After a weekend of unusually high temperatures, a cool change is on its way to Southern California thanks to an approaching low-pressure system, according to a National Weather Service San Diego forecast. Yesterday, inland areas were still experiencing a moderate HeatRisk and scorchers in the low deserts, with temperatures between 102 and 106 degrees. As reported by NWS San Diego, Coastal areas had milder temperatures ranging from 72 to 84 degrees.
However, the heat is about to break, as this low pressure asserts itself more forcefully. "A substantial cooling trend begins today, and especially tomorrow," the National Weather Service in San Diego states. Gusty winds are expected to sweep through the mountains and deserts from Monday to Tuesday, potentially creating blow-dust conditions and necessitating wind advisories in several areas. Temperatures are also set to decline sharply, with inland valleys expected to experience a drop of about 20 to 25 degrees from Sunday's highs.
The cooling also creates a chance for some precipitation. According to the same source, Monday night into Tuesday morning could even see some drizzle or light rain in coastal, inland, and mountain areas. This is as the deep marine layer makes a return, a typical marker of May in California. By Tuesday, the Inland Empire may only reach the low to mid-60s, a notable decrease from the past weekend's high heat.
Mariners should anticipate stronger northwest winds across the outer coastal waters come Monday and Tuesday, with the National Weather Service issuing a Small Craft Advisory for those times. "Northwest winds strengthen for Monday and Tuesday, with sustained winds of 15 to 20 kt and gusts to 25 kt across the outer coastal waters leading to conditions hazardous to small craft," details the advisory. Winds are forecasted to briefly settle down Tuesday morning before ramping up again in the afternoon and evening, suggesting boaters should remain cautious.
