| Day | Date | High/Low | Forecast |
| Fri | 13th | 63/50 | Postcast…Mostly cloudy remainder of afternoon. Chance of evening low clouds. |
| Sat | 14th | 63/48 | Partly to mostly cloudy day with a slight chance of sprinkles late afternoon. Decreasing clouds in the evening. |
| Sun | 15th | 64/51 | Sunny day. Mostly clear evening. |
| Mon | 16th | 69/53 | Mostly sunny day with scattered high clouds. Some evening high clouds. |
| Tue | 17th | 72/56 | Mostly sunny day with some high clouds possible. Mostly clear evening. |
Synopsis
An upper level trough passed through the state yesterday. Minor rainfall did reach parts of coastal, southern California (mostly west of L.A. County), but relevant rainfall (greater than a quarter inch) stayed north of Point Conception (some decent rain fell in parts of San Luis Obispo County). A couple more storms will pass through the state tomorrow (northern California already feeling its affects) and Monday (tomorrow’s storm the wetter of the two). However, few of the computer models show any measurable rain getting as far south as L.A. County. I wrote in a slight risk for sprinkles in this forecast since it happened yesterday, but I’m almost certain that no measurable rain will occur this far south (cold front travels south but storm dynamics predicted to stay well to the north).
The Monday system should be an “inside slider” type trough for the Southland. Once it passes by, off-shore flow should develop. The model consensus favors a weak Santa Ana wind event (peak mountain gusts under 45 mph), but temperatures with this one should be higher than with the one earlier this week (relatively strong high pressure aloft forecast). There is potential for widespread 80 degree weather away from the coast by the middle of next week (lasting a couple days). Cooler weather should develop by the end of next week, but it should be a gradual cool down.
Many of the longer range models show a new series of storms affecting northern California starting over the subsequent weekend (winter begins on the 21st, astronomically speaking). Most solutions favor minor to modestly wet systems, but they aren’t expected to reach southern California with much punch (similar to other “storms” this month). While it’s not a certainty yet, it’s looking like this December will be a dry one in the Southland (drier than normal, that is).
Next issued forecast/synopsis will be on Monday, 16 December.