


Area Forecast Discussion
Issued by NWS Los Angeles, CA
Issued by NWS Los Angeles, CA
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306 FXUS66 KLOX 151006 AFDLOX Area Forecast Discussion National Weather Service Los Angeles/Oxnard CA 306 AM PDT Tue Jul 15 2025 .SYNOPSIS...14/1054 PM. Night through morning low clouds and patchy fog continue for coasts and most valleys through most of this week. A cooling trend will develop and continue through the middle of the week when valley highs are only expected to be in the 80s. && .SHORT TERM (TDY-THU)...14/1154 PM. The streak of benign weather will continue through the short term. The upper high that was over Srn CA Monday with 595 dam hgts will break down today and hgts will fall to 591 dam. The hgts will then further fall to 588 dam by Thursday. The lowering hgts will allow the marine layer depth to rise and there will be a better stratus coverage in the vly. At the sfc, there will be strong onshore flow to both the N and E in the afternoon and moderate onshore flow in the mornings. Night through morning low clouds will continue unabated and as mentioned above with better inland coverage Wed and Thu. The drop in hgts and continue strong onshore flow will bring 2 to 4 degrees of cooling to the vlys and 4 to 8 degrees to the mtns and interior today. The csts will not see much change in max temps. Another 2 to 4 degrees of cooling away from the cst is expected on Wednesday. These max temps are 4 to 8 degrees blo normals and on Wednesday highs across the vlys will only be in the 80s. The upper flow turn to the SE on Thursday and opens the door for some monsoon moisture to move. Current mdls are not too enthusiastic about the amount of moisture that comes into the area and are even less so with the forecast instability and CAPE. All in all a non zero chc for convection, but only 10 percent. Still have to keep an eye on the fcst in case there is a change in the moisture advection fcst. .LONG TERM (FRI-MON)...15/305 AM. The Monsoon threat remains very low with all of the action fcst to occur S and E of LA county. Still worth a 10 percent chc in the afternoon through the weekend. The strong onshore flow regime will finally weaken and will reduce the marine layer coverage. The low clouds will also clear quicker. Beaches that have been mired in clouds will finally start to see a good deal of sunshine. The weaker gradients and slightly higher hgts will bring 1 to 2 degrees of warming both Fri and Sat with little change then fcst for Sun/Mon. Max temps will remain several degrees blo normal for most of the area with only the Antelope Vly coming in with slightly above normal highs. This warming will bring some readings in the lower 90s to the warmer vly locations. && .AVIATION...15/0514Z. At 0505Z at KLAX, the marine layer was 1000 feet deep. The top of the inversion was at 4200 feet with a max temperature of 25 C. For the 00Z TAF package, high confidence in KPMD and KWJF. There is a 20% chance of LIFR conditions at KPRB 12Z-16Z. Moderate confidence in the remainder of the TAFs. Timing of flight category changes could be off by +/- 90 minutes. There is a 30 percent chc of 1 to 3 hours of SCT conds in the afternoon for sites with no clearing fcst. KLAX...Moderate confidence in TAF. Timing of flight category changes could be of by +/- minutes. There is a 30 percent chc of SCT conds 20Z-23Z. No significant easterly wind component is expected. KBUR...Moderate confidence in TAF. Arrival of low clouds may occur any time between 0730Z and 0930Z. SCT-SKC conds could arrive as early as 17Z. && .MARINE...14/818 PM. Overall, tonight through Saturday winds and seas are expected to remain below Small Craft Advisory (SCA) levels across all the coastal waters. From Friday night through Saturday, there is a 20% chance of SCA level winds around Point Conception. && .LOX WATCHES/WARNINGS/ADVISORIES... CA...NONE. PZ...NONE. && $$ PUBLIC...Rorke AVIATION...Rorke MARINE...RAT/CS SYNOPSIS...MW/Sirard weather.gov/losangeles Experimental Graphical Hazardous Weather Outlook at: https://www.weather.gov/erh/ghwo?wfo=lox