WHITE OUT BLIZZARD CONDITIONS DRIVERS
Drivers in four-wheel drive vehicles can drive on the roads as long as they have chains in the vehicle. Grieshaber said some motorists were stuck in the snow while others were stopping because they were uncomfortable trying to drive in the snowy conditions.Ĭhains are recommended on state Route 78 at Santa Ysabel east of Ramona and are required for drivers heading up Sunrise Highway from I-8, starting around Old Highway 80 in the Pine Valley area, according to the CHP. One caller said there were about 50 vehicles unable to drive because of black ice on the freeway. to report being stuck on westbound Interstate 8 near the Pine Valley checkpoint, which is about a mile east of Sunrise Highway and west of Buckman Springs Road. Motorists began calling CHP dispatchers around 9:15 a.m. “We have tons of calls out there, with people stopped on the side of the road.” Typically whiteout is caused by an even dense layer of low cloud over a snow field. “It is just actively snowing so they can just do so much,” said California Highway Patrol Officer Jared Grieshaber. White out conditions and 'zero visibility' are also possible with the warning across the Chicago area, 'making travel extremely difficult.' Power outages, wind gusts of up to 50 mph, and wind. Officials said there were three snowplows working the area but said they couldn’t keep up with the snow, which fell to the 2,000-foot level overnight. Thousands of people are injured or killed every year. The situation worsened a short time later when a big-rig jackknifed on the freeway around 10:30 a.m., blocking the slow lane and the shoulder. Blizzards occur when strong wind causes blowing snow and whiteout conditions, making roads impassable.
On Thursday, snow and rain fell on Interstate 8 where it turned into black ice, prompting dozens of drivers to come to a stop in the westbound lanes. Heavy snow and strong winds could cause whiteout conditions and extremely dangerous or impossible travel in these areas, especially Wednesday into Thursday. The stronger the wind the more it’s shifted and you can end up with really deep areas of snow piled against road sides, houses or anything that’s facing the wind.(Ana Ramirez/The San Diego Union-Tribune) See the blizzard crippling the northern Plains with near-white-out conditions.
The next ingredient is the wind, which must be at least 10 mph to get the snow on the move. The air temperature and dew point must be below 0☌ to give us cold and dry air.
Dry, powder snow is the easiest type of snow to move around because it doesn’t stick together like wet snow. What are snow drifts?Ī drift is where snow gets piled up as the wind blows across it. How do blizzards occur?īlizzards can occur either when snow is falling in windy conditions or when it is lifted from the ground by strong winds (known as a 'ground blizzard') or a combination of both facts.Ī 'whiteout' is an extreme form of blizzard in which downdrafts and heavy snowfall combine to create a situation in which it is impossible to tell the ground from the sky. The phrase originated in North America, the term originally referring to a blast of gunfire. At the Met Office we define a blizzard as moderate or heavy falling snow (either continuous or in the form of frequent showers) with winds speeds of 30 mph or more and a reasonably extensive snow cover reducing visibility to 200 metres or less.
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