


Area Forecast Discussion
Issued by NWS Los Angeles, CA
Issued by NWS Los Angeles, CA
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331 FXUS66 KLOX 160400 AFDLOX Area Forecast Discussion...UPDATED National Weather Service Los Angeles/Oxnard CA 900 PM PDT Tue Jul 15 2025 .SYNOPSIS...15/740 PM. Night through morning low clouds and patchy fog will continue for the coasts and most valleys through much of this week. A cooling trend will continue through Thursday when valley highs are only expected to be in the 80s. A slow warming trend will develop by the weekend with highs close to normal. && .SHORT TERM (TUE-FRI)...15/859 PM. The latest fog product imagery shows low clouds and fog well entrenched across the coastal waters this evening. Clouds are making a run into coastal and valley areas as strong onshore flow remains in place. The marine layer depth will continue to deepen overnight tonight and push low clouds and fog into the coastal slopes of the mountains. A persistent marine layer depth and an onshore flow will continue through Wednesday and keep a cooler than normal pattern in the forecast. ***From Previous Discussion*** A slow warming trend will begin Thursday and continue through Friday. Marine layer depth will decrease considerably, possibly confined to the coastal zones by Friday. Still monitoring the potential for afternoon showers/storms across the San Gabriel Mountains Thursday as moisture slowly works its way west from MX and AZ. Based on the all the model guidance it still seems like the chances for precip reaching the ground are 10% or less. While PW`s increase to around 1.2", most of that moisture is above 15000 feet and stability parameters are not favorable for sustained updrafts. So will keep rain chances out of the forecast but continue to monitor the models to see if a kicker appears and/or moisture and especially instability increase. .LONG TERM (SAT-TUE)...15/138 PM. Not a lot of weather excitement locally over the weekend and into early next week. The slow warming trend will continue into the weekend, generally topping out near seasonal normals in most areas by Sunday. Then just minimal day to day changes in temps and marine layer coverage early next week with no additional signs of monsoon flow or any big heat waves at least through the middle of next week. && .AVIATION...16/0058Z. Around 2330Z, the marine layer depth was around 1200 feet deep at KLAX. The top of the marine inversion was at 2400 feet with a temperature near 24 degrees Celsius. Moderate confidence in flight categories. High confidence in timing of arrival. IFR to MVFR conditions will spread into coastal and valley terminals through 10Z. There is a moderate chance of LIFR conditions at terminals north of Point Conception between 08Z and 16Z. There is a moderate chance of clearing later than forecast at coastal terminals. KLAX...IFR to MVFR conditions will spread into KLAX as soon as 01Z or as late as 03Z. There is a 30 percent chance that conditions could end up being predominantly MVFR through the period. VFR conditions could develop as soon as 17Z, or as late as 20Z. KBUR...IFR to MVFR conditions will spread into KBUR as soon as 05Z or as late as 08Z. There is a 20 percent chance that conditions could end up being predominantly MVFR through the period. VFR conditions should develop around 17Z. && .MARINE...15/741 PM. Tonight through Thursday, winds and seas are expected to remain below Small Craft Advisory (SCA) levels across all the coastal waters. For Friday through Sunday, winds will begin to increase with a 20-30% chance of SCA level winds around Point Conception. && .LOX WATCHES/WARNINGS/ADVISORIES... CA...NONE. PZ...NONE. && $$ PUBLIC...Hall/MW AVIATION...Hall MARINE...RAT/Ciliberti SYNOPSIS...MW/Ciliberti weather.gov/losangeles Experimental Graphical Hazardous Weather Outlook at: https://www.weather.gov/erh/ghwo?wfo=lox