Area Forecast Discussion
Issued by NWS San Diego, CA
Issued by NWS San Diego, CA
908 FXUS66 KSGX 261600 AFDSGX Area Forecast Discussion National Weather Service San Diego CA 900 AM PDT Sun May 26 2024 .SYNOPSIS... Night and morning low clouds expected each day through the forecast period, with the inland extent reaching the western valleys. A few degrees of warming expected for today and tomorrow. For much of the upcoming week, only minor variations in daily high temperatures are expected. && .DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE... SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO COUNTIES... Visible satellite imagery at 9 am was showing low clouds had filled in the coastal basin overnight and were slowly beginning to clear from east to west. Low clouds are expected to clear inland areas by late this morning, with partial clearing along the coast. Low clouds are expected to move back inland tonight, but coverage is not expected to be quite as extensive. For much of the upcoming week, the marine layer is forecast to get shallower due to minor height rises in the mid-levels of the atmosphere. Coverage of low clouds is expected to continue to reach the western valleys, with less chance of coverage reaching into the Inland Empire, and better chances of complete clearing during the day. Today highs will be around 5 to 10 degrees higher than Saturday for inland areas, with the most notable change in the mountains and deserts. Not much change at the coast as the marine layer moderates temperatures. Overall high temperatures will only fluctuate a couple degrees every day this week and remain within 5 degrees above normal: slightly below normal for the coasts and valleys and slightly above normal in the deserts. A short wave ridge is expected over the area by next Saturday which could bring additional minor warming and a continued shallow marine layer. && .AVIATION... 261550Z...Coast/Valleys...Widespread BKN-OVC with bases around 2500 FT MSL and tops to 4000 ft MSL, obscuring higher terrain. Reduced VIS where low clouds and terrain intersect. Inland clearing through 18z. Partial clearing at the coast 18Z-23Z with patchy CIGs continuing at the coast through this afternoon. Low clouds spreading inland again after 00Z Mon, with bases 1500-2000 FT MSL. Clouds could reach 20-25 miles inland by 13Z Mon. Mountains/Deserts...Clear skies through tonight. W-SW winds gusting to 25 knots over/east of mtns after 00z Mon. && .MARINE... West to northwest winds around 20 knots will occur in the outer coastal waters (30-60 NM from the coast) each afternoon and evening through Wednesday. && .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...PG