Powerful northwest winds will generate rough seas Thursday as the Southland’s first heat wave of 2020 dissipates, only to make way for the second, which is five days away.
A small craft advisory will be in effect until 3 p.m. Thursday, immediately followed by a gale warning scheduled to expire at 3 a.m. Friday.
Northwest winds of 20 to 30 knots with gusts of up to 40 knots and combined seas of 7 to 12 feet are expected when conditions are at their most severe, according to the NWS.
“Mariners should alter plans to avoid these hazardous conditions. Remain in port, seek safe harbor, alter course, and/or secure the vessel for severe conditions,” it said.”Strong winds will create dangerous sea conditions, which could capsize or damage small and large vessels.”
Temperatures, meanwhile, continued to retreat, thanks to a 1,200-foot-deep marine layer.
The NWS forecast partly cloudy skies in L.A. County Thursday and highs of 71 in Avalon; 72 on Mount Wilson; 73 at LAX; 75 in Long Beach; 80 in Downtown L.A. 82 in San Gabriel; 83 in Pasadena and Burbank; 85 in Palmdale and Lancaster; and 86 in Saugus. Highs will generally vacillate between the low and mid-80s until Tuesday, when they will revert to the 90s in several communities in the second Southland heat wave of 2020.
Partly cloudy skies are forecast in Orange CountyThursday, along with highs of 66 in San Clemente; 67 in Laguna Beach; 68 in Newport Beach and on Santiago Peak; 72 on Ortega Highway at 2,600 feet; 74 at Fremont Canyon; 77 and in Fullerton, Irvine, Mission Viejo and at Trabuco Canyon; 78 in Yorba Linda; and 79 in Anaheim. But temperatures will start ramping up slowly Friday and will be in the 90s in several communities Wednesday.