Powerful Winter Storm from the Upper Midwest into the Northeast; Severe Thunderstorms in the Midwest and Ohio Valley

A rapidly-intensifying storm is expected to bring heavy snow, blizzard conditions, and icing from the Upper Midwest through the Great Lakes and Northeast. Scattered severe thunderstorms may produce severe/damaging wind gusts and a couple of tornadoes across parts of the Midwest and lower Ohio Valley through the evening. Arctic air will expand across the central and southern U.S.. Read More >

Current conditions at

Half Moon Bay Airport (KHAF)

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

Clear

50°F

10°C

Humidity 71%
Wind Speed NA 5 MPH
Barometer 30.26 in (1024.72 mb)
Dewpoint 41°F (5°C)
Visibility 10.00 mi
Wind Chill48°F (9°C)
Last update 29 Dec 01:35 AM PST
Extended Forecast for

Half Moon Bay CA

  • Overnight

    Overnight: Mostly clear, with a low around 41. East northeast wind around 9 mph.

    Low: 41 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 60. Northeast wind 9 to 11 mph, with gusts as high as 21 mph.

    High: 60 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 41. East northeast wind around 7 mph.

    Low: 41 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 60. East northeast wind 8 to 10 mph.

    High: 60 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 10 percent chance of rain after 4am.  Mostly cloudy, with a low around 44. East northeast wind around 7 mph.

    Low: 44 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Wednesday

    Wednesday: Rain likely, mainly after 4pm.  Mostly cloudy, with a high near 58. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 58 °F

    Rain Likely

  • Wednesday Night

    Wednesday Night: Rain likely.  Cloudy, with a low around 46. Chance of precipitation is 70%.

    Low: 46 °F

    Rain Likely

  • New Year's Day

    New Year's Day: Rain likely.  Mostly cloudy, with a high near 58.

    High: 58 °F

    Rain Likely

  • Thursday Night

    Thursday Night: Rain likely.  Cloudy, with a low around 49.

    Low: 49 °F

    Rain Likely

Detailed Forecast

Overnight
Mostly clear, with a low around 41. East northeast wind around 9 mph.
Monday
Sunny, with a high near 60. Northeast wind 9 to 11 mph, with gusts as high as 21 mph.
Monday Night
Mostly clear, with a low around 41. East northeast wind around 7 mph.
Tuesday
Mostly sunny, with a high near 60. East northeast wind 8 to 10 mph.
Tuesday Night
A 10 percent chance of rain after 4am. Mostly cloudy, with a low around 44. East northeast wind around 7 mph.
Wednesday
Rain likely, mainly after 4pm. Mostly cloudy, with a high near 58. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday Night
Rain likely. Cloudy, with a low around 46. Chance of precipitation is 70%.
New Year's Day
Rain likely. Mostly cloudy, with a high near 58.
Thursday Night
Rain likely. Cloudy, with a low around 49.
Friday
Rain likely. Mostly cloudy, with a high near 60.
Friday Night
Rain likely. Mostly cloudy, with a low around 49.
Saturday
Rain likely. Mostly cloudy, with a high near 59.
Saturday Night
Rain likely. Mostly cloudy, with a low around 48.
Sunday
Rain likely. Mostly cloudy, with a high near 59.
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ABOUT THIS FORECAST

 
Point Forecast:
Half Moon Bay CA
 37.48°N 122.42°W (Elev. 397 ft)
12:27 am PST Dec 29, 2025
1am PST Dec 29, 2025-6pm PST Jan 4, 2026
 
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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