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

Santa Rosa, Santa Rosa Sonoma County Airport (KSTS)

Lat: 38.5°NLon: 122.81667°WElev: 125.0ft.

Overcast

57°F

14°C

Humidity	93%
Wind Speed	SSE 5 MPH
Barometer	29.83 in (1010.16 mb)
Dewpoint	55°F (13°C)
Visibility	10.00 mi
Last update	10 Apr 07:35 PM PDT

More Information:

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

Extended Forecast for

Saint Helena CA

Tonight
Low: 49 °F
Rain Likely
and Patchy
Fog
Saturday
High: 60 °F
Rain Likely
and Patchy
Fog then
Showers
Saturday Night
Low: 44 °F
Showers
Sunday
High: 58 °F
Showers
Sunday Night
Low: 42 °F
Chance Rain
and Patchy
Fog then
Patchy Fog
Monday
High: 66 °F
Slight Chance
Rain and
Areas Fog
Monday Night
Low: 41 °F
Partly Cloudy
then Patchy
Fog
Tuesday
High: 70 °F
Areas Fog
then Sunny
Tuesday Night
Low: 42 °F
Mostly Clear
then Patchy
Fog

Detailed Forecast

Tonight

Rain likely and possibly a thunderstorm. Patchy fog after 10pm. Otherwise, mostly cloudy, with a low around 49. Calm wind. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Saturday

Rain and thunderstorms likely, then showers and possibly a thunderstorm after 3pm. Patchy fog before 8am. High near 60. Light south southeast wind becoming south 6 to 11 mph in the morning. Winds could gust as high as 25 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

Saturday Night

Showers and possibly a thunderstorm before 8pm, then rain between 8pm and 11pm, then showers and possibly a thunderstorm after 11pm. Low around 44. South wind 5 to 10 mph becoming light in the evening. Winds could gust as high as 23 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.

Sunday

Rain before 11am, then showers and possibly a thunderstorm after 11am. High near 58. Calm wind becoming southwest 5 to 7 mph in the afternoon. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

Sunday Night

A 40 percent chance of rain before 11pm. Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 42. Southwest wind around 6 mph becoming calm in the evening. New precipitation amounts of less than a tenth of an inch possible.

Monday

A 20 percent chance of rain. Areas of fog before 9am. Otherwise, mostly sunny, with a high near 66.

Monday Night

Patchy fog after 2am. Otherwise, mostly clear, with a low around 41.

Tuesday

Areas of fog before 9am. Otherwise, sunny, with a high near 70.

Tuesday Night

Patchy fog after 3am. Otherwise, mostly clear, with a low around 42.

Wednesday

Areas of fog before 8am. Otherwise, mostly sunny, with a high near 72.

Wednesday Night

Partly cloudy, with a low around 43.