Wednesday was the hottest day of 2022 (so far) for much of northern California. Although the Heat Advisory expires tonight, and it won't be as hot Thursday, we'll have no real relief from the hot weather for some time. Monsoon moisture has been trying to make its way northwestward toward our region, but for most of us we've just had a few clouds over the mountains. Tonight will be mostly clear to clear with lows ranging from the 40s in the mountains to the 60s and 70s in the foothills and valley. Thursday will be mostly sunny and hot, but slightly cooler than Wednesday with isolated rain showers and thunderstorms mainly over the Sierra. Highs will range from the 80s and 90s in the mountains to the 100s in the valley.
Our long-term forecast won't be changing very much, and it will take a while before we have a decent chance of relief from our first real heat wave of the year. There will be just enough lingering monsoon moisture being funneled toward our region that there is a slight chance of rain showers and thunderstorms, mainly over the Sierra Nevada and our far eastern counties. Very few places will receive measurable rain, but thankfully there should not be too many dry lightning strikes, either. The weekend will be quite hot, but we have a chance of cooling down to near-average levels next Monday and Tuesday with a trough of low pressure pushing onshore. Valley lows will be near 70, highs will be in the 90s and 100s.