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Area Forecast Discussion
Issued by NWS San Diego, CA
Issued by NWS San Diego, CA
157 FXUS66 KSGX 162040 AFDSGX Area Forecast Discussion National Weather Service San Diego CA 140 PM PDT Fri Aug 16 2024 .SYNOPSIS... Dry and seasonal conditions expected for the weekend. The weather pattern will begin to support an influx of monsoonal moisture by early next week, with the best chance of thunderstorms Wednesday and lesser chances Tuesday and Thursday. A warming trend is expected Sunday through Tuesday. Night and morning low clouds and fog are expected to continue to reach into portions of the western valleys through early next week. && .DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE... SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO COUNTIES... Low clouds have mostly cleared from the coast at 1 PM this afternoon, with areas of high clouds moving south to north across the area. Temperatures at 1 PM today, were running a few degrees cooler than 1 PM yesterday for the coast and valleys; up to 5 degrees warmer for the mountains and High Desert; and a few degrees cooler to the same in the low deserts. Temperatures are expected to cool a few additional degrees into Saturday for most locations. Night and morning low clouds and fog are expected to continue each day through early next week. An influx of monsoonal moisture mid- week may hinder low cloud development. Dry conditions are expected to continue through Monday. Shower and thunderstorm chances are will to begin to increase on Tuesday. The best chance of showers and thunderstorms next week continues to look like Wednesday, but chances of thunderstorms are elevated Tuesday and Thursday. Thunderstorms are expected to remain confined to the mountains Tuesday and Thursday, with the potential for showers or thunderstorms to move into portions of the deserts Wednesday afternoon. Current trend is for dry conditions to return Friday into the weekend. Temperatures will begin to warm again starting Sunday. Temperatures will peak on Tuesday, with moderate to areas of major heat risk in the Inland Empire. Overall, temperatures will be 3 to 7, locally up to 10 degrees above normal for Tuesday. The increase in moisture for Wednesday and potentially Thursday will help decrease high temperatures but conditions will feel muggy. && .AVIATION... 162000Z...Coast/Valleys...Redevelopment of patchy low clouds occurs slightly earlier tonight, with CIGs at coastal sites as early as 04- 06z. Bases similar to this morning, around 600-1100ft MSL, with tops to 1300-1500ft MSL. Similar VIS reductions as well, with valleys and higher coastal terrain as low as 1-3SM, briefly less than 1SM possible, and other coastal sites as low as 4-6SM. Clearing should occur by 17z on Saturday. Mountains/Deserts...FEW-SCT Cu near the mountains with bases to 12,000ft MSL through 01z. A few high clouds with bases 25,000ft MSL through the evening as well. Unrestricted VIS expected through Saturday afternoon. && .MARINE... No hazardous marine conditions are expected through Tuesday. && .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...Zuber