An unseasonable shift in weather is bringing the chance of showers and thunderstorms across Southern California, prompting some concerns about flooding as temperatures also drop well below average for mid-September.
In much of the Los Angeles area, the system is expected to bring only light rain or drizzling Thursday and Friday, but there is a possibility for pockets of thunderstorms that could bring heavier rain.
The greatest chance for thunderstorms is in the mountains, including along the Interstate 5 corridor and across the San Gabriels, according to Bryan Lewis, a National Weather Service meteorologist in Oxnard.
“We’re looking at mostly less than a tenth of an inch, maybe up to a quarter of an inch in the mountains,” Lewis said. “It could be higher if a large thunderstorm develops in a certain area.”
He called this weather pattern “somewhat abnormal” for this time of year, given that September is typically one of the drier and warmer months in Southern California.
The expected amount of rain is “definitely above average for what September usually brings,” Lewis said, “and we’re also quite a bit below average for temperatures.”