Area Forecast Discussion
Issued by NWS San Diego, CA
Issued by NWS San Diego, CA
367 FXUS66 KSGX 090350 AFDSGX Area Forecast Discussion National Weather Service San Diego CA 850 PM PDT Wed May 8 2024 .SYNOPSIS... A Catalina Eddy spinning over the coastal waters this week will bring low clouds each night and morning that will clear back to the coast each afternoon. Seasonal temperatures are forecast west of the mountains through Sunday, but the mountains and deserts will see a few degrees of warming this weekend. && .DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE... SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO COUNTIES... .Evening Update... Low clouds are beginning to fill into parts of the San Diego County coast and valleys this evening. Low clouds will fill into most areas west of the mountains tonight with some more scattered conditions by the morning hours across northern portions of the Inland Empire. Very little day to day changes can be expected over the next couple of days. The marine layer will shrink some by the weekend, with warming for the deserts. There is a low to moderate (30-50%) chance of highs reaching 100 degrees or more by Sunday and Monday of next week across the lower deserts. Otherwise, no forecast changes this evening. .Previous Discussion (200 PM Thursday)... Skies cleared back to the coastal waters this morning, but low clouds were already reforming near Pt Loma this afternoon. They will increase in coverage this evening and move inland tonight as the Catalina Eddy reforms. This eddy will persist through Friday morning with lows clouds each night retreating back to the coast each afternoon. Clearing may be limited at the coast. Highs through Sunday will be close to the seasonal norms in the coastal and valley areas. Over the weekend the mountains and deserts will see a few degrees of warming. The outlook for early next week shows little overall change in the weather as a weak Pacific trough moves inland across SoCal Monday through Wednesday. && .AVIATION... 090345Z...Coast/Valleys...Areas of BKN/OVC low clouds mainly in San Diego County will continue to expand overnight through Orange County and west and south parts of the Inland Empire with bases 1600-2100 ft MSL and tops to 2500 ft MSL. There is a 70% chance of a CIG at KONT, though only for a few hours around 13Z-16Z Thu, while there is a near 100% chance of a CIG at all coastal airports. Local VIS 2-4 miles will occur in BR in the valleys, and higher terrain will be locally obscured 08Z-16Z Thu. Most valleys should clear 16Z-18Z Thu, with coastal areas clearing 18Z-20Z Thu with local BKN conditions continuing Thu afternoon near the beaches. Stratus will spread inland again Thu evening. Mountains/Deserts...Mostly clear skies with unrestricted VIS will continue through Thu evening. && .MARINE... No hazardous marine conditions are expected 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...APR/Moede AVIATION/MARINE...Maxwell