| Day | Date | High/Low | Forecast |
| Mon | 8th | 81/60 | Amended overnight temperature…Sunny day. Clear evening. |
| Tue | 9th | 83/61 | Amended temperature…Sunny day. Clear evening. |
| Wed | 10th | 84/57 | Amended high temperature…Sunny day. Clear evening. |
| Thu | 11th | 78/56 | Sunny day. Clear evening. |
| Fri | 12th | 75/54 | Mostly sunny day with some high clouds. Some evening high clouds. |
Synopsis
There’s not much to talk about for the weather this week. A large high pressure aloft lies west of the state, and it won’t vary significantly in position for the week (at least, for southern California). The current, weak off-shore flow should continue for a few more days (surface pressure gradient peaking tomorrow though). Marginal on-shore flow should develop by the end of the work week, but the aforementioned high pressure aloft should continue to promote warmer than normal (just cooler than what’s anticipated for the next couple of days).
It ended up warmer than I expected today at UCLA (postcasted 81 degrees for today’s amended forecast…originally forecast 77 for the high today). It’s always a tricky issue for areas near the coast. A weak but relevant ocean breeze can often cut down on warming potential. The surface, off-shore flow strength will peak tomorrow, and temperatures aloft could support several more degrees of warming over today’s readings. However, I amended with only a slight increase fearing an ocean breeze may hinder better warming. FYI– Any ocean breezes through Wednesday should be pseudo-sea breezes. Relative humidity will be remain on the low side.
I show a bit more warming on Wednesday based on a predicted, deep layered, easterly wind flow. Potentially, the campus area could warm into the upper 80s briefly, but if the easterly flow fails to materialize, it should wind up a little cooler than it gets tomorrow. A modest cooling trend is anticipated for Thursday through the weekend from the forecast, marginal on-shore flow. A shallow marine layer may even form by Saturday (dense fog along the coast evening through early morning hours).
All the computer models show high pressure aloft dominant off the state coast next week (just a little weaker than it gets this week). Temperatures may inch upward again starting around Tuesday, but at this point, I’m expecting less of a warm up next week than it gets this week (no widespread 80 degree weather). There is some chance at wet weather over the northwest corner of the state late next week, but chances for more widespread, wet weather in the state aren’t expected before the 22nd. Most of the longer range models continue to back track on any significant changes in the north Pacific jet stream (leading to a storm track squarely through the state). Of course, that prediction for wet weather is far from certain (model solutions actually all over the place for period after the 21st…first day of winter, astronomically speaking).
Next issued forecast/synopsis should be on Monday, 15 December.