Round two is here! Snow begins around daybreak in W OK and travels eastward into C OK by mid to late morning. The system will wrap up by late evening so expect at least flurries through 9pm. Until then, watch for any freezing fog that develops as that could lead to black ice on roadways.

7am snow in W OK.

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Snow at noon.

9pm snow moving out.

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I’ve notice a new trend today in the model data. Bump up snow totals and shift the heaviest into C OK. Not all models agree, but a couple I like do. The reason is the track of the 700mb low is going to move east right along I-40 and as you’ll notice in the humidity map below, this creates a type of deformation zone that develops along that corridor into C OK. This means much higher snow totals due to these enhanced mesoscale bands.

700mb moisture convergence.

European model snow totals.

Canadian model snow totals.

Hi-res short-term model snow totals.

I like a blend of the Canadian and the Hi-res model, although the Euro isn’t bad. It just doesn’t detect the banding setting up on the south end of the interstate. This means Norman and Moore may make up for Sunday’s lack luster snow totals in that area.

Regarding temperatures, it will be another day holding into the low 30s, so the snow will be wet and heavy. Great for those snowball fights and snowmen! After tomorrow, there may be some additional freezing fog Wednesday morning, otherwise a slow warming trend will begin. The long range shows us cooling down for Christmas Eve and Christmas Day.

Temperatures Tuesday afternoon.

OKC temperature trend.

Tulsa temperature trend.

For those that missed my live broadcast discussing all of the weather data, you can check out the replay below:

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