San Diego residents can expect a mild weekend followed by a notable rise in temperatures moving into next week, as reported by the National Weather Service (NWS) San Diego. The NWS forecast released on September 11 reveals that while the weather will remain "just below normal temperatures" for Saturday, residents should prepare for slightly warmer conditions as the new week approaches.
The warming trend, expected to climb toward mid-week steadily, could see temperatures rise to "4 to 8 degrees above average for the coast and valleys," according to the latest Area Forecast Discussion by the NWS San Diego. Notably, Sunday's high temperatures will range from the lower to mid 70s near the coast, to the mid 80s to lower 90s for the Inland Empire, with the mid to upper 90s for the lower deserts. An increasing marine inversion through the weekend should deepen the low coastal clouds, which will be more prevalent from tonight into Saturday morning and spread into the western valleys by Saturday night into Sunday morning.
Beginning next Tuesday, however, the region will see more than just a seasonal temperature shift. From Wednesday through Friday, an anticipated influx of monsoonal moisture could result in afternoon and early evening thunderstorms, particularly for the mountains, deserts, and inland valleys. High temperatures for Wednesday are expected to soar with coastal areas ranging from the mid-70s to lower 80s, and the Inland Empire could hit the mid-90s to 102, with the lower deserts getting up to 100 to 105 degrees. The marine layer is slated to become shallower, and coastal low clouds will likely extend into parts of the western valleys.
As this surge of warmth approaches, the NWS San Diego also indicates that "night and morning coastal low clouds will extend much of the coast and valleys into Saturday morning, then mostly into the far western valleys at times for next week as the marine layer becomes shallower." Residents in higher elevations should brace for potential weather disturbances. The chances for measurable rainfall in Big Bear are forecasted to gradually increase from 10 percent on Wednesday to 33 percent by Friday. Meanwhile, the NWS assures no hazardous marine conditions are expected through Tuesday, providing some respite for mariners and coastal enthusiasts.
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