Monsoonal moisture will bring isolated thunderstorms over higher terrain through Saturday afternoon. Sprinkles or light rain will be possible elsewhere. Above normal temperatures will continue through mid week next week.
Discussion
A push of monsoonal moisture continues making it way across California, though GOES West satellite imagery reveals an end to the plume of moisture is somewhat near as drier air covers the southern half of California tonight. Until then, sprinkles remain possible across the Valley through this afternoon, with a chance for thunderstorms (20 to 35% probability) over higher terrain in the Sierra during the same time period.
By Sunday, most if not all of the moisture plume should have moved out from interior NorCal, leaving Sunday with largely diminished chances and areal coverage for chances of thunderstorms; currently the NBM has a 10-20% probability of thunderstorms south of HWY 50 on Sunday along the Sierra crest. By Monday, thunderstorm chances are more or less non- existent at this point.
Otherwise, the forecast remains largely unchanged, with above normal temperatures expected over the weekend and into early next week. Valley highs will generally be between the high 90s and low 100s, with higher elevations seeing temperatures between the 80s and high 90s, with some locations in the foothills reaching low triple digits as well.
Extended Discussion (Wednesday through Saturday)
The remainder of next week also looks to have temperatures remain above normal as an upper level ridge builds back into the area. The ridging looks to be fairly broad and a bit further west, which should keep any further monsoonal moisture away for the most part. HeatRisk looks to remain moderate on Wednesday with temperatures around the low 100s in the Valley.
Thursday into Friday, the ridging pattern broadens further and peaks slightly further east, allowing heights to lower over interior NorCal and temperatures to come down slightly as well. As such, HeatRisk Thursday and beyond looks to be more and more Minor in coverage, with some remaining areas of Moderate HeatRisk in the foothills and portions of the Valley.