As the legendary Irving Berlin first wrote about in 1942, “I’m dreaming of a white Christmas.” Berlin was reminiscing about an old-fashioned Christmas setting, which as it seems from our earlier post, many of you do not want. However, if you were hoping for a little snow to put you in the Christmas mood, you may just luck out.
The NAM earlier today was not buying into the fact that enough cold air would wrap around on the backside of the low to transition rain over to snow. This afternoon, the 18Z NAM is starting to agree with the earlier solutions of GFS and GEM.
The GFS as shown above, is not at bullish with snowfall accumulations as the 18z NAM, which is pictured at the top of this post. Going on the fact that temperatures will start out warm enough Thursday morning for precipitation to fall as rain, this will have an impact on snowfall accumulations. This is why I believe that the GFS seems to be more reasonable at this current time. It does appear that very light snowfall accumulations will be possible though. As of now, accumulations should range from a dusting to a half an inch. If cooler air can get pulled into this system sooner, it may allow for a little more snow.
We will be watching this system closely as many of you will be traveling on Thursday. For the latest weather information visit iowachase.com, and for additional updates follow me on Twitter & Instagram @StormChaserZach, or on Facebook.
Have a great day!