Hawaii and Guam Concerns; Record Warmth Spreads Eastward; Heavy Snow for Sierra-Nevada; Severe Weather for the Plains

A very active spring pattern with tropical concerns across the Pacific. Heavy rainfall will continue to impact Hawaii this weekend. Meanwhile we continue to monitor a developing typhoon that may affect Guam into early next week. For the Lower 48, heavy snow for mountains of California this weekend, increase threat for severe thunderstorms next week for the Plains and record warmth spreads east. Read More >

Current conditions at

Napa, Napa County Airport (KAPC)

Lat: 38.2075°NLon: 122.27944°WElev: 33.0ft.

Rain

54°F

12°C

Humidity	81%
Wind Speed	S 12 MPH
Barometer	29.74 in (1007.11 mb)
Dewpoint	48°F (9°C)
Visibility	9.00 mi
Last update	12 Apr 12:20 AM PDT

More Information:

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

Extended Forecast for

Lake Berryessa CA

Overnight
Low: 45 °F
Showers
Sunday
High: 56 °F
Showers
Sunday Night
Low: 42 °F
Slight Chance
Showers then
Patchy Fog
Monday
High: 63 °F
Areas Fog
then Mostly
Sunny
Monday Night
Low: 43 °F
Mostly Clear
then Patchy
Fog
Tuesday
High: 66 °F
Patchy Fog
then Sunny
Tuesday Night
Low: 43 °F
Mostly Clear
Wednesday
High: 66 °F
Mostly Sunny
Wednesday Night
Low: 46 °F
Partly Cloudy

Detailed Forecast

Overnight

Showers and possibly a thunderstorm. Low around 45. South southeast wind around 8 mph, with gusts as high as 18 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

Sunday

Showers and possibly a thunderstorm, mainly before 4pm, then a chance of showers and thunderstorms after 4pm. High near 56. South wind around 10 mph becoming west southwest in the afternoon. Winds could gust 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.

Sunday Night

A 20 percent chance of showers before 7pm. Patchy fog after 3am. Otherwise, partly cloudy, with a low around 42. West southwest wind 5 to 7 mph becoming calm in the evening.

Monday

Areas of fog before 9am. Otherwise, mostly sunny, with a high near 63. Calm wind.

Monday Night

Patchy fog after 5am. Otherwise, mostly clear, with a low around 43. Light west wind.

Tuesday

Patchy fog before 9am. Otherwise, sunny, with a high near 66.

Tuesday Night

Mostly clear, with a low around 43.

Wednesday

Mostly sunny, with a high near 66.

Wednesday Night

Partly cloudy, with a low around 46.