February 17-18 Storm Update

Tonight’s storm is proving to be a tricky one to forecast, a difference of 20-30 miles in the track of the storm will mean a significant difference in snowfall totals. As of now my forecast for tonight is as follows: Precipitation will overspread the region from West to East beginning around 6 or 7 PM. Precipitation may be in the form of rain or light snow, I’d lean towards light snow in NYC and Western areas and rain the further East you go on Long Island. The precipitation will begin to change to all snow during the evening, with the changeover happening earlier further North and West first. Precipitation will end by sunrise Sunday morning. This is looking like a classic storm where the North Shore of Nassau and Queens/NYC will see an earlier changeover than the South shore and Suffolk. As of now, the battleground for Rain/Snow looks to be the LIE in Nassau county and Queens, in Suffolk the changeover line may be closer to 347 or 25. I will caution that if the storm tracks further North or South the changeover line will have to be adjusted. I probably will have a better idea of where this line will set up this evening as the storm is starting. Below is my first guess/call for this storm, but I’ll caution that I have lower confidence than usual in this forecast.  One final thing to keep in mind is that tomorrow temperatures will rise into the lower 40’s and whatever snow does fall will likely melt during the day.

 

February 17-18 Snow Event

It looks like our luck has run out and we are likely to see some snow overnight Saturday into Sunday. As of this afternoon, it is difficult to lock down exact totals, since our area is right on the border between rain and snow. It is likely that parts of the North Shore of Long Island and Northern parts of NYC will be seeing heavy snow while the immediate South facing shores will be raining. As of now, my best forecast is that light snow and/or rain will overspread our area late Saturday night (8-11 PM time frame) and continue until around sunrise Sunday. Depending on the exact track of the low and strength, snowfall totals may end up being under an inch in some areas to as high as 5 or 6 in others. For now, the safe call is 2-4″ on the northern half of the Island, and 1-3″ on the Southern half. The other key factor in all of this is temperatures on Sunday and Monday will stay above freezing, and therefore whatever snow does fall will melt quickly. More updates to come tonight and tomorrow.

Below are a few examples of the potential snowfall, showing the wide variance in guidance: