Southern California residents should brace themselves for an unpredictable weather week, as the National Weather Service San Diego forecasts a closed low-pressure system destined to shepherd in showers and possible thunderstorms across the region. NWS San Diego detailed in a recent synopsis that the system will edge into the southern California coastal waters today, before trekking inland through northern Baja and the southernmost parts of the Golden State come nightfall.
The weather shift signifies a chance of rain and storm activity escalating this afternoon and enduring through tonight, though it's slated to wane late tonight; and yet, the mountains might face a slight chance for showers and thunderstorms on Wednesday, as the inner workings of the atmosphere above southwestern California, was deemed stable on Monday but is bracing for moisture levels to hike to around 200 percent of normal for coastal and valley areas today. Night and morning coastal low clouds will also make their presence known less deeply and less far into the valleys by the weekend.
In terms of beach conditions, surfers and beachgoers are advised to navigate with care due to heightened surf at south to southwest facing beaches, with waves reaching 3 to 5 feet and occasional sets up to 6 feet. More critically, the NWS San Diego issues a Beach Hazards Statement alerting to the chance of thunderstorms that might harness lightning this afternoon and into the night. Residents and visitors to the region should heed these warnings seriously.
As for aviation and marine interests, the forecast warrants attention as "any thunderstorm could produce gusty, erratic winds to 25 knots, lightning, and small hail," which could translate to turbulent flying conditions and unstable seas. NWS San Diego's advisory calls for the general public and marine operators to stay abreast of the variable conditions and be prepared for sudden weather changes.
Lastly, in conjunction with this forecast, a social media post from NWS San Diego notes, "Another closed low pressure area will move through Southern California this week, bringing showers and isolated thunderstorms late Tuesday through late Wednesday," with heightened chances for mountainous terrain, desert locales, and the Inland Empire, rounding out a week where the only thing certain is uncertain weather.
Another closed low pressure area will move through Southern California this week, bringing showers and isolated thunderstorms late Tuesday through late Wednesday. Best chances for the mountains, deserts and the Inland Empire. #cawx pic.twitter.com/3WaDMT95yp
— NWS San Diego (@NWSSanDiego) June 2, 2025
