Well above average temperatures with generally dry conditions continue. Temperatures lowering late weekend into next week. Isolated mountain thunderstorms possible this afternoon over the Sierra crest.
Discussion
Clear skies continue across interior NorCal overnight with a noticeable temperature difference in Delta influenced areas compared to locations further north. Winds near the Delta have picked up overnight with KSUU reporting winds exceeding 30 mph, with gusts around 40 mph. Lows will consequently vary widely across the area with the northern Sacramento Valley and thermal belts to only cool into the upper 60s to low 70s, while other Valley locations reach into the 50s to low 60s.
Similar weather is expected today as that of yesterday, albeit highs may be a few degrees more in certain locations. Have continued the Excessive Heat Warning through 9 PM for areas in the northern Sacramento Valley and surrounding terrain. Another chance for isolated showers or storms across the Sierra crest is seen later this afternoon, with the best chances seen where storms formed yesterday (over Alpine/Tuolumne Counties).
Ridging makes way for more zonal flow on Friday cooling temperatures down another few degrees, with continued cooling expected through the weekend. Moderate heat risk may still be seen for much of the Valley and foothills during this time, so be sure to continue heat safety precautions. Continued cooling expected early next week.
Extended discussion (Monday through Thursday)
Ensemble guidance develops a trough over the eastern Pacific next week. The result will be significantly cooler temperatures across interior NorCal (back to around average) along with locally breezy conditions.