October 9, 2018 – Dry and mild weather today. A weak weather system will bring a few light showers to the Sierra Wednesday and Thursday. Temperatures remain near average over the during week.
Discussion
Dry, mild and less breezy conditions are expected today as NorCal remains under northerly flow aloft upstream of the trough over the West. A disturbance dropping south in the the northerly flow will bring a few light showers to the northern Sierra Nevada Wednesday and Thursday, but with little in the way of moisture to work with there will not be much precip. Temperatures will cool back into the mid/upper 70s in the Central Valley as this system passes through.
Extended Discussion (Saturday through Tuesday)
Upper ridge over the eastern Pacific and west coast will keep the forecast area under fair skies and dry conditions through the extended period. An upper low moving on to the southern California coast early next week should be too far south to have any significant impact on NorCal weather. Overall, daytime highs should remain near to a little above normal. Upper level and surface pressure gradients should produce light northerly breezes through the extended period but nothing that looks particularly strong at this time. These north winds will, however, keep daytime humidity values on the low side for this time of year so no end to this summer’s fire season is in sight.