Chinook

One of my ideas is that La Nina slows down the subtropical jet and enhances the polar jet along the US-Canada border (going into winter months) You can see on this chart the 30-day 250mb jet stream has been much less westerly than normal from Hawaii to San Francisco, which makes lots of sense with this idea. I also think the La Nina leads to greater wind events for Colorado. (Like today) There is definitely an upper level ridge in the averages, over the Pac NW, leading to lower precipitation out West. And a large Greenland block-Labrador Sea block.

Boulder probably had some trees down today

we got all sorts of wind and fire out here! (probably not that much fire)

I don't think I've seen much rain in Montana in winter

I forgot to mention this yesterday, but one of the Glacier National Park web cams had water drops, that is, rain. That is a result of such warm air.

radar from Wilmington OH from a couple hours ago

large section of -25F temps in Saskatchewan, also large section of -15F in Minnesota

snow reports and radar from Michigan

Milwaukee area radar

85mph at Berthoud Pass and 79mph on lower ground

Minneapolis radar

radar and snow reports from Virginia

I don't think I've seen a Rocky Mountain single storm report with over 5 ft until now

radar out of Davenport