Strong Atmospheric River Bringing Heavy Rain to the Pacific Northwest; Areas of Snow in the North-Central and Eastern U.S.

A strong atmospheric river will bring prolonged heavy rainfall along with gusty winds to the Pacific Northwest through much of this week. The heavy rainfall may lead to widespread urban and river flooding. Accumulating snow is expected over parts of the central Appalachians and Mid-Atlantic today as well as the Upper Midwest and the Upper Great Lakes this evening into Tuesday. Read More >

Current conditions at

Half Moon Bay Airport (KHAF)

Lat: 37.5136°NLon: 122.4996°WElev: 65.0ft.

Clear

64°F

18°C

Humidity 48%
Wind Speed N 0 MPH
Barometer 30.26 in (1024.72 mb)
Dewpoint 44°F (7°C)
Visibility 9.00 mi
Last update 08 Dec 02:35 PM PST
Extended Forecast for

4 Miles E Half Moon Bay CA

  • This Afternoon

    This Afternoon: Sunny, with a high near 58. North northeast wind around 7 mph.

    High: 58 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 47. Northeast wind around 6 mph.

    Low: 47 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 58. North wind around 7 mph.

    High: 58 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 48. North northeast wind around 6 mph.

    Low: 48 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 62. North wind around 7 mph.

    High: 62 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 49.

    Low: 49 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 62.

    High: 62 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 49.

    Low: 49 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 62.

    High: 62 °F

    Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 58. North northeast wind around 7 mph.
Tonight
Mostly clear, with a low around 47. Northeast wind around 6 mph.
Tuesday
Sunny, with a high near 58. North wind around 7 mph.
Tuesday Night
Mostly clear, with a low around 48. North northeast wind around 6 mph.
Wednesday
Sunny, with a high near 62. North wind around 7 mph.
Wednesday Night
Mostly clear, with a low around 49.
Thursday
Sunny, with a high near 62.
Thursday Night
Mostly clear, with a low around 49.
Friday
Sunny, with a high near 62.
Friday Night
Mostly clear, with a low around 47.
Saturday
Sunny, with a high near 60.
Saturday Night
Partly cloudy, with a low around 48.
Sunday
Mostly sunny, with a high near 59.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles E Half Moon Bay CA
 37.46°N 122.36°W (Elev. 1145 ft)
12:26 pm PST Dec 8, 2025
2pm PST Dec 8, 2025-6pm PST Dec 14, 2025
 
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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