Forecasters at the National Weather Service (NWS) Forecast Office in San Diego, CA, predict warmer conditions today, with high temperatures cresting 3 to 7 degrees above the norm. Residents should brace themselves for a temperature spike that could pose a heat risk across most regions. Meanwhile, the mountains hold a sliver of uncertainty, with a 10-15 percent chance of thunderstorms brewing in the high altitudes.
True to their nature, the heat is not planning to take a day off soon. Minuscule changes are expected on Sunday, and by Monday, temperatures are set to rise even further, with the low deserts heating up between a scorching 112-116 degrees and inland valleys witnessing highs of 100-108 degrees. Despite some minor cooling expected from Saturday, according to an Area Forecast Discussion by the NWS, an "Excessive Heat Warning" is issued from 10 AM this morning to 11 PM PDT Tuesday for multiple regions, including Coachella Valley and San Gorgonio Pass near Banning.
Alongside the scorching heat, the forecasted conditions suggest a gradual decline in thunderstorm chances, teetering around 5 to 10 percent, as we approach Sunday and Monday. However, it's not just the heat that's on the rise—so are the stakes. Residents should be mindful as the high temperatures and minimal rain chances are a recipe to heed warnings and follow safety protocols.
If you seek respite near the coast, the marine layer may offer a break, with temperatures in the upper 70s to low 80s. Over the coming days, we are watching for monsoonal moisture slated to arrive by mid-next week, enhancing the likelihood of thunderstorms, primarily in the mountains and deserts. The NWS informs us of "increasing monsoonal moisture" that will return, bringing a 15 to 25 percent chance of thunderstorms from Tuesday, accompanied by "minor cooling."
For sailors and sea lovers, the waters remain tame as the NWS marine outlook suggests no hazardous conditions through Wednesday. Those with their eyes to the skies won't need to be on alert, as Skywarn activation has not been requested.
