Valley highs will warm to the mid to upper 90s this afternoon. A weak frontal boundary may help to trigger a few isolated mountain thunderstorms, mainly to the north and northwest.
The cut-off low that was spinning just off to our west yesterday is quickly diving south into central and southern California today. A weak frontal boundary that help to kick the low south may be strong enough to trigger a few mountain thunderstorms today. However, we're not expecting nearly as much thunderstorms today as what we saw yesterday and that is why there are no Red Flag Warnings in place today.
We'll continue to sit in northwesterly flow aloft which will help to keep the Northstate close to or slightly below normal through this week.
Something to keep a close eye on the next 7-10 days is increased activity in eastern Pacific tropics. It is not unheard of in the late summer that remnant moisture from tropical systems can get pulled north close to central and northern California. The remnant moisture is then able to spark thunderstorms and rain. Several models are hinting at leftover moisture from tropical systems may come close to California in the next 10 days. For now it is just something to watch. As always things will change with solutions this far out so we'll just wait and see.