935 FXUS66 KSGX 121009 AFDSGX Area Forecast Discussion National Weather Service San Diego CA 309 AM PDT Thu Jun 12 2025 .SYNOPSIS... Generally seasonal weather will prevail into next week. Not much change in high temperatures is expected through Friday, then warming for the weekend to around 5 to 10 degrees above average for inland areas on Sunday. Cooling for early next week to around average on Tuesday, then warming to around 5 degrees above average for inland areas on Wednesday. Night and morning coastal low clouds will continue to spread into portions of the valleys. && .DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE... SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO COUNTIES... .SHORT TERM (Today through Saturday)... The marine layer remains around 2000 feet deep. However cloud bases are lower with the depth of the saturated cloud layer a little deeper than 24 hours ago. There could be some patchy drizzle this morning as well as some lower visibilities in fog for the mesas and other higher coastal terrain. Not much change in high temperatures is expected through Friday with high temperatures around average for the coast and valleys and around 5 degrees above average for the deserts. High temperatures through Friday will range from around 70 near the coast to the 80s and lower 90s for the Inland Empire with 104 to 108 for the lower deserts. High pressure to the south will bring warming of a few to around 5 degrees for Saturday. && .LONG TERM (Sunday through Wednesday)... High pressure to the south will continue the warming through Sunday with Sunday high temperatures 5 to 10 degrees above average. High temperatures on Sunday will range from the lower 70s near the coast to the upper 80s to upper 90s for the Inland Empire with 110 to 114 for the lower deserts. Stronger onshore flow and slight weakening of high pressure aloft will spread cooling inland on Monday and Tuesday with Tuesday high temperatures around average to a few degrees below average. High temperatures on Tuesday will range from around 70 near the coast to the 80s to around 90 for the Inland Empire with 104 to 108 for the lower deserts. Then warming on Wednesday to around 5 degrees above average for the mountains, deserts, and inland valleys. A marine layer near 1500 to 2000 feet deep on Sunday may deepen to around 2000 to 2500 feet on Tuesday with night and morning coastal low clouds spreading farther into the valleys. && .AVIATION... 120930Z....Coast/Valleys...Low clouds based around 600-1000 feet MSL with tops to around 2000 feet will continue to fill most of the inland valleys through 14Z. Vis reduced over higher coastal terrain between these levels. Inland areas scatter out 16-17Z, and 18-20Z for coastal areas, with partial if any clearing at the immediate coast. Low clouds will begin to move inland after 01Z and into valleys early Friday, but not as extensively as this morning. Bases/vis will be similar or slightly lower. Otherwise...mostly clear skies and unrestricted vis today and tonight. && .MARINE... No hazardous marine conditions are expected today through Monday. && .SKYWARN... Skywarn activation is not requested. However weather spotters are encouraged to report significant weather conditions. && .SGX WATCHES/WARNINGS/ADVISORIES... CA...None. PZ...None. && $$ PUBLIC...17 AVIATION/MARINE...MM