As we head deeper into summer, the National Weather Service San Diego projects a temperature uptick across Southern California regions, with the San Diego County coast reaching lower to mid-70s and Orange County coastal temperatures mirroring this trend. Inland valleys are set to experience warmer days, moving up to mid-90s, while the Inland Empire could see the mercury hit around 102 degrees, reports the NWS forecast.
The desert areas, already toiling under sweltering conditions, will see high temperatures ranging from 106 to around 112 degrees. Meanwhile, the mountains will offer a slightly more temperate climate with highs ranging from the upper 70s to about 90 degrees at elevations between 4500 to 7000 feet. According to the National Weather Service's Area Forecast Discussion, "There are slight chance of showers and thunderstorms each afternoon in the mountains into early next week."
For those seeking respite near the coastline, the persistent presence of night and morning coastal low clouds and fog may provide temporary relief, enveloping portions of the western valleys during the late night and morning hours. As indicated by the NWS, the likelihood of showers and thunderstorms in the mountainous areas could slightly increase on Thursday afternoon, potentially extending to the deserts during the late hours, then tapering off by Friday.
Over the weekend, the high pressure over the southwest states is poised to reinforce the heat wave, with the possibility of extreme temperatures hitting the deserts. An Excessive Heat Watch has been flagged from Friday to Sunday in the lower deserts, while the Apple and Lucerne Valleys join in alert stakes on Saturday and Sunday. The Area Forecast Discussion also notes, "A Heat Advisory might also be needed for the valleys and for the lower elevations of the mountains for the weekend." Surfers and beachgoers should take heed as a 3ft SSW swell period brings elevated surf and a high risk of rip currents through Thursday evening.
Marine conditions are predicted to remain non-threatening through Sunday, but beach hazards caused by the strong SSW swell persist. The NWS warns that a Beach Hazards Statement remains in effect through Thursday evening for Orange County Coastal Areas-San Diego County Coastal Areas. For individuals seeking outdoor activities or work, staying hydrated and sheltered during peak heat hours is advised to mitigate the risk of heat-related illnesses as the weekend draws near.
