The latest weather forecasts from the National Weather Service in San Diego indicate that Southern California is in for a cooling trend through the weekend, with a more significant chill sweeping through the region early next week. Coastal areas won't see much fluctuation, but inland valleys and desert regions can expect a slight drop in temperatures. According to the National Weather Service San Diego, today's highs will mirror the coast from Wednesday, dipping around 5 degrees cooler for the desert areas.
Looking forward to Friday, not too much will change for those at lower elevations, but folks in the mountains might feel about 5 degrees warmer. High temperatures will range in the lower 70s near the coast, while the Apple and Lucerne Valleys face mid-80s to mid-90s, as stated by NWS San Diego's report. However, the simmering temperatures we've seen won't stick around. A coastal eddy will deepen the marine layer to around 2500 to 3000 feet for the weekend, bringing night and morning coastal low clouds further into the valleys than usual.
The descent into cooler weather continues next week as a stronger low-pressure system will move inland through California around Monday. This transition could plummet temperatures by 20 to 25 degrees below average for mountainous regions. Even the lower deserts may substantially drop, with the cooling peak expected on Monday and Tuesday.
Additionally, the cooling weather brings the chance of light precipitation from the coast to the mountains. According to ensemble output from ECMWF for Big Bear, the strongest winds are anticipated during the day on Monday, promising some respite from the recent high temperatures. As the winds pass through the mountains into the deserts after 22Z, gusts might reach 25-35 knots.
Marine conditions are expected to stay tranquil, with no hazardous situations foreseen through Monday, offering stability among the changing atmospheric conditions above land. Skywarn activation has not been requested for those keeping an eye on the sky. However, weather spotters are still encouraged to report significant developments.
