July 30, 2019 – Temperatures are forecast to be near or slightly below normal this week. Winds will mostly be from the south with an increased Delta Breeze.
Satellite imagery this morning is showing stratus building along the northern coast of California. The question for this morning is whether or not it will penetrate inland to the Sacramento metro area.
Hi-res guidance, especially from the HREF has been suggesting that it will; however, it hasn’t lived fully up to the hype as of yet. It`s still possible but confidence as waning that we’ll see the cloud cover this morning.
In other weather news, the upper level trough remains located over the far eastern Pacific is not expected to budge much through the work week. This will cause temperatures to be much cooler than this past weekend across interior NorCal.
The trough will also allow the Delta Breeze to stay with us for the remainder of the week, keeping Valley overnight temperatures in the upper 50s to 60s. For tomorrow night, the HREF and other hi-res guidance are indicating a possibility of stratus intrusion into the Delta and Sacramento areas due to the strong onshore flow.
Extended Discussion (Saturday through Tuesday)
The weekend will see a slight warm-up as high pressure over the southwest U.S. pushes slowly back west.
Even with the warming, daytime highs Saturday and Sunday are forecast to come in just a little above normal. Subsidence under the ridge and stable mainly southwest flow will keep pops out of the forecast for now.
GFS ensembles indicate continued weak troughing over the eastern Pacific early next week keeping daytime highs Monday and Tuesday relatively unchanged.
Shortwave disturbances pivoting through the upper south to southwest flow could bring some mountain showers but too far out for models to resolve at this time so extended forecast remains QPF free.