According to the National Weather Service in San Diego, those living in inland Southern California are set to experience another wave of intense heat. Forecasters have issued an Excessive Heat Warning through 8 PM Monday, covering regions including the Low Deserts, Inland Empire, San Diego Valleys, and Santa Ana Mountains. During this period, a Heat Advisory will also be in effect for the mountainous areas within San Diego, Riverside, and San Bernardino counties.
The weekend is expected to be particularly sweltering, with temperatures projected to soar 10 to 20 degrees above average for inland areas and coastal zones seeing an increase of approximately 5 degrees above the norm. The weather service forecasts indicate possible record highs, with inland valleys hitting the upper 90s to 103, lower deserts between 106 and 112, and mountain regions from 4500 to 7000 feet elevation warming up to the 90s. Coastal areas will be more temperate, ranging in the high 70s.
The searing conditions come as a high-pressure ridge remains stubbornly parked over SoCal, with Sunday likely the hottest stint day. The marine layer, albeit deeper in recent days, will be more confined to coastal areas, offering some mild relief from the heat with increased cloudiness and potential fog. However, the persistent marine inversion due to the high-pressure system will mean that clouds and fog may linger along the immediate coast into the afternoons, as indicated by the Area Forecast Discussion from the National Weather Service.
Beginning Tuesday, a reprieve from the blistering heat is anticipated, with a gradual cooling trend throughout the rest of the week as the high-pressure ridge weakens. Inland temperatures will slide down to near or a little above seasonal averages by next weekend. However, despite the expected drop in mercury levels, the exact details of the forecast become uncertain beyond Wednesday, as model solutions show varying outcomes for the region.
Safety remains a paramount concern, and the National Weather Service Forcast Office has not activated its Skywarn network, but they encourage weather spotters to report significant weather conditions. Meanwhile, marine conditions should remain largely undisturbed, barring localized fog that may reduce visibility in the early mornings along the coast. As citizens brace for the heat, staying informed on the latest weather updates and taking proper precautions is crucial for ensuring safety and health during this torrid spell.
