July 3, 2020 – Dry weather with seasonable temperatures for the next week.
Discussion
Clear skies cover interior NorCal early this morning. Satellite imagery continues to show extensive stratus along the coast, and profiler data indicate the marine layer depth is around 2k ft which is down a bit from yesterday.
Steady moderate onshore flow continues through the Delta, and its moderating influence has worked its way up the entire Sacramento Valley bringing several degrees of cooling to the northern half of the valley compared to 24 hours ago. Elsewhere, current temperatures are pretty similar to readings observed early Thursday.
Little change is expected today as the persistent onshore flow continues to moderate temperatures, especially across the Central Valley. Long wave troughing along the West Coast will weaken over the holiday weekend into early next week as ridging over the Southwest and SoCal builds northward. This will result in slightly warmer and drier conditions across interior NorCal with weaker Delta flow. Highs will will be a few degrees above average.
Extended Discussion (Tuesday through Friday)
Ensembles support general troughing over the PacNW, with some weak embedded waves moving through early next week. This pattern will result in slightly below normal highs and increased onshore flow.
Little change in high temperatures is expected next week, with low to mid 90s in the Valley. A few Valley locations might hover around the upper 80s. There are some indications that temperatures might warm up late in the period as the Four Corners high expands. A dry weather pattern will continue.