Residents were dealing with the aftermath Friday morning of a thunderstorm that moved quickly through Southern California as it flooded streets with muddy water and dropped hail and snow in parts of Los Angeles County.
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Rainfall ended in most areas by 7 p.m. Thursday but flooded streets and swollen washes were expected to remain through the overnight hours in the Antelope Valley.
Local news from across Southern California
Officials issued a "yellow alert" for Glendora residents living near hillside areas burned in the Colby Fire, and they were urged to move cars and trash bins from the street in case of flooding and run off from the burn area.
Damaging winds blew at gusts up to 60 mph, and a funnel cloud was spotted in Palmdale (pictured). At least one power pole in Palmdale was struck by lightning.
"Do not drive your vehicle into areas where water covers the roadway," weather officials said. "Most flood deaths occur in automobiles. Flood waters are usually deeper than they appear."
Just 1 foot of flowing water is powerful enough to sweep vehicles off the road, officals said.
"When encountering flooded roads, make the smart choice. Turn around, don't drown," weather officials advised.
Snow blanketed Big Bear and as parts of Riverside saw isolated storms by Thursday afternoon.
“We have been talking about this storm just wobbling around between Nevada and California all week long,” said NBC4 meteorologist Crystal Egger. “We’re still going to be on the backside (of the storm) today, but as that happens we’ll increase our chances of showers and thunderstorms.”
The severe thunderstorm warning expired at 5:15 p.m., according to the National Weather Service.
Temperatures would remain below average with mountain areas expected to drop to the 40s overnight.
Sunshine was expected by midday Friday as the storm moves to the east, Egger said.
Low clouds and fogs were in store during the mornings and evenings this weekend, but overall a warming trend was expected in Southern California.
“We’ll be warming up and drying out for the weekend,” Egger said.
Crystal Egger and Jacob Rascon contributed to this report.