Marine Weather and Tide Forecast for Penn Valley, CA

DISCUSSION

Today Through Saturday
The upper level pattern features ridging, with dry and mild weather prevailing across the area today into Saturday. Morning fog potential is also anticipated in the Valley and lower foothills during this timeframe. For tonight into Friday morning, high resolution ensemble guidance indicates a 45 to 80 percent chance of visibilities less than 1/2 mile across portions of the Delta, the central/southern Sacramento Valley and the northern San Joaquin Valley. A Dense Fog Advisory has been issued for the Delta, the central/southern Sacramento Valley, and the northern San Joaquin Valley from midnight tonight through noon PST Friday.
Be sure to slow down and use low-beam headlights if fog is encountered while driving. A gradual warming trend is forecast into Saturday, with Valley highs reaching into the low to mid 60s by Friday. Generally light winds are forecast, except for periodically breezy offshore flow.

Sunday through Early Monday Morning
Ensemble guidance indicates the potential for a weak system to approach the area by the weekend with chances for very light precipitation Sunday into early Monday morning, mainly over the Coast Range and Shasta County mountains. However, latest guidance continues to trend drier. Minor cooling expected on Sunday as well.

Early Next Week
Ridging builds back in, with dry and warmer weather anticipated across interior NorCal along with morning fog potential. The Climate Prediction Center continues to favor drier than normal conditions into early February. Otherwise, breezy offshore flow is expected at times.

AVIATION
Widespread VFR conditions by this afternoon, then around 04z Friday, BR/FG develops across the central/southern Sacramento Valley, northern San Joaquin Valley, and portions of the Delta bringing MVFR/IFR/LIFR conditions until around 20z Friday. Light surface winds below 12 kts expected across the region.

STO WATCHES/WARNINGS/ADVISORIES
Dense Fog Advisory from midnight tonight to noon PST Friday for Carquinez Strait and Delta-Central Sacramento Valley-Northern San Joaquin Valley-Southern Sacramento Valley.