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Area Forecast Discussion
Issued by NWS San Diego, CA
Issued by NWS San Diego, CA
393 FXUS66 KSGX 132034 AFDSGX Area Forecast Discussion National Weather Service San Diego CA 134 PM PDT Tue Aug 13 2024 .SYNOPSIS... Fair and seasonal weather will continue through the weekend. Areas of coastal low clouds will continue nights and mornings, extending into western valleys. Temperatures will remain around normal, followed by a warming trend next week. && .DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE... SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO COUNTIES... Skies are sunny and bright across the region this afternoon. Coastal low clouds and fog have fled, but will eventually have very similar coverage tonight into Wednesday as they did this morning. But coastal low clouds should not be as prevalent or uniform for early Thursday. What you see now is what you get: lots of sunshine. Gusty westerly winds will blow through parts of the mountains and deserts through tonight. Top gusts in the windiest places, the usual spots through passes into adjacent deserts, will exceed 40 mph. A weaker version of these westerly winds will manifest itself late Wednesday. Temperatures will be within a few degrees of normal through the rest of the week, with only minor variations day to day. Very slightly warmer Thursday, slightly cooler Friday and Saturday. A weak trough of low pressure over the Pacific Northwest will continue to press against a stubborn high pressure ridge over Texas for what looks like forever. This weekend, a trickle of monsoonal moisture begins to flow into SoCal. For several days, the moisture is insufficient for thunderstorms through at least the weekend, but eventually there might be enough moisture and instability for storms in the mountains and deserts by Tuesday or Wednesday. Early next week, the ridge imposes itself just a little more to bring a modest warming trend. && .AVIATION... 132000Z...Coast/Valleys...Mostly clear conditions with VFR expected throughout the day. Low clouds with bases 700-900 feet MSL with tops to 1200 feet will develop earlier over KSAN/KCRQ after 03Z and after 07Z around KSNA gradually filling into western valleys overnight. Clouds scatter out Wednesday morning around 15-16Z. Mountains/Deserts...Mostly clear with unrestricted VIS through Wednesday morning. A few Cu based around 12-15kft MSL are possible over the mountain peaks until 02z this evening. && .MARINE... No hazardous marine conditions are expected through Sunday. && .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...MM AVIATION/MARINE...Munyan