Another round of high heat, elevated humidity and monsoonal moisture moved into the Southland Wednesday, bringing with it thunderstorms that raised fears of flooding in the northern reaches of the county.
By mid-afternoon, a band of thunderstorms moved slowly across a portion of the Antelope Valley, prompting the National Weather Service to issue a flash flood warning for Palmdale, Lancaster, Lake Los Angeles, Pearblossom and Littlerock.
Some flooding was reported on 170th Street East in the Lake Los Angeles area, as well as along Palmdale Boulevard at 165th Street.
The flash flood warning will remain in effect until 6:15 p.m.
While the last band of stormy weather was the result of a tropical storm in the Pacific, the latest round of unstable weather came out of Texas, where an upper-level high-pressure system moved its way westward into Southern California, bringing with it the threat of dry lightning and thunderstorms.
“With dry air at lower levels today, dry lightning will be possible with any thunderstorm activity, the best chances of thunderstorms being over the eastern San Gabriel Mountains,” according to the National Weather Service.
“By tonight, deep moisture will end the threat of dry lightning but bring the potential for flash flooding,” forecasters said. “The best chance of thunderstorms will be on Thursday.”
The hot and humid weather is expected to linger into early next week.
According to the NWS, high temperatures in many areas will be in the 90s to lower-100s Wednesday, although the beaches will likely be in the mid to upper 70s.
Forecasters said that while the thunderstorm threat will initially be in the mountains and the Antelope Valley, there will be a slight chance of storms across the entire area by late tonight, continuing through Thursday.
—City News Service