Area Forecast Discussion
Issued by NWS San Diego, CA
Issued by NWS San Diego, CA
214 FXUS66 KSGX 271617 AFDSGX Area Forecast Discussion National Weather Service San Diego CA 917 AM PDT Mon May 27 2024 .SYNOPSIS... Inland areas will be several degrees warmer today than Sunday followed by minor day-to-day changes into early next week. High temperatures will generally be about 5 degrees above average for the deserts and a few degrees below average for the coast and valleys. The marine layer will be around 2500 feet deep, with small day-to-day variations and low clouds extending inland into portions of the valleys during the nights and mornings. There will be gusty southwest to west winds in the mountains and deserts each late afternoon and evening with gusts to around 25 to 35 mph in favored locations. && .DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE... SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO COUNTIES... This morning, the sounding and aircraft reports show the marine layer at about 2500 ft deep - about 1500 ft shallower than yesterday. Satellite imagery shows much of the Inland Empire free of low clouds. Those areas will likely be noticeably warmer than yesterday. The coastal and valley areas covered by low clouds will likely have high temps similar or only slightly warmer than yesterday. Through Wednesday...Extensive high pressure to the south will exert some influence as it competes with the trough extending from an intense low pressure system in the Gulf of Alaska. The result will be minor height rises, a shallower marine layer with less extensive low clouds during the nights and mornings, and generally higher daytime temperatures - mainly inland away from the marine layer influence. High temps today could be as much as 5 to 10 degrees warmer than yesterday for portions of the Inland Empire but only a few degrees warmer near the coast. These high temperatures are a few degrees above average for the deserts and a few degrees below average for the coast and valleys. Not much change is expected, although a low pressure trough moving inland to our north on Wed could bring a slight deepening of the marine layer and minor cooling - mainly west of the mtns. For Thursday through next weekend...Only minor day-to-day changes are expected, with high temperatures generally around 5 degrees above average for the deserts and a few degrees below average for the coast and valleys. The marine layer will be around 2500 feet deep, varying slightly each day, with night and morning low clouds spreading inland into portions of the valleys. There will be gusty southwest to west winds for the mountains and deserts for each late afternoon through late evening with the stronger gusts each day to around 25 to 35 mph. && .AVIATION... 271530Z...Coast/Valleys...Low clouds with bases around 1000-1500 feet MSL and tops to 1900 feet, with pockets of inland vis 2-5SM are lingering over much of the coast and portions of the inland valleys this morning. Scatter out 16-19Z, except only partial or intermittent clearing at immediate coast. Low clouds with similar bases/vis to push back over the coast after 03Z and locally inland overnight into Tuesday. Mountains/Deserts...Local W-SW surface gusts 25-35 knots will occur on the desert mountain slopes and locally into the deserts after 23Z. Otherwise, mostly clear skies today and tonight. && .MARINE... No hazardous marine conditions are expected through Friday. && .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...PG AVIATION/MARINE...Adams