The National Weather Service in San Diego is forecasting a change in weather patterns for Southern California, heralding a largely dry and increasingly warm period through Saturday. According to their latest synopsis, inland areas will see a decrease in humidity, with temperatures expected to hover near the seasonal average. The weekend outlook also suggests an uptick in moisture, potentially ushering in precipitation earlier next week.
As the low-pressure system in the northwest interacts with high pressure to the southeast, the region is likely to see a 30 to 40 percent chance of measurable rainfall from showers on Sunday and Monday. "It should be noticeably less humid for inland areas on Saturday," the National Weather Service predicts, providing a brief respite before moisture levels rise again. However, the chance of widespread showers seems to start decreasing come Tuesday and Wednesday, with probabilities dropping to 10 to 30 percent and a slight chance of afternoon thunderstorms thrown into the mix.
For extreme Southwestern California, which covers Orange, San Diego, Western Riverside, and Southwestern San Bernardino counties, the NWS update outlines a 20 percent chance of rainfall this afternoon for mountainous and high desert regions due to isolated showers or thunderstorms. "High temperatures for inland areas will warm, but still be a few degrees below average on Saturday," the NWS update states, signaling a shift away from the excessive heat that Southern Californians often endure. Sunday's temperatures will dip, staying roughly 5 degrees cooler than Saturday's highs.
Looking toward the skies, aviation forecasts suggest that few low clouds at 1200-1800ft MSL will start to increase overnight, with broken ceilings probable up to 20 miles inland generally after 11Z, though expected to clear by 16-17Z. Coastal areas should prepare to see this pattern again after 02Z Saturday, albeit with potentially lower bases and a more constrained inland reach. A notable point for mariners: no hazardous conditions are forecasted through Tuesday morning, marking smooth sailing for those on the water.
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