Atmospheric River Bringing Heavy Rain to Southern California and Heavy Snow to the Sierra Nevadas

A strong atmospheric river will continue heavy rain over southern California through Friday. The heaviest rainfall is ongoing today in the Los Angeles Basin. Flash and urban flooding is possible. A prolonged heavy snowfall has begun over the Sierra Nevada Mountains and will continue through Friday. Travel will become increasingly difficult over the passes due to snow and strong winds. Read More >

Hazardous Weather Conditions

Current conditions at

Half Moon Bay Airport (KHAF)

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

haze

55°F

13°C

Humidity	82%
Wind Speed	SSW 9 MPH
Barometer	29.88 in (1011.85 mb)
Dewpoint	50°F (10°C)
Visibility	6.00 mi
Last update	26 Dec 12:55 AM PST

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

2 Miles S Montara CA

Flood Watch December 26, 01:01am until December 26, 10:00pm

High Surf Advisory December 26, 04:00am until December 26, 10:00pm

Click here for hazard details and duration

Flood Watch

High Surf Advisory

Flood Watch December 26, 01:01am until December 26, 10:00pm
NOW until 10:00pm Fri
Flood Watch
Overnight
Low: 49 °F
Showers
Likely
Friday
High: 59 °F
Showers
Likely
Friday Night
Low: 46 °F
Chance
Showers
Saturday
High: 57 °F
Slight Chance
Showers
Saturday Night
Low: 41 °F
Mostly Clear
Sunday
High: 57 °F
Sunny
Sunday Night
Low: 41 °F
Mostly Clear
Monday
High: 59 °F
Sunny

Detailed Forecast

Overnight

Showers likely, mainly after 3am. Mostly cloudy, with a low around 49. South southwest wind around 18 mph, with gusts as high as 31 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

Friday

Showers likely, with thunderstorms also possible after 4pm. Mostly cloudy, with a high near 59. South wind 14 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Friday Night

A chance of showers and thunderstorms. Mostly cloudy, with a low around 46. Southwest wind around 9 mph becoming west northwest after midnight. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Saturday

A 20 percent chance of showers. Mostly sunny, with a high near 57. North wind around 10 mph.

Saturday Night

Mostly clear, with a low around 41. North northeast wind 3 to 6 mph.

Sunday

Sunny, with a high near 57.

Sunday Night

Mostly clear, with a low around 41.

Monday

Sunny, with a high near 59.

Monday Night

Mostly clear, with a low around 41.