Sorry, just a quick heads-up for travel problems since we’re already having heavier-than-expected ice accumulations this morning. The very cold temps at ground level are causing some immediate glazing. Warmer air is flooding northward on the backside of a strong storm (central Iowa to Milwaukee and points north are getting hammered). Rain at altitude is falling into cold air at the surface and freezing on contact. There are already a bunch of accidents on the roads, and even some untreated sidewalks are going to be slippery by this afternoon.
- Freezing rain and sleet through sunset. A period of rain possible far south burbs.
- Rain could shift north tonight as temps continue to moderate.
- Precip should shift back to all snow by tomorrow morning. Totals should be <1”.
Again, roads are becoming an issue, and O’Hare is already backing up under a ground delay program.
A sunnier, dry and seasonable day on Thursday gives way to an Arctic blast on Friday (highs <10F, with our first <0 lows of the season possible on Friday and Saturday morning). Temps will be cold but closer to seasonal norms as Saturday and Sunday add ~10 degrees each.
Another storm worth watching will traverse the country early next week. If things play out as they look now, that storm could pull down the coldest air of the season a week from now. In fact, some models are putting out crazy numbers – one of those lobes of polar air dislodged a few weeks ago could be parked right over the middle of the country, and if so we could see temperatures that have only happened a few times in 30-40 years.
The broader picture of the next 7-14 days is similar to what we’ve just had. Periodic storms are riding across North America as these lobes of frigid air collide with milder air to the south. 1-2 days of frigid temps are then replaced by more seasonable (but still cold) air. The overall pattern thus averages out to well below normal, and for now there is no sign of a flip back to the extremely pattern of December and early January.
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