Area Forecast Discussion
Issued by NWS San Diego, CA
Issued by NWS San Diego, CA
520 FXUS66 KSGX 111617 AFDSGX Area Forecast Discussion National Weather Service San Diego CA 917 AM PDT Tue Jun 11 2024 .SYNOPSIS... Generally seasonal weather will continue for the next week, hot days inland with the marine keeping coastal areas cooler. Night and morning coastal low clouds will spread into portions of the valleys each night, then clear to near the coast each afternoon. A little warmer through Wednesday, slightly cooler for Thursday, warmer for Saturday, then gradual cooling through early next week. && .DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE... SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO COUNTIES... Update... The 12z Miramar sounding showed a stout 13C degree inversion based near 2100 feet. Low clouds extend through the western valleys and portions of the Inland Empire this morning, but are starting to erode across the eastern valleys. With the strength of the inversion, it will be tough to see any sun at the coast today. This will keep the coast and western valleys a few degrees shy of seasonal averages, but slow warming will continue across the mountains and deserts, and highs will run 5-10 degrees above normal in those areas today. Previous Discussion (Issued 232 AM PDT Tue Jun 11 2024)... .SHORT TERM (Today through Thursday)... Generally seasonal weather will continue for at least another week with hot days inland and the marine layer keeping coastal areas cooler. The marine layer will remain around 2000 to 2500 feet deep with night and morning coastal low clouds spreading into portions of the valleys each night, then clearing to near the coast each afternoon. A few degrees cooler for most areas on Thursday as a weak upper level low pressure system moves inland through southern California. && .LONG TERM (Friday through Monday)... Warmer on Saturday with high temperatures a few degrees above average near the coast to 5 to 10 degrees above average for the lower deserts with high temperatures in the lower 70s near the coast and around 112 in the lower deserts. Then gradually cooler through early next week with high temperatures on Monday around average for the deserts and around 5 degrees below average for the valleys. && .AVIATION... 111555Z...Coast/Valleys.... OVC low clouds with bases around 1500 feet MSL with tops to 2500 feet MSL extend inland to KONT. Clearing back toward the coast 16Z-18Z and partial clearing at the coast 18Z- 20Z. After 20Z OVC low cloud bases pushing inland likely to reach KONT by 12Z and KSBD by 13Z. Local VIS restrictions of 1-3SM on higher coastal terrain and inland where clouds and terrain intersect. Bases could go below 1000 ft MSL for a few hours Wed morning. Elsewhere...SCT clouds AOA 25000 ft and unrestricted VIS through Tue. && .MARINE... No hazardous marine conditions are expected through Saturday. && .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...EA AVIATION/MARINE...Small