Today is another warm and dry day across the North State with the Valley reaching the upper-90s to low-80s. Tonight we look to cool off into th mid-to-upper 40s in the Valley. The Ridge will stay warmer in the mid-to-upper 50s and the Sierra could cool off into the 30s.
A ridge of high pressure will will reamin in place through the weekend into next week. This will keep us warm and also keep us dry. Several small disturbance will swing in from the North but will not make it here on the weekend. What we call a Rex Block pattern is blocking the rain from getting in. That means a low pressure system to our south is keeping the high pressure in our area stationary. The high pressure can't mave south due to the other system being there. So when these wetter disturbances try to move in, they can't, since the ridge of high pressure is stuck.
There could be a low pressure system moving in from the West by next Wednesday or Thursday, but this is uncertain. Will still expect some increased clouds Sunday-Monday in the Valley. And slightly cooler temps next week.