Area Forecast Discussion
Issued by NWS San Diego, CA
Issued by NWS San Diego, CA
501 FXUS66 KSGX 272030 AFDSGX Area Forecast Discussion National Weather Service San Diego CA 130 PM PDT Mon May 27 2024 .SYNOPSIS... Warmer this afternoon than yesterday, especially inland where temperatures will be 5 to 15 degrees higher than yesterday. There will be 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 afternoon, skies are mostly clear except for the coastal areas where the marine layer low clouds are persisting, although the clearing process is ongoing at this hour. This will likely continue for a few more hours before reversing. Temperatures are mostly a few degrees higher than at this time yesterday, however temperatures in the Inland Empire range from 4 to 13 degrees warmer than yesterday. From previous discussion... 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... 271930Z...Coast/Valleys...Low clouds are slowly dissipating over coastal SoCal this afternoon. Bases generally are in the 1500-2000 FT MSL range. Low clouds with slightly lower bases/vis to push back over the coast after 03Z and locally inland overnight into Tuesday. Bases look to generally range between 1000-1500 FT MSL, though a few hours of bases hovering between 700-1000 FT MSL can be expected in spots overnight. 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