Area Forecast Discussion
Issued by NWS San Diego, CA
Issued by NWS San Diego, CA
224 FXUS66 KSGX 171009 AFDSGX Area Forecast Discussion National Weather Service San Diego CA 309 AM PDT Tue Sep 17 2024 .SYNOPSIS... Well below average high temperatures will continue through Thursday along with another chance for mostly light showers on Thursday and Thursday night. High pressure will bring dry and much warmer weather for the weekend with inland high temperatures warming to around average on Saturday and 5 to 10 degrees above average for Monday of next week. && .DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE... SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO COUNTIES... .SHORT TERM (Today through Thursday)... A few light island band showers could linger into this morning, mostly for San Diego County. Well-below average high temperatures will continue through Thursday with high temperatures for the mountains and inland valleys as much as 15 to 20 degrees below average. The next low pressure system from the northwest will bring another chance for mostly light showers from the coastal waters to the mountains for Thursday into Thursday night. && .LONG TERM (Friday through Monday)... Inland areas will begin to warm on Friday with high pressure bringing dry and much warmer weather for the weekend into early next week with high temperatures for inland areas warming to around average on Saturday and to 5 to 10 degrees above average on Monday. High temperatures for the inland valleys will warm into the mid 80s to lower 90s on Saturday, and 90s to around 100 Monday. For the lower deserts, high temperatures will warm to around 100 on Saturday, and to 102 to 107 on Monday. && .AVIATION... 170930Z...Coast to mountain ridges...Areas of variable low clouds with bases varying 2500-3500 feet MSL and tops to 6500 feet will continue this morning. Local terrain above 3000 feet MSL will be obscured. Most areas to scatter out after 16Z, starting at the coast and working inland eventually to coastal mountain slopes. Areas of low clouds will redevelop after 02Z, first at coastal mountain slopes and later toward coast. Bases would be around 1800-2800 feet MSL with tops to 3500 feet. Westerly winds will gust 35-45 knots through mountain passes into deserts through 14Z. Local moderate up/downdrafts east of mountain ridges. Otherwise... mostly clear today and tonight. && .MARINE... No hazardous marine conditions are expected through Saturday. && .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...17 AVIATION/MARINE...MM