SoCal Halloween Forecast: Wet Conditions Loom for Trick-or-Treaters

Southern California faces a potentially soggy Halloween, with a significant storm system poised to deliver widespread rainfall and thunderstorms across the region on Saturday evening and into Sunday. This weather event marks the possibility of the first wet Halloween in Los Angeles in years, potentially disrupting traditional trick-or-treating.

The storm is expected to bring scattered showers on Friday, serving as a precursor to heavier downpours that will intensify over the weekend. The National Weather Service forecasts rainfall totals between half an inch and 1.5 inches across the Southland, with some mountain and foothill communities potentially receiving up to 2.5 inches. The most substantial precipitation is anticipated to coincide with peak trick-or-treating hours on Saturday night.

Forecasters describe the system as a challenging one, fueled by a clash between cold northern air and moisture surging from the southwest. This atmospheric collision could also generate isolated thunderstorms, with a 10% to 20% chance of lightning, particularly in the southern parts of the region, from Saturday night into early Sunday.

Temperatures are also expected to drop, with daytime highs ranging from the upper 60s to low 70s under mostly cloudy skies. A brief window of drier weather may occur Saturday morning and early afternoon, with only scattered sprinkles expected. However, conditions are predicted to deteriorate after sunset, with cities like San Bernardino potentially receiving around an inch of rain, while Woodland Hills and Burbank could see about four-tenths of an inch.

While the Halloween night forecast is concerning, the storm is expected to gradually move out of Southern California by Sunday afternoon. A subsequent high-pressure system should bring warmer and drier conditions early next week, allowing residents to dry out costumes and recover from the wet holiday. Another cooling trend is possible towards the end of the following week, though no further significant rainfall is currently projected.

In addition to the Halloween storm, coastal communities in Los Angeles, Orange, and Ventura counties are under a coastal flood advisory through Friday afternoon. Elevated tides and surf of 4 to 5 feet could cause minor flooding, although forecasters anticipate it will be less severe than earlier in the week. High tides are expected to range between 6 and 7 feet on Friday morning.