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

UC MERCED WX STATION (UCMC1)

Lat: 37.36611°NLon: 120.4225°WElev: 252.0ft.

58°F

14°C

Humidity	71%
Wind Speed	SSW 0 MPH
Barometer	NA
Dewpoint	49°F (9°C)
Visibility	NA
Last update	24 Dec 11:15 PM PST

More Information:

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

Extended Forecast for

5 Miles NNE Merced CA

Flood Watch December 24, 11:41pm until December 26, 04:00pm

Wind Advisory December 24, 11:41pm until December 25, 04:00pm

Click here for hazard details and duration

Flood Watch

Wind Advisory

Flood Watch December 24, 11:41pm until December 26, 04:00pm
Wind Advisory December 24, 11:41pm until December 25, 04:00pm
NOW: Multiple hazards in effect
Click HERE for Details
Tonight
Low: 53 °F
Showers and
Breezy
Christmas Day
High: 56 °F
Showers and
Breezy
Thursday Night
Low: 49 °F
Showers and
Breezy
Friday
High: 55 °F
Showers
Friday Night
Low: 43 °F
Chance Rain
then Slight
Chance Rain
Saturday
High: 50 °F
Slight Chance
Rain then
Partly Sunny
Saturday Night
Low: 38 °F
Partly Cloudy
Sunday
High: 48 °F
Partly Sunny

Detailed Forecast

Tonight

Showers and possibly a thunderstorm before 1am, then rain after 1am. Low around 53. Breezy, with a southeast wind 20 to 25 mph, with gusts as high as 40 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Christmas Day

Rain before 7am, then showers and possibly a thunderstorm after 7am. High near 56. Breezy, with a south southeast wind around 20 mph, with gusts as high as 35 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

Thursday Night

Showers and possibly a thunderstorm. Low around 49. Breezy, with a southeast wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Friday

Rain before 1pm, then showers and possibly a thunderstorm between 1pm and 4pm, then a chance of rain and thunderstorms after 4pm. High near 55. Southeast wind around 10 mph, with gusts as high as 20 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

A 50 percent chance of rain, mainly before 10pm. Mostly cloudy, with a low around 43. East wind around 5 mph. New precipitation amounts of less than a tenth of an inch possible.

Saturday

A 20 percent chance of rain before 10am. Partly sunny, with a high near 50. Northeast wind around 5 mph becoming northwest in the afternoon.

Saturday Night

Partly cloudy, with a low around 38. Northwest wind around 5 mph.

Sunday

Partly sunny, with a high near 48. Calm wind becoming west northwest around 5 mph.

Sunday Night

Partly cloudy, with a low around 36. Calm wind.

Monday

Mostly sunny, with a high near 47. Calm wind.

Monday Night

Partly cloudy, with a low around 37. Calm wind.