San Diegans can expect another day of mixed temperatures, with coastal areas experiencing a slight uptick by midweek. According to the National Weather Service in San Diego, Wednesday won’t change much from Tuesday for those by the coast. Still, inland temperatures might rise by a few degrees, especially in the mountains and the high desert.
The approaching weekend hints at an atmospheric switch-up, with the region bracing for potential thunderstorms. "An increase in monsoonal moisture will bring a 15 to 25 percent chance for thunderstorms for the mountains and deserts for Thursday afternoon and a 30 to 40 percent chance for Friday afternoon and early evening," explains the Area Forecast Discussion, noting that the chance for these weather events extends into next week.
While coastal areas will endure the usual low clouds in the morning, conditions inland promise to heat up. The inland valleys and the deserts are projected to reach their zenith temperature-wise around Sunday and Monday. Satellite imagery shows low clouds hugging the region's coast, though they are expected to become patchier after Wednesday as monsoonal moisture increases, the National Weather Service reports.
As Thursday rolls in, experts are watching the evolving weather patterns. Notably, "ECMWF ensemble output is showing a greater increase in precipitable water values across the lower deserts into the mountains for Thursday and Friday," a situation fostering increased chances for showers and thunderstorms, mainly for these areas. The impact of the Nixon Fire in Riverside County on air quality and visibility is also shown in satellite imagery, with smoke being tracked and reported by the Area Forecast Discussion.
When the weekend arrives, discussions suggest a possible Heat Advisory for the mountains and inland valleys and even an Excessive Heat Warning for the deserts. The NWS underscores the ongoing "Heat Risk" that may necessitate such warnings through at least Tuesday next week. Meanwhile, maritime interests can breathe easy as "No hazardous marine conditions are expected through Saturday," according to the National Weather Service.
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