January 27, 2020 – Precipitation chances continue through Tuesday, mainly for areas north of Sacramento. Otherwise dry conditions expected this week for most areas. Well above average temperatures after mid-week.
Discussion
Satellite imagery indicates partly to mostly cloudy skies north of I-80 with mostly clear conditions to the south. Radar indicated another batch of light precipitation moving inland across northwest California which will move across the far northern portion of the state this morning. Current temperatures are rather mild, ranging from the 30s in the mountains to the mid 40s to mid 50s across the Central Valley.
The considerable cloudiness along with southerly winds of 5-10 mph may preclude much fog development in the Sacramento Valley early this morning. Conditions for fog are more favorable to the south where skies are mostly clear and winds light. May see some patches of fog in the Stockton and Modesto areas around sunrise.
Another system will move into the region late tonight and Tuesday and will weaken as it moves inland. QPF will be very limited (much less than Sunday’s) and little impact is expected.
High pressure will build over the region beginning mid-week and will maintain dry weather through the remainder of the week with above average temperatures. Northerly surface flow may inhibit much fog potential.
Extended Discussion (Friday through Monday)
Strong upper ridging late in the week will bring dry weather with above normal temperatures. High temperatures in the Central Valley projected to be upwards of 10 degrees above normal. Night and morning valley fog will continue to be possible. Upper ridging progresses over the weekend and short wave trough moves through Interior NorCal Sunday. Pacific storm looks fairly weak with some light precipitation possible over the mountains and mainly northern portions of the Sacramento Valley. High amplitude ridging builds inland Monday for drier weather and breezy northerly wind.