Latest forecast models show heavy, widespread snow across the Chicago is predicted to start around noon, with conditions "rapidly deteriorating" as the day continues, NBC 5 Storm Team meteorologist Paul Deanno says.Īround 3 p.m., snow is expected to be more widespread, and heavy at times, the NBC 5 Storm Team says. Strong winds of up to 25 miles-per-hour will also start to develop. Some snow is expected to develop, with accumulation predictions up to two inches. #ILwx #INwx (4/6) /2NyIrVaXCs- NWS Chicago DecemThursday MorningĪccording to NBC 5 Storm Team, temperatures Thursday morning are expected to remain in the 20s and 30s. Impacts from this storm will be driven by a combination of cold, wind, and snow rather than snow alone! Avoid non-essential travel. Here’s a timeline of the dangerous winter weather today through Saturday. Live Winter Storm Updates: Secretary of State Offices Join Growing List of Closures As Winter Storm Rolls InĬonditions for frostbite are expected, and power outages are also a possibility, thanks to wind gusts up to 50 miles-per-hour.Īnd although the latest snow total predictions remain between three and six inches, with most of it occurring Thursday afternoon and into the evening, the combination of "gusty winds, and plummeting temperatures will make travel conditions treacherous from Thursday afternoon onward," the NWS says. Latest forecast models show snow and blowing snow may result in "white- out conditions" that lead to zero visibility at times, making travel "extremely difficult." As dangerous temperatures plummet from 30 degrees to 16 degrees and wind chills as low as 25 to 35 degrees below-zero move in Thursday afternoon, roads are expected to become quickly iced-over. Sign up for the weekly Chicago Catch-Up newsletter here. 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.Feeling out of the loop? We'll catch you up on the Chicago news you need to know. 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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