Residents of the southwest are experiencing a persistent heatwave, with the National Weather Service (NWS) in San Diego forecasting temperatures 5 to 15 degrees above normal. According to information from NWS San Diego, CA, the searing heat continues, with coastlines expected to feel slightly cooler breezes while the inland areas sizzle. Health officials advise the public to stay hydrated and avoid strenuous outdoor activities.
Furthermore, the NWS San Diego notes an active monsoonal weather pattern that may spawn scattered thunderstorms in the mountains, deserts, and western valleys today. Potential risks from these storms include gusty winds, heavy downpours, and frequent lightning. With wildfires burning in the area, haze and smoke are expected to reduce air quality across the region over the next several days. As if the earth was seeking respite, a trough slated to set up by mid-week promises cooler temperatures and gusty west winds.
The temperatures on Monday are predicted to relent somewhat along the coast due to an increased onshore flow. Meanwhile, inland areas will likely revisit Sunday's climatic conditions, including the humidity. According to a detailed report by the Area Forecast Discussion, "The peak of the heat will be felt near the coast today with highs in the upper 80s and low 90s at the beaches to quickly going above the century mark in adjacent valleys."
Tuesday is expected to signal the beginning of a cooling trend as the high-pressure system starts to weaken, bringing much-anticipated relief. However, with the trough's approach, the most active storm developments could be seen today, especially across mountain areas where storm intensity could lead to moderate risks of localized flash flooding. These storms may carry robust winds, and the public is advised to be vigilant when near storm-hit areas. Sparing the severe heat's brace, cooler temperatures are on the horizon, teasing with forecasts of up to 10 degrees below normal by mid-week.
Marine conditions, however, seem to be faring better, with no significant hazards anticipated through Thursday. At the same time, the weather may influence air traffic, as visibility could be reduced near wildfire areas and stormy regions. The NWS has encouraged weather spotters to report significant conditions, though no formal Skywarn activation has been requested.
Advisories are in place, with a Heat Advisory until 8 PM PDT Monday for Orange County and San Diego coastal areas and an Excessive Heat Warning for several inland valleys and mountain foothills.
