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

Flood Watch until December 26, 10:00 PM PST

Current conditions at

Hayward, Hayward Air Terminal (KHWD)

Lat: 37.66083°NLon: 122.11833°WElev: 46.0ft.

Mostly Cloudy

53°F

12°C

Humidity	76%
Wind Speed	SSE 8 MPH
Barometer	29.9 in (1012.53 mb)
Dewpoint	46°F (8°C)
Visibility	10.00 mi
Last update	26 Dec 03:54 AM PST

More Information:

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

Extended Forecast for

3 Miles SE Union City CA

Flood Watch December 26, 04:00am until December 26, 10:00pm

Click here for hazard details and duration

Flood Watch

Flood Watch December 26, 04:00am until December 26, 10:00pm
NOW until 10:00pm Fri
Flood Watch
Today
High: 57 °F
Chance
Showers
Tonight
Low: 45 °F
Slight Chance
Showers
Saturday
High: 54 °F
Patchy Fog
then Mostly
Sunny
Saturday Night
Low: 37 °F
Partly Cloudy
Sunday
High: 53 °F
Sunny
Sunday Night
Low: 36 °F
Clear
Monday
High: 55 °F
Sunny
Monday Night
Low: 36 °F
Clear

Detailed Forecast

Today

A 40 percent chance of showers, mainly between 7am and 5pm. Partly sunny, with a high near 57. South wind 11 to 14 mph, with gusts as high as 25 mph. New precipitation amounts between a tenth and quarter of an inch possible.

Tonight

A 20 percent chance of showers between 2am and 3am. Mostly cloudy, with a low around 45. South southwest wind 3 to 7 mph. New precipitation amounts of less than a tenth of an inch possible.

Saturday

Patchy fog before 7am. Otherwise, mostly sunny, with a high near 54. Calm wind becoming north northwest around 6 mph in the morning.

Saturday Night

Partly cloudy, with a low around 37. Light north northeast wind.

Sunday

Sunny, with a high near 53. Calm wind becoming north northeast around 6 mph in the morning.

Sunday Night

Clear, with a low around 36.

Monday

Sunny, with a high near 55.

Monday Night

Clear, with a low around 36.