I just took a video of my weather radio going off when the warning was issued.
With monsoonal moisture and triple-digit heat today in much of SoCal, nearly non moving storm-cells have been producing heavy rain in the mountains and in the Antelope Valley of LA County as well as throughout the desert areas. A flash flood warning was just issued for portions of the Antelope Valley due a thunderstorm producing heavy rainfall.
The National Weather Service stated that:
" FLASH FLOOD WARNING FOR...PORTIONS OF THE ANTELOPE VALLEY
INCLUDING LITTLE ROCK AND PEARBLOSSOM AND THE ADJACENT NORTHERN
SLOPES OF THE SAN GABRIEL MOUNTAINS... UNTIL 830 PM PDT"
