Area Forecast Discussion
Issued by NWS San Diego, CA
Issued by NWS San Diego, CA
230 FXUS66 KSGX 300415 AFDSGX Area Forecast Discussion National Weather Service San Diego CA 915 PM PDT Mon Apr 29 2024 .SYNOPSIS... Dry and seasonally warmer weather is forecast this week with night and morning low clouds over the coastal zones and western valleys. Over the weekend, stronger onshore will bring cooler weather and a deeper marine layer. && .DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE... SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO COUNTIES... At 9 PM, skies were clear over land areas, and low stratus were starting to form over the coastal waters. Aided by a weak coastal eddy, these low clouds will increase in coverage tonight and move over the beaches and some of the coastal zones by daybreak. Skies will clear through mid-morning Tuesday with sunny skies in the afternoon. The coastal eddy returns Tuesday night and again Wednesday night with more night and morning low clouds in the coastal zones burning off to sunny afternoons. Coastal highs will be in the 60s and 70s, valley and high desert highs in the 80s, mountain highs in the 60s and 70s, and lower desert highs in the 90s. Over the weekend a Pacific trough deepening down the coast will bring cooler weather, stronger onshore flow, a deeper marine layer, and gusty mountain and desert winds. Some ensemble members show a chance of rain with this trough on Sunday. This scenario will be evaluated in the coming days. && .AVIATION... 300335Z...Coasts/Valleys...FEW low clouds with bases around 1500 ft MSL near the beaches of south San Diego County. Low clouds will move ashore and spread up to 15 miles inland by 14Z. Expect CIG impacts at KSAN, KCRQ and KSNA 08Z-17Z. CIGs will start out around 900 ft MSL then lift by a few hundred feet after 12Z. Areas of VIS 1SM or less where clouds and terrain intersect. Clearing to the coast 16Z- 18Z. Elsewhere, clear skies with unrestricted vis through Tuesday. && .MARINE... No hazardous marine conditions through Friday. && .SGX WATCHES/WARNINGS/ADVISORIES... CA...None. PZ...None. && $$ PUBLIC...Moede AVIATION/MARINE...PG