Those in Southern California should brace for a week of fluctuating weather, with high pressure aloft and weak offshore flow expected to bump temperatures up slightly today. The National Weather Service San Diego forecasts gusting northeast winds reaching 40 mph near and below the Cajon Pass through Tuesday morning. Coastal dwellers can expect the usual morning low clouds and fog persisting through Wednesday. NWS San Diego predicts a coastal high ranging from 67 to 75 degrees and up to 81 to 84 degrees in the low desert.
The Area Forecast Discussion from the NWS San Diego states, "High pressure aloft and weak offshore lower-level flow will warm high temperatures today a few degrees from those on Monday." Wednesday will see a mild drop in the heat with weak onshore flow. Come Thursday, however, much of the region will heat up again — with inland valleys possibly hitting a scorching 20 degrees above average.
Looking towards the weekend, the NWS expects a slight cooling trend. But even with this respite, temperatures could remain steeply above seasonal norms, especially in the mountains and far inland valleys. For example, high temperatures on Thursday will decrease from the lower 70s near the coast to mid-80s in the valleys, with the lower deserts basking in lower to mid-80s temperatures.
Maritime conditions, however, appear less eventful. Despite areas of dense morning fog, "no additional hazardous marine conditions are expected through Saturday," according to the NWS Maritime Forecast. Residents and visitors planning coastal activities should be aware of the aforementioned fog. On the weather front, spotters are not requested to activate Skywarn — although any significant meteorological occurrences are encouraged to be reported.
