From NWS Atlanta afternoon disco
“I feel like I`m having to do this too much for a
meteorologist in Georgia, but let`s once again take a moment to discuss the potential for some winter weather middle of next week. Yet again, we are seeing a few of the operational models occasionally spit out a significant winter event for our area, giving some eye popping 10:1 snow maps ripe for slapping up on social media. With signs that we will have yet another significant Arctic
front move through the area by the end of the week into early next week, we will certainly be in a set-up that *could*, once again, bring
winter weather into the
CWA. Cold air will be well into the Gulf, establishing a
baroclinic zone along the coast, and there are signs of a
shortwave that may be able to tap into that for surface low formation and have a decent connection to the subtropics to pull in some
moisture. However, so far, of the 2-3 potential winter setups like this we`ve seen the models spit out this winter season, 1 has panned out. Getting all the ingredients in line at the right time in the right way is always tough here. To emphasize this, looking at
ensemble model probabilities across the 12Z guidance for getting >1" of snow, the GEFS shows around 5%, the European
ensemble around 10-15%, and the Canadian about 5% only in northern GA. Could it happen? Absolutely. These probabilities are certainly much higher than the typically
probability of snow on a given day in the winter in Georgia (<1% in most places). But despite a deterministic model run spitting out big numbers, there are still plenty of model runs where things just can`t quite get lined up. So, keep an eye on the forecast, know the possibility is there, and we`ll have a much better idea of if we can get things to come together the closer in time we get to the potential event.
Lusk”