10/951 PM.
Expecting continued warm high temperatures, with a cooling trend Friday into the weekend as high pressure weakens. Temperatures should trend warmer again next week. A shallow marine layer will develop for the end of the week and could bring dense fog to the coastal areas.
(Wed-Sat), 10/937 PM.
***UPDATE***
The warming trend continued today with highs flying into the 80s for most of the coasts and coastal valleys. Interior San Luis Obispo County saw some cooler highs, influenced by the persistent valley fog bank to the east. Most of the interior was in the upper 60s to 70s. High pressure begins to weaken Thursday, but still thinking temperatures will be similar to today's values, with about five degrees of cooling near the coasts. High temperatures were warmed Thursday to better align with this thinking, otherwise the forecast looks on track.
***From Previous Discussion***
Another warm day is occurring across southwestern California this afternoon. Daytime high temperatures are well above normal, so far, hovering close to record daily high values. Clear skies remain prevalent across the area as a strong blocking ridge of high pressure aloft continue to drive a warmer and drier weather pattern.
A cooling trend should develop over the coming days as a weak trough will replace the ridge. The ridge axis should move over the region tonight or early Thursday morning and high pressure aloft should start to break down. Temperatures will likely remain above normal through the period as 500 mb heights do not drop enough. A return of onshore flow late this week should bring a return of low clouds and fog. A shallow marine layer depth looks likely to develop across the coast and dense fog could become an issue as we move forward into Friday and Saturday.
(Sun-Wed), 10/109 PM.
Ridging aloft will restablish early next week and likely strengthen through the week. A warming and drying trend will restablish early next week with temperatures likely going well above normal again by the middle of next week. Offshore flow is likely to redevelop again, although not as strongly as it was this week.
10/2331z.
At 2217Z at KLAX, there was no marine layer. There was a surfaced based inversion with a top of 1300 ft and a temperature of 26 C.
High confidence in VFR TAFs.
KLAX, High confidence in TAF. Any east wind component will be less than 7 knots.
KBUR, High confidence in VFR TAF.
10/848 PM.
High confidence in fairly calm conditions and lowering seas through this weekend. SCA level winds are likely to return across the Outer Waters south of Point Conception next week.
Dense fog will likely form across portions of the coastal waters by Thursday night or Friday morning, with highest chances south of Point Conception initially. Fog will likely expand across a majority of the coastal waters and continue through the weekend.
Ca, NONE. PZ, NONE.
