PM Update: Brutal blast of Arctic air by Saturday night; flurries possible Sunday


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So long 60-degrees. It’s been nice knowing you. Cold front number one moves through the region overnight. The big dog, cold front number two, blitzes the region Saturday. On Saturday night, temps tank with wind chills plunging into the teens. They don’t recover much Sunday when there could be a few snowflakes in the air.

Through Tonight: Enjoy these last few hours of 50-degree temps. You may have to dodge a shower or two (30 percent chance) between sunset and around midnight, but most of us stay dry. The core of the cold air is still a day away but overnight lows drop into the upper 30s in the colder suburbs to the low 40s downtown. Winds shift from out of the south (at 5-10 mph) to gusty out of the northwest at 15-20 mph after 10 p.m. or so.

Tomorrow (Saturday): Mostly sunny and breezy in the morning. Before the next cold front arrives, temperatures may make at run towards 50 early to mid-afternoon. But you’ll start to feel the Arctic caving in on us by late afternoon, as temps fall back towards 40. Winds – throughout the day – are from the northwest at 10-20 mph, with some higher gusts.

Saturday night: This will be a bit of a shock to the system. Temperatures tumble as winds crank. Much of the region is subfreezing before midnight, with overnight lows 21-26 (suburbs-city). Winds increase out of the northwest at 15-25, gusting over 30 mph. Morning wind chills are in the teens.

GFS model simulates wind chills in the mid-teens 7 a.m. Sunday (WeatherBell.com)

GFS model simulates wind chills in the mid-teens 7 a.m. Sunday (WeatherBell.com)

Sunday: Variably cloudy, windy and very cold. Scattered snow flurries are possible at times, especially in the northern and northwestern suburbs. Highs only reach the low-to-mid 30s with winds from the northwest at 15-25 mph, gusting over 35 mph at times.

GFS model simulates upper level disturbance diving through region Sunday, which may produce a few snow showers or flurries (WeatherBell.com)

GFS model simulates upper level disturbance diving through region Sunday, which may produce a few snow showers or flurries (WeatherBell.com)

See Camden Walker’s forecast through early next week. And if you haven’t already, join us on Facebook and follow us on Twitter . For related traffic news, check out Dr. Gridlock.

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