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Forecast Discussion for San Diego, CA
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000 FXUS66 KSGX 311643 AFDSGX Area Forecast Discussion National Weather Service San Diego CA 943 AM PDT Tue Mar 31 2020 .SYNOPSIS... A weak low pressure system well off the northern Baja coast will spread high clouds across southern California today with warm weather for the region. For Wednesday and Thursday, onshore flow will strengthen and spread cooling and cloud cover along the coast and further into the valleys each night. Friday will be a little warmer, then a weak low pressure system moving inland across California on Saturday will generate cooling inland for the weekend. Another stronger storm system from the northwest will bring chances for precipitation by early next week. && .DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE... SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO COUNTIES... .SHORT TERM...(Today through Thursday)... A large area of high pressure in the eastern Pacific will provide another dry day today. Southwesterly flow aloft on the southeastern edge of this system will continue to stream in a thick band of high clouds across the region today. Though these clouds will persist, your Tuesday will be the warmest day of the week with temperatures a touch above normal. A weak coastal eddy will form this evening, which may bring some brief low clouds and fog to the coast later at night. As a storm system enters the Pacific Northwest today, this will lead to a troughing pattern over the West and bring us more cooler and windier weather for the middle of the week. An increase in onshore flow can be expected as surface gradients tighten. This will bring some gusty winds to the mountains and deserts Wednesday afternoon into early Thursday morning. The coastal eddy will strengthen as well, leading to a deeper marine layer. This will bring low clouds to the coast and further into the inland valleys, where patchy drizzle cannot be ruled out. && .LONG TERM...(Friday through Monday)... As we get into the weekend, the weather pattern will slowly become more unsettled. The upper atmosphere will begin to stabilizeon Friday, bringing slightly warmer temperatures and dry weather. Ensembles are in rather good agreement on the timing of the first initial and smaller storm system to slide into Northern California late Friday night into Saturday. But that`s only round one of the "one two punch" as a storm system is expected to gain strength as it pushes south from the Gulf of Alaska. This system will usher in some colder air and chances for precipitation as we head into Sunday evening and potentially lasting through much of Monday as well. && .AVIATION... 311535Z...BKN-OVC200 today and tonight. 09Z-12Z Wednesday...SCT010 near the coast becoming BKN-OVC015 at the coastal airports. && .MARINE... No hazardous marine weather today. A Catalina Eddy spins up tonight and generates south winds from 10-15 kt over the Inner Waters 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...APR AVIATION/MARINE...Moede |
Previous Forecast Discussions may be found at
NWS San Diego, CA (SGX) Office Forecast Discussions.
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