Area Forecast Discussion
Issued by NWS San Diego, CA
Issued by NWS San Diego, CA
966 FXUS66 KSGX 302024 AFDSGX Area Forecast Discussion National Weather Service San Diego CA 124 PM PDT Wed Jul 30 2025 .SYNOPSIS... Conditions will continue to warm into the weekend, bringing temperatures to near seasonal normals. Temperatures west of the mountains will continue to be near average into early next week, with highs in the low desert up to 5 degrees above average. Low clouds and fog will spread into portions of the western valleys each night. && .DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE... SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO COUNTIES... Minimal changes in high temperatures expected into the weekend, keeping conditions near or slightly above the seasonal average. Chances of the Inland Empire reaching or exceeding 100 degrees is 25 to 50 percent on Saturday, and 40 to 60 percent chance on Sunday. Chances of the low desert reaching or exceeding 110 degrees are 75 to 95 percent over the weekend. The marine layer will fluctuate between 1500 and 2000 feet in depth with areas of night and morning coastal low clouds spreading into portions of the western valleys late each night through the forecast period. A few degrees of cooling is expected for Monday and Tuesday of next week. Some locations west of the mountains will be up to 5 degrees below average early next week. Highs on Tuesday will range from the low to mid 70s near the coast to the upper 80s to mid 90s for the Inland Empire with 105 to 110 for the lower deserts. Wednesday will be a few degrees warmer than Tuesday. && .AVIATION... 302030Z....Coasts/Western Valleys...Low clouds and fog with bases 700-1000 feet MSL, tops to 1600 feet and vis 1-5SM on higher coastal terrain will redevelop and spread ashore after 05Z and locally inland gradually overnight, achieving similar coverage as this morning. Scatter out Thursday around 16-17Z. .Inland Valleys/Mountains/Deserts...Mostly clear with VFR conditions through Thursday. && .MARINE... No hazardous marine conditions are expected through Monday. && .BEACHES... For beaches and harbors...Small water level fluctuations will continue periodically through at least this afternoon from the ongoing but diminishing tsunami. The Tsunami Advisory was cancelled at 520 AM this morning. && .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...CO AVIATION/MARINE/BEACHES...MM