Pleasant weather for northern California today as we cooled a few degrees back to a more seasonable level for late May. Don't get used to it, however... weather changes including a lot of heat are coming our way soon. We had a pleasant cooling of a handful of degrees today as a trough of low pressure moved quickly over our region. A few clouds will move overhead tonight, but it will be a pleasant night, and it should be great for viewing the total lunar eclipse. The eclipse is total from 4:11 to 4:26 AM, but will be partial from around 2:45 to around 5:50 AM. Tonight will be mostly clear and mild with lows from the 30s in the mountains to the 50s in the valley. Wednesday will be mostly sunny with highs from the 70s to the lower 90s.
A trough of low pressure will move over Oregon Thursday and Friday. We will miss most of its effects, but we'll have a few clouds, stronger breezes and a minor cooling of our highs. Another weak trough of low pressure may bring a slight chance of mountain showers Saturday, but very little rain will fall. A much stronger ridge of high pressure will then push over California for the remainder of the Memorial Day weekend, and it will bring many of the hottest temperatures we've had since last year. Overnight lows won't cool much due to our warming airmass, staying in the 50s and 60s in the valley through next week. Daytime highs in the valley will be well above average, ranging from the mid and upper 80s to the 90s and lower 100s.