Winter Weather Update

Here is some of the latest temperatures over Canada and the United States. As you can see some very cold air has massed across Canada. It will be quickly surging south then east over the next couple of days. Sub-Zero temperatures have seeped into Montana, as blizzard warnings covered Montana, Wyoming, North and South Dakota. This Arctic cold front will race south and will be from Sunday Evening from the Panhandle of Texas to Northern Arkansas to Western Illinois. Lot of questions still exist on the density of the cold air and far south it will run. As models are almost laughable in warmth in my eyes across the Southern Plains and Ohio Valley. Here are the GFS MOS data from 18z ( 1pm Saturday afternoon)

For Example: Model Data prints out high temperatures vs. what I believe

Lawton Indianapolis

Mon. 37 28 40 Falling Temps to the 20s

Tue. 43 33 36 28

Wed. 48 34 36 27

Thurs. 55 39 41 35

You can notice I'm a lot lower in temperatures as the models are not picking up on the shallow dense cold air. That will make it a lot further south and last longer then what the model thinks. Another reason the cold air will be able to last is the expanding snow cover this week down to the I-40 corridor in the Southern Plains and I-70 across the Midwest and Ohio Valley. As the cold air will continue to build with high pressures expanding over the large snow pack in Canada and diving south.

Snow/Ice Map will be issued tomorrow with the timing of the systems this week. Fast flow as cold air surges south with several weak weather systems.