National Weather Service United States Department of Commerce

Unsettled weather in store for eastern U.S. into weekend

A complex weather system moving across the eastern U.S. will bring a variety of hazardous weather to the region on Friday and into the weekend. Much colder weather is expected by Saturday, along with numerous showers and accumulating snow in the higher elevations of the Appalachians. Rain and snow will move into northern New England on Sunday.
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Current Conditions

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4 Miles S Portola Valley CA

7 Day Forecast

Late
Afternoon

Showers Chance for Measurable Precipitation 80%

Showers

High: 60 °F

Tonight

Showers Chance for Measurable Precipitation 80%

Showers

Low: 45 °F

Saturday

Chance Showers Chance for Measurable Precipitation 50%

Chance
Showers

High: 59 °F

Saturday
Night

Partly Cloudy

Partly
Cloudy

Low: 43 °F

Sunday

Sunny

Sunny

High: 61 °F

Sunday
Night

Mostly Clear

Mostly
Clear

Low: 45 °F

Monday

Mostly Sunny

Mostly
Sunny

High: 63 °F

Monday
Night

Partly Cloudy

Partly
Cloudy

Low: 45 °F

Tuesday

Mostly Sunny

Mostly
Sunny

High: 67 °F

Detailed Forecast

  • Late Afternoon Showers and possibly a thunderstorm. Some of the storms could produce small hail. High near 60. West wind around 6 mph. Chance of precipitation is 80%.
  • Tonight Showers and possibly a thunderstorm before 11pm, then showers likely. Some of the storms could produce small hail. Low around 45. Northwest wind 3 to 6 mph. Chance of precipitation is 80%.
  • Saturday A 50 percent chance of showers. Mostly cloudy, with a high near 59. Light and variable wind becoming west 5 to 10 mph in the afternoon.
  • Saturday Night Partly cloudy, with a low around 43. North northwest wind 3 to 7 mph.
  • Sunday Sunny, with a high near 61. North wind 8 to 11 mph.
  • Sunday Night Mostly clear, with a low around 45.
  • Monday Mostly sunny, with a high near 63.
  • Monday Night Partly cloudy, with a low around 45.
  • Tuesday Mostly sunny, with a high near 67.
  • Tuesday Night Mostly clear, with a low around 49.
  • Wednesday Sunny, with a high near 73.
  • Wednesday Night Mostly clear, with a low around 51.
  • Thursday Sunny, with a high near 70.
  • Thursday Night Mostly clear, with a low around 50.
  • Friday Sunny, with a high near 69.