Eastern Kentucky Weather

Weekend Snow, More Arctic Cold

Chief Meteorologist Shane Smith has more on the snow potential for the weekend, as well as the brutal cold that follows it.

 For those just wanting a quick look at the Snow Forecast, and the 7-Day forecast here they are!: 
 

 

 

As you can see once we get past the snow, we've got some absolutely frigid cold weather heading our way next week.

So let's talk a little bit about why this a very difficult snow forecast, and why there is some difference between our forecast and some others floating out and about.  As we've talked about before on the blog, there are several different forecasting models.  Each of these models is showing something different for this storm.  
 

GFS:

NAM:




Canadian:


As you can see no agreement, but they are all showing something at least.  The main thing that makes me think we may not get into a widespread 2-4" scenario is the amount of dry air at the surface.  Have your lips been extremely chap today?  It's because of the dry air.  We measure moisture in the atmosphere with a reading called the Dew Point.  It's the temperature at which the air is saturated and can hold no more water.  So if we had a temperature of 25, and a dew point of 25, the air would be incredibly moist.  As of this writing, the air temperatures are in the teens and twenties, but the dew points are in the single digits and below zero.

 

 Before that snow can start hitting the ground, the atmosphere is going to have to moisten up a bit.  For that to happen that snow is going to have to fall and evaporate as it hits that drier air.  This will likely eat some of the accumulation some of the models are showing.
 

Brandon Orr will be in tomorrow morning to track the snow on Mountain News Morning Edition starting at 7:00 AM.  I will bring you updates all day on Social Media.  Be sure to follow me on Twitter @ShaneWYMT.  Until next time, take care!

 

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