| Day | Date | High/Low | Forecast |
| Mon | 3rd | 79/66 | Sunny remainder of day. Mostly clear evening. |
| Tue | 4th | 79/66 | Mostly sunny day except chance of some early morning low clouds. Mostly clear evening. |
| Wed | 5th | 79/66 | Mostly sunny day with some high clouds. Some evening high clouds. |
| Thu | 6th | 79/67 | Mostly sunny day with scattered high clouds. Scattered evening high clouds. |
| Fri | 7th | 80/67 | Mostly sunny day with scattered high clouds. Scattered evening high clouds. |
Synopsis
A new month has started, but the weather pattern affecting southern California has differed little from July (much of the West, for that matter) . High pressure aloft continues its summer dominance over the Southwest. It weakens occasionally and its center drifts mostly about the Four Corners states. Today is generally cooler (slightly) in most areas, but it remains warmer than normal. For most areas west of the mountains, it also continues to be muggier than usual (for southern California). None of the computer models are predicting major weather changes this week.
At least at UCLA, my predictions for warming/cooling cycles have infrequently been off in timing. It’s been no cooler than the upper 70s( 78 degrees) and no warmer than the mid-80s (84). For today’s forecast, I show virtually no trend, but subtle shifts in the low level winds may induce several degrees change this week. Whether it starts tomorrow or the end of the work week, I can’t say with any confidence (subtle shifts wreaking havoc with my forecasts). Interior sections outside of the influence from the shallow marine layer should warm up again in the second half of the week (how much may depend on a potential, “monsoon” moisture incursion).
As I’ve stated in pass synopses, the warmer than normal ocean locally has made for a muggy mid-summer west of the mountains. “Monsoon” moisture incursions have thus far been mostly minor, but they occasionally add to the humidity. If today’s model consensus is right, there may be some input of “monsoon” air aloft down to the ground (mostly for interior sections). At present, the models aren’t inclined toward forecasting thunderstorms in the mountain/desert region, but that may change (a few show minor chances by the weekend and lasting till early next week).
It’s far from certain, but some models show an upper level trough forming along the West Coast next week (not just Pacific Northwest). That would lead to noticeably cooler weather for well inland areas (less so for areas near the coast). Air from the open Pacific may even reduce the muggy factor for a time. There are other models showing “monsoon” incursions into the Southland mountain/desert region. So, the weather trend for next week is far from certain (for now). We may just end up with more minor warming/cooling cycles.
Next issued forecast/synopsis should be on Monday, 10 August.