July 2, 2020 – Dry weather with seasonable temperatures for the next week.
Discussion
Other than a few high clouds, skies are clear across interior NorCal early this morning. The Delta Breeze is a little stronger than yesterday as the marine layer has deepened a bit along the coast in response to slight lowering of heights aloft as the PacNW trough evolves. This has resulted in a little cooling across the northern San Joaquin Valley and southern half of the Sacramento Valley compared to 24 hours ago. Elsewhere, current temperatures are mostly a little milder compared to early Wednesday.
Dry weather with relatively minor fluctuation in temperature is expected through the upcoming Fourth of July holiday weekend over most of interior NorCal. Readings will remain close to seasonal average.
Areas influenced by the Delta Breeze will see a little lower temperatures today and Friday, then a little warmer temperatures are expected over the weekend as the West Coast trough weakens and heights aloft rise again over NorCal as the southwest high builds northward. The Delta Breeze will likely retreat, but not completely disappear, as the marine layer becomes more shallow.
Extended Discussion (Monday through Thursday)
Only subtle changes are likely in the large-scale pattern heading into next week. Ensembles maintain a positively-tilted trough just offshore of the Pacific Northwest while the Four Corners ridge expands toward Arizona. Temperatures will be close to seasonal averages on Monday, followed by a slight cooling trend heading into mid-week. A dry weather pattern will continue.