08/644 PM.
A warming trend will continue this week with well above normal temperatures through Friday, peaking Tuesday through Thursday. Offshore flow will produce locally gusty canyon winds in the mornings.
(tdy-Thu), 09/1238 AM.
Very benign and quite pleasant weather is on tap for the next three days. A 591 MB ridge of high pressure centered 700 miles west of Los Angeles, and will remain nearly stationary. Hgts over Srn CA will be near 582 dam through the period. Offshore flow will peak today with the morning gradients forecast to be near 4 mb from the east and almost 7 mb from the north. There is, however, zero upper level support and this will keep most wind gusts under advisory levels. Only the Santa Lucia range in SLO county will have consistent advisory level gusts. Still, there will be gusty winds through and below passes and canyons in the usual Santa Ana wind prone areas.
The offshore flow will weaken both Wed and Thu and while it will eliminate the morning offshore winds it will diminish them.
The upper high will keep any mid and high level clouds from reaching the area and the offshore flow will prevent any marine layer low clouds from forming. As a result skies will be clear through Thursday.
The well advertised warm up will continue as higher than normal hgts (+11 dam), offshore flow and sunny skies all conspire to bring much warmer than normal temperatures to the area. Look for 2 to 3 degrees of warming for most areas both today and Wednesday. This will make Wednesday the warmest day with coastal areas away from the beaches seeing highs in the upper 70s to mid 80s and the vlys solidly in the 80s. These max temps are 12 to 18 locally 22 degrees above normal. Weaker offshore flow will allow an earlier and stronger seabreeze on Thursday and this will cool the csts/vlys by 3 to 6 degrees. The mtns and interior could see 1 or 2 degrees of warming.
(Fri-Mon), 09/243 AM.
The ridge weakens on Friday along with the offshore flow. Hgts fall to 580 dam. The ridge and offshore flow will still be strong enough to keep the clouds away. Max temps will fall 2 to 4 degrees (5 to 6 at some nearshore areas), but will remain well above normal.
Weak troffing will arrive early Saturday and hgts will fall to 578 dam. Weak onshore flow will develop as well and this will likely bring night through morning low clouds and fog (probably dense) back to some of the coasts. Max temps will fall 1 to 2 degrees on Saturday and a more noticeable 3 to 6 degrees on Sunday. Despite the cool down max temps will remain 3 to 6 degrees over normals across the csts/vlys and 6 to 12 degrees further inland.
Ridging and stronger offshore flow are slated to return next Monday which will lead to less low clouds and hier temps.
A look at the day 8 to 15 forecast with the AI long range mdls shows very little chc of rain during the period.
09/1043z.
At 1010Z at KLAX, There was no marine layer. There was a surface- based inversion with a top of 900 feet and a temperature of 25 C.
High confidence in TAFs.
KLAX, High confidence in TAF. Any east wind component will be less than 7 knots.
KBUR, High confidence in VFR TAF.
09/133 AM.
NE winds of 15 to 25 knots will affect wind prone areas at time through Wednesday or Thursday, highest chances through Wednesday morning. This includes portions of the Central Coast and from Ventura to Santa Monica. These winds will likely reach low-end Small Craft Advisory (SCA) levels for the nearshore waters of San Luis Obispo County.
Some dense fog will form in the coastal waters by Thursday, but low confidence on when and where.
Ca, Wind Advisory remains in effect until 10 AM PST this morning for zone 342. (See LAXNPWLOX). PZ, Small Craft Advisory in effect until 10 AM PST Wednesday for zones 645-670-673. (See LAXMWWLOX).
