| Day | Date | High/Low | Forecast |
| Mon | 6th | 77/63 | Amended high temp…Sunny remainder of day. Clear evening. |
| Tue | 7th | 79/64 | Amended high temp…Sunny day. Clear evening. |
| Wed | 8th | 81/65 | Amended high temp…Sunny day. Clear evening. |
| Thu | 9th | 81/64 | Amended high temp…Sunny day. Clear evening. |
| Fri | 10th | 78/63 | Amended high temp…Mostly sunny day except chance of some early morning low clouds. Some evening high clouds possible. |
Synopsis
Influence from high pressure aloft over the Southwest extends into southern California. The center of the high pressure will move about in the coming two weeks, but its weather influence is expected to remain strong in the Southland. The recent return to seasonable temperatures at UCLA should segue to mostly warmer than normal conditions this week and next (almost entire Southland…some chance at just seasonable temperatures at some beaches on some days though).
I amended the campus high temperature forecast slightly higher as it got a bit warmer than I anticipated this morning. Of course, Mother Nature could pull a fast one on me by inducing a stronger than expected sea breeze (applicable to all areas near the coast). In that case, my preliminary forecast may wind up the better forecast (not that different though). Farther inland areas should almost certainly warm modestly (compared with today) for the next few days.
High pressure is forecast to weaken slightly by the end of the week. The current, shallow marine layer may become more extensive (coastal plains coverage was mostly south of L.A. County today), but daily clearing should be fairly quick. Any cooling cycle at the end of the week should be minor. There should be more widespread clouds over the weekend, but like over the 4th of July weekend, these clouds should be of the mid/high altitude type (“monsoon” moisture). Hence, it may become a bit muggy (L.A. standards…still “dry” for many eastern U.S. residents).
Depending on the actual wind flow pattern, there may or may not be a relevant, “monsoon” moisture incursion into southern California. Some computer model solutions show enough moisture/instability for mountain/desert showers and isolated thunderstorms (valid latter half this weekend or early next week). No relevant shower threat should occur west of the mountains, but the models last week didn’t pick up on a “surprise” disturbance on the 4th (scattered, light showers fell in some areas). All it takes is a small error in predicted wind flow.
Many of the longer range models show renewed strength in the Southwest high pressure sometime next week. So, after a minor drop in temperatures this weekend, there may be moderate warming next week. This scenario is far from certain, but warmer than normal weather of some magnitude appears probable (nothing unusual for July). How significant a possible “monsoon” incursion gets in the Southland remains to be seen (a few scenarios include widespread showers/thunderstorms in the mountain/desert region).
Next issued forecast/synopsis should be on Monday, 13 July.