If I remember correctly, it started out as a SW flow event that transferred to a coastal. I recall the NYC people getting really excited about the 2/24 storm, and I told them they should forget about the first event since it was a SW flow situation with no arctic high to the north (you can see the -20C contour on the reanalysis maps is barely touching Northern Labrador), and concentrate on the 2/25 Snowicane. This turned out to be a prescient forecast as NYC was all rain in the first storm, but Central Park got 20" in the Snowicane while places 50 miles to the north like Highland Mills NY and Harriman NY saw over 30".
I may have gone downhill since with my mediocre Winter 10-11 forecast, but I was on a hot streak in forecasting at this point....I was repeatedly criticized in the NYC threads for suggesting that the 2/24 storm was going to be a rain event, but I went on our radio show on WRMC at Middlebury with Andrew and called for 16-20" at Middlebury (about 48 hours out) when the NWS was only forecasting like 6-10". Everyone played the storm extremely conservatively including both the BTV NWS and the TV stations, but Skier and I were convinced it was going to be solid for the Champlain Valley because we had a strong moisture stream coming south out of the Hudson Valley, which has a direct feed into the CPV, and heavy precipitation in a short period of time, which tends to reduce the downsloping effect and allow the Champlain Valley to do well compared to the more elevated areas. Usually, long-duration, light precipitation storms are when downsloping gets the best of the Middlebury area, but this was an 8-hour thump that could maximize accumulations at low elevations with marginal temperatures. Skier called for 12-16" while I went pedal to the metal and called for 16-20", both of which were FAR more than the NWS forecasts, and we ended up doing very well on the event. The campus, according to our measurements, received 20" of paste, some of the heaviest snow I'd ever seen...made for a beautiful sight on all the old buildings. When I woke up the morning of the Snowicane back in NYC, I immediately said I thought Central Park would get 20"+ based on the strong radar echoes streaming from the NE and the fact that Central Park had started as mostly snow whereas other stations like HPN/White Plains were reporting rain at 32/32 or 33/32. This was also a good forecast as they had a bit over 20", and suburbs to the north like mine got pasted.
This was the most snow I'd seen in 2 days, 46". I drove home right after the 2/24 storm, steering carefully on the snowy Vermont roads at 1am in an attempt to get home for the Snowicane despite a very heavy workload in the middle of 2nd semester of senior year. I arrived home to a rain/snow mix, slept for 6 hours, awoke to a whiteout. Those were two great storms....the first was just so unexpected because the BTV NWS and the Vermont TV stations did not give the storm the proper billing, and the Snowicane was an absolute nail-biter with the 0C 850 contour right over Westchester County...somehow I stayed all snow at 350' elevation despite mixing to my west near Nyack NY and to my northeast at HPN/White Plains Airport. The 26" I measured was not indicative of downtown, however, as I took my final measurements in the woods behind my house closer to 400' altitude. The Scarsdale Wunderground station, which is a more built-up area a couple hundred of feet lower, was at 33.9F for much of the day and did not accumulate as well. I'd say the town of Dobbs Ferry had 21-22", though I didn't measure there, just noticed the drop-off. This was such a weenie period of my life....never mind that I was in the middle of my thesis and last semester at Midd, I walked around all day during the 2/24 storm, hiking up to a hill at 800'...then I arrived home at 4am the next morning to see the Snowicane. I was glad I forecasted the event well as we had people like environmentalist Bill McKibben and a couple environmental science professors sometimes tuning in to our show.