Area Forecast Discussion
Issued by NWS San Diego, CA
Issued by NWS San Diego, CA
970 FXUS66 KSGX 302043 AFDSGX Area Forecast Discussion National Weather Service San Diego CA 143 PM PDT Thu May 30 2024 .SYNOPSIS... Subtle changes in the weather pattern will occur through this weekend. Warmer weather will continue for inland areas into Friday as high pressure over Mexico expands further north. A trough to the north will move through the region this weekend. We can expect slightly cooler conditions, greater cloud coverage west of the mountains, and stronger west winds for mountains and deserts. A strengthening ridge will build across the West into next week, leading to another slow warming trend. && .DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE... SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO COUNTIES... Inland areas are warming up this afternoon with near 100 degrees being reported across the Coachella Valley and Anza Borrego Desert, with cities of the Inland Empire pushing into the 80s. The marine layer has mixed out pretty well toward the coast with partly to mostly clear conditions for many. Clouds look to form similar to yesterday, fairly quick near the coast and eventually push into western valleys this evening, locally pushing into parts of the Inland Empire by the early morning hours tomorrow. Friday`s weather will be very similar to today`s with morning clouds giving way to mostly sunny conditions for most places away from the beaches. Temperatures will also be very similar to today with a moderate to high chance in seeing highs over 85 degrees mainly along and east of Interstate 215. Like today, highs will be near 105 degrees across the lower deserts. Ensemble model guidance confirms a weak trough pushing into the Pacific Northwest by Saturday, providing some subtle influence on our weather for the weekend. This will bring cooling inland, lowering temperatures up to 5 degrees or so from what we are seeing today per latest NBM guidance. Sunday will be the coolest day overall with highs in the 70s and 80s for western vallyes, mountains, into the high desrt. The marine layer will become slightly deeper, where clouds will fill in most of the coastal basin each evening into the morning hours. West winds will be gusty each afternoon and evening this weekend as well, generally 25-40 MPH. Agreement is fairly in line with a ridge buidling over the West Coast by Monday, pushing inland toward the Great Basin through the week. This will bring gradual warming to our region each day into at least the middle of next week with a shallower marine layer and less wind for mountains and deserts. && .AVIATION... 302030Z...Coast/Valleys...Patchy BKN CIGs will continue near the beaches this afternoon with bases around 1500 ft MSL. Low clouds will spread to around 15 miles inland between 01Z and 06Z Fri and to around 35 miles inland by 12Z Fri with bases 900-1400 ft MSL and tops to 2000 ft MSL. Areas of VIS 2-4 miles, locally below 1 mile, will occur in the valleys 06Z-17Z Fri. Stratus clearing times Fri will be 15Z-18Z in the valleys and 18Z-21Z near the coast with local BKN conditions near the beaches Fri afternoon. Mountains/Deserts...Clear skies with unrestricted VIS will prevail through Fri. && .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...APR AVIATION/MARINE...Maxwell