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Winter Weather Threat Mode for (1/12-13/2018)


nWo

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I'm going to go ahead and go into a Winter Weather Threat Mode for Friday and Saturday. All indications are that a major winter storm could hit the Ohio Valley and Kentucky. The timing and accumulation amounts are still not in agreement by the weather models but they all are showing a major winter storm hitting Kentucky this upcoming weekend.

 

The NAM is showing some major accumulations of ice and snow for Kentucky.

 

Snow

 

nam snow.png

 

Ice

 

nam ice.png

 

The GFS

 

Snow

 

gfs snow.png

 

Ice

 

gfs ice friday.png

 

The Canadian

 

Snow

 

canadian  sbiw.png

 

Ice

 

canadian ice friday.png

 

As everyone can see if you take the information from the models even though they are not in total agreement there appears to be a major winter storm heading for Kentucky this weekend. Word of caution I'm not ready to issue any accumulation predictions as of yet. I want to see a couple more model runs before I do.

 

Everyone can take this information and make any preparations they see fit. I will update later today.

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So looking at the different models, how does one show 20 inches and the others show roughly 4 in the NKY area? How do they look at the same data and come up with such drastic differences?

 

It's just how the models read storms. Sometimes they have problems reading a storm a few days out. They should start coming closer together as we get closer to Friday. Also that is one reason I don't put out accumulation totals until the event gets closer. Things will change.

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So looking at the different models, how does one show 20 inches and the others show roughly 4 in the NKY area? How do they look at the same data and come up with such drastic differences?

 

The way it was explained to me by an old friend is, during times like this, when the weather is so warm.

 

They have a pretty good idea of how much total precipitation we will have, but it's really hard to predict the temperature drop when rain will turn to snow.

 

Where I grew up, up north, the rain to snow conversion was 1" of rain equals 10" of snow. Down here I think it's more like 1" to 7".

 

So if they are figuring a 3" rain equivalent. Depending on what point that turns to snow you might get 2 1/2" of rain and 3" of snow, or you could get 21" of snow.

 

@nWo will have to help us to say if that explanation is on track, but that's what I've been told in the past.

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Same here. If it's gonna snow, let's have it come on a Friday afternoon/night and let's have it be massive.

 

It can snow all it wants. While I’m not a big fan of winter, things just don’t seem right, unless we get a couple big snows. Seems like it has been way too long. I kinda like watching big snow events unfold. And now that I work from home and don’t really have to travel in it, it’s even better. Just need to make sure I have enough alcohol to last me through the weekend.

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