036 FXUS66 KLOX 051123 AFDLOX Area Forecast Discussion National Weather Service Los Angeles/Oxnard CA 423 AM PDT Thu Jun 5 2025 .SYNOPSIS...04/744 PM. Strong onshore flow and a persistent marine intrusion will continue night through morning low clouds and fog through Saturday. Some thinning of the marine layer depth will take place over the weekend as onshore flow weakens. As a result, low clouds and fog will retreat to the coast and lower valley areas Sunday through Tuesday. Cooler than normal temperatures through the end of the week, then a warming trend will develop for the weekend, especially away from the beaches. && .SHORT TERM (TDY-SAT)...05/256 AM. There will be broad pos tilt troffing aloft along with strong onshore flow at the sfc. The trof has lifted the marine layer to over 3000 ft and marine layer stratus covers all of the csts/vlys and even the cstl slopes. There is enough lift from the trof to create a chance of drizzle esp near the foothills. The onshore push in the afternoon will approach 8 mb and this will bring slow clearing to the inland areas and no clearing at many of the beaches. There is just enough instability and moisture with the trof to bring a slight chc (20 percent) to the eastern San Gabriels and northern VTA mtns. The steering flow is exceedingly weak and any storms that develop will be very slow movers. Max temps will be very similar to ydy about 3 to 6 degrees blo normal. The strong onshore push will bring gusty winds to the Antelope Vly as well as a stronger than normal seabreeze to the beaches. Friday and Saturday will be fairly similar days. Srn CA will be under dry SW flow from a high hgt (578 dam) upper low to the west of SLO county. Hgts will rise a few dam each day and the onshore flow will weaken slightly. Night through morning low clouds will persist but there will be slightly less vly coverage, slightly faster clearing away from the beaches and a few more beaches will see the sun in the afternoon. Max temps will rise a few degrees each day and by Saturday will approach normals. The onshore gradients will generate the usual gusty southwesterly winds across interior sections both Friday and Saturday. However, outside of Lake Palmdale, expect winds to remain below advisory levels. .LONG TERM (SUN-WED)...05/309 AM. The xtnd mdls are coming into better agreement and now it looks likely that some degree of ridging will set up over the area. The EC remains the warmest mdl, but now the GFS has trended warmer. Look for building hgts both Sun and Mon along with a decrease in onshore flow. In fact, there is forecast offshore flow from the north both Monday and Tuesday morning. The night through morning low clouds will continue but there will be less vly intrusion due to the weaker onshore push and the higher hgts which will squish the marine layer down below many vly elevations. Look for two days of warming both Sun and Mon. The coasts will warm the least, but the vlys will reach into upper 80s. Further inland areas like the Antelope Vly will soar up to 100 degrees. Monday`s max temps will be 5 to 10 degrees above normal for the non coastal areas. The bulk of ensembles show hgts falling Tue and Wed along with an increase in onshore flow. Look for more marine clouds and two days of cooling. && .AVIATION...05/0700Z. At 0515Z at KLAX, the marine layer was 2400 feet deep. The top of the inversion was at 5100 feet with a temperature of 18 C. High confidence in VFR TAFs for KPMD and KWJF. Moderate confidence in all remaining TAFs. Flight cat change timing may be off by +/- 90 minutes and cig hgt by +/- 300 ft. KLAX...Moderate confidence TAF. There is a 30 percent chc of OVC008 conds 10Z-14Z. SCT conds could arrive anytime between 19Z and 21Z with a 25% chance of no clearing. No significant east wind component expected. KBUR...Moderate confidence in TAF. Flight cat change timing may be off by +/- 90 minutes. There is a 20 percent chc that cigs will remain AOA 010. && .MARINE...05/422 AM. High confidence in unseasonably quiet conditions through Friday morning with no Small Craft Advisories (SCA) needed. More seasonally typical northwest to west winds will form south of Point Conception during the afternoon to evening hours starting Thursday, possibly reaching SCA levels as early as Friday with short period choppy seas likely nearshore. These winds should be ongoing into the weekend and become more widespread with the strongest gusts focused on the southern outer waters and western portions of the Santa Barbara Channel. Next week will bring increasing chances for both SCA winds and seas. && .LOX WATCHES/WARNINGS/ADVISORIES... CA...NONE. PZ...NONE. && $$ PUBLIC...Rorke AVIATION...Rorke MARINE...Phillips/Black SYNOPSIS...Hall weather.gov/losangeles Experimental Graphical Hazardous Weather Outlook at: https://www.weather.gov/erh/ghwo?wfo=lox