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By Dennis Romero
Snow reports in Los Angeles sparked a slew of photos on social media with a video of frozen precipitation falling from the sky on Thursday. Some people marked their messages with #snowmageddon.
In most cases, the National Meteorological Service has not been able to confirm the snow actually fell. The precipitation was probably hail or gaupel, said NWS meteorologist Kristen Stewart.
Proclamations on social media, photos and videos have announced the possibility of snow in urban areas such as West Hollywood, Eagle Rock and Pasadena. He fell into the Santa Monica Mountains above Malibu, Stewart said, and reports of snow in nearby communities such as Westlake Village, Thousand Oaks and Calabasas were likely true.
The National Weather Service's Twitter account responded to a video message stating that there was snow at Thousand Oaks: "That's right, it's snow! A lot of confusion today." If the precipitation bounces, it contains ice, and the white balls are melted flakes called graupel.
The NWS says measurable snow has not fallen in downtown Los Angeles since 1949 and that today 's observations should not change that.
Snow has fallen in the usual places, including the San Gabriel and San Bernardino mountains. Snow has fallen in areas with altitudes as low as 1,000 feet in parts of Greater Los Angeles, Stewart said, but rainfall was erratic.
The part of Interstate 5 known as Grapevine, which connects northern Los Angeles County to the agricultural region of Central Valley, was closed for a few hours on Thursday because of the accumulation of One inch of snow on the roadway, said Sgt. Michael Karr of the California Highway Patrol.
A cold front from Canada lowered temperatures and attracted moisture that fell in Las Vegas at night and in parts of southern California on Thursday, Stewart said.
The Clark County School District in Las Vegas said in a statement that school and extracurricular activities had been canceled Friday "due to information on freezing conditions on the roads that could compromise school bus safety during morning trips ".
Thursday, the temperature in downtown Los Angeles was 57 degrees, according to the NWS.
A night freeze warning was issued for Los Angeles County, with temperatures reaching sufficiently low Friday morning – 29 to 32 degrees – to temporarily preserve any possible snow.
San Diego, Riverside and San Bernardino were warned of a winter storm on Thursday night, but the cold front should be in the morning, Stewart said.
Federal forecasters have called for sunny skies over the weekend and above-normal temperatures in southern California next week.
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