursday Night Mostly clear, with a low around 43.
  • Friday Sunny, with a high near 57.
  • Friday Night Mostly clear, with a low around 44.
  • Saturday Sunny, with a high near 58.