Yesterday morning was cold, this morning colder still… Old man winter is biting the Northern Rockies, Plains hard and early this year and it looks like further ‘waves’ of reinforcing cold will continue bleeding out of Canada through mid and late week before drifting into the Northeast by the weekend.

-21 at Elk Park, Montana this morning.

https://twitter.com/NWSGreatFalls/status/927929661191086080

https://twitter.com/NWSGreatFalls/status/927873207541125120

-9 degrees in north-central North Dakota.

https://twitter.com/DarylRitchison/status/927883279570755584

https://twitter.com/NWSBismarck/status/927897148477370368

-8 Minnesota

https://twitter.com/NWSGrandForks/status/927914943852183552

Temps are likely to exceed daily record cold maximum and minimums across the Great Lakes and Northeast late week into Saturday but core of coldest air will remain north over Ontario where thickness values dip to unusually low sub 500dm levels for November.

Temps into the low 20s for the Big Cities this early is quite impressive.