The summer heat continues for northern California as a ridge of high pressure builds over the Four Corners states. We can expect a mostly clear to clear sky tonight with plenty of moonlight and seasonably mild temperatures. The mountains can expect lows in the 40s and lower 50s, with highs rising into the 80s with a few lower 90s. The foothills and valley will stay quite mild with lows ranging from the upper 50s to the upper 60s. Highs will be a few degrees hotter than today, ranging from the lower 90s to the lower 100s. Breezes will develop in the afternoon as a trough of low pressure passes over the Pacific Northwest, but no Fire Weather Watches or Red Flag Warnings are in effect.
Once that small disturbance leaves our region, we'll have more sunshine, weaker wind and hotter temperatures on Friday and Saturday. A larger trough of low pressure will again move over the Pacific Northwest and northern California late Saturday through next Monday, and we can expect a few more clouds and stronger breezes. At this time, it appears the strongest wind will stay in Oregon and Washington. Another trough will bring more breezes and only slightly cooler air next Tuesday before leaving the region next Wednesday. Highs will stay above average for all areas, ranging from the 80s and lower 90s in the mountains to the 90s and lower 100s in the foothills and in the valley.