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

Hayward, Hayward Air Terminal (KHWD)

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

Clear

55°F

13°C

Humidity	82%
Wind Speed	SW 4 MPH
Barometer	29.65 in (1004.06 mb)
Dewpoint	50°F (10°C)
Visibility	10.00 mi
Last update	24 Dec 08:00 AM PST

More Information:

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

Extended Forecast for

Union City CA

Flood Watch December 24, 08:24am until December 26, 10:00pm

Wind Advisory December 24, 08:00pm until December 25, 10:00am

Click here for hazard details and duration

Flood Watch

Wind Advisory

Flood Watch December 24, 08:24am until December 26, 10:00pm
NOW until 10:00pm Fri
Flood Watch
Today
High: 61 °F
Chance
Showers then
Severe
Thunderstorms
Tonight
Low: 55 °F
Severe
Thunderstorms
Christmas Day
High: 56 °F
Severe
Thunderstorms
then Showers
Thursday Night
Low: 49 °F
Severe
Thunderstorms
and Breezy
Friday
High: 55 °F
Showers
Friday Night
Low: 43 °F
Showers
Likely and
Patchy Fog
Saturday
High: 54 °F
Slight Chance
Showers and
Areas Fog
then Mostly
Sunny
Saturday Night
Low: 38 °F
Patchy Fog

Detailed Forecast

Today

A chance of showers, then showers likely and possibly a thunderstorm after 4pm. Some of the storms could be severe. Mostly cloudy, with a high near 61. Light south southeast wind becoming south 6 to 11 mph in the afternoon. Winds could gust as high as 21 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Tonight

Showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am, then showers and possibly a thunderstorm after 1am. Some of the storms could be severe. Steady temperature around 55. South southeast wind 16 to 21 mph, with gusts as high as 41 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

Christmas Day

Showers and possibly a thunderstorm. Some of the storms could be severe. High near 56. South wind 15 to 20 mph, with gusts as high as 39 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

Thursday Night

Showers and possibly a thunderstorm. Some of the storms could be severe. Low around 49. Breezy, with a south wind 14 to 22 mph, with gusts as high as 33 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

Friday

Showers, with thunderstorms also possible after 4pm. High near 55. South wind 10 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Friday Night

Showers likely and possibly a thunderstorm before 10pm, then a chance of showers and thunderstorms, mainly between 10pm and 4am. Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 43. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Saturday

A 20 percent chance of showers before 10am. Areas of fog before noon. Otherwise, partly sunny, with a high near 54.

Saturday Night

Patchy fog before 8pm, then patchy fog after 4am. Otherwise, mostly clear, with a low around 38.

Sunday

Sunny, with a high near 54.

Sunday Night

Mostly clear, with a low around 37.

Monday

Sunny, with a high near 56.

Monday Night

Mostly clear, with a low around 39.