bluewave

3” in one hour.

Thundersnow earlier in NY Harbor.

It’s great to see that winter finally put in a cameo appearance this year compared to what we have been getting recently.

Yeah, roughly similar for the entire OKX forecast zones. The statistics below go back to 2010. It’s good to finally see an event in late February which hasn’t happened since 2010. February has really been more frontloaded for these major 12”+ events. Roughly 2 week snowfall periods for the 2010's and number of 12"+ snowstorms Oct 29-Nov 15.....3 Nov 16-Nov 30....0 Dec 1- Dec 15.....0 Dec 16-Dec 31....3 Jan1-Jan 15.......4 Jan16-Jan 31.....7 Feb 1-Feb 15.....7 Feb 16-Feb 28...1 Mar 1- Mar 15....6 Mar 16-Mar 31...1 Apr 1-Apr 16.....0 Individual events and the highest snowfall totals 2026 Jan 25-26….Bridgeport…15.3” 2022 Jan 28-29….Islip….24.7 2021 Jan 31-Feb 2....Blomingdale, NJ.....26.1 2020 Dec 16-17 East Tremont, NY....12.4 2019 Mar 3-4...Monroe, CT....12.0 2018 Nov 15....Mount Hope, NY.......18.3 Mar 21-22...Patchogue, NY......20.1 Mar 13...Southampton,NY.....18.3 Mar 8....New Farfield, CT..........26.8 Mar 2...Monroe, NY.................14.0 Jan 4...Islip, NY.......................15.8 2017 Mar 14...Montgomery, NY.......23.5 Feb 9...Selden, NY...................16.0 Jan 7...Orient, NY....................12.5 2016 Feb 5...Setauket, NY................12.0 Jan 23..JFK,NY.........................30.5 2015 Feb 2..New Faifield, CT............12.0 Jan 26-27....Orient,NY.............28.5 2014 Feb 13-14...Roselle, NJ............16.7 Jan 21-22....Centerreach,NY....14.0 Jan 2-3......Lindenhurst, NY.....12.5 2013 Mar 8....Harriman,NY..............15.0 Feb 8....Upton, NY..................30.9 2012 Nov 7-8.....Monroe, CT..........13.5 Jan 21......North Haven, CT....12.0 2011 Oct 29.....Harriman, NY.........16.0 Jan 26-27...NYC................... 19.0 Jan 11-12.......Meriden, CT....29.0 2010 Feb 25-26...Mount Hope, NY...27.5 Dec 26........Elizabeth, NJ........31.8 Feb. 10.....Sound Beach, NY....16.2 2009 Dec 19-20....Upton, NY..........26.3

First blizzard warning in any of the OKX zones since January 2022. https://mesonet.agron.iastate.edu/plotting/auto/?_wait=no&q=92&phenomena=BZ&significance=W&e=all&_opt_edate=on&edate=2026%2F02%2F21&_r=t&dpi=100&_fmt=png

How have you been doing? Everyone has been asking about you. Really glad you are back.

I like the model blend idea of a Monmouth and Ocean County NJ to Suffolk County jackpot going potentially 18”+ in those areas. The storm track near or just east of the 40/70 benchmark usually favors this scenario. Most other areas are looking like a solid 12”+. The blizzard conditions will make measurement a challenge and there will be the best drifting potential in years.

That one actually came far enough west for some brief snow pellets in Long Beach when the best banding was parked over NNJ. Still one of my favorite blizzards even though I missed the heaviest. Some of the best drifting in Long Beach since February 1978. Long Island probably holds the edge for jackpots over NNJ since many of these systems loop just east of the benchmark with the best banding from Monmouth County across Suffolk County.

Boxing Day jackpotted west of NYC since it tracked west of the benchmark and brushed Cape Cod. https://www.weather.gov/okx/Meteorology12262010

Excellent article. Thanks very much for posting. The AIFS single was really amplified with this system since later last weekend. I like that it corrects the OP Euro and ensembles suppression tendency we have often seen since the Euro upgrade around 2015 with coastal storms along the East Coast. Open Snow also put out the best seasonal long range winter forecast that I have seen for this winter back in November. Although the write-up didn’t mention it, wonder if they have an experimental in house AI seasonal forecast tool which they didn’t want to mention yet? https://opensnow.com/news/post/november-update-2025-2026-winter-forecast-preview Skilful global seasonal predictions from a machine learning weather model trained on reanalysis data https://www.nature.com/articles/s41612-025-01198-3

Yeah, the Euro AI single meets in the middle between the GFS and other guidance. Has the 2” liquid line from MTP to Ocean county NJ. If that verified exactly, then we could see one primary band further west from Monmouth out into Suffolk. So with the great lifting someone could potentially go 18”+. Would like to see the other guidance come on board by 12z tomorrow to have confidence that some areas could reach those totals. But we don’t have to know for sure until the 12z runs tomorrow.

That’s what everyone want’s to see starting at 0z. Since the NAM is still outside its best under 48 hr range and it hasn’t had an update since 2017. Plus the OP GFS is still more amped and further west than the other operational guidance. But I can see a meet in the middle scenario where we come in under than the OP GFS snowfall totals but higher than some of the other operational runs. We should have a good idea after the 0z to 12z guidance. Sometimes the max banding potential can sneak a little more west than the average of the guidance.

The Canadian Ensemble mean also has 12”+ potential getting closer to NYC.

Even the AI GFS is further east than the OP with a slightly slower capture and negative tilt.

I believe this would be a first for the GFS being the most tucked in near the coast with a snowstorm among the other globals and being correct. The NAM has done it numerous times. But the only other big GFS coup was being more east in January 2015.

It’s great to see the Euro AI correct the East Coast storm suppression issues that the regular Euro has since the upgrade around 2015.

I believe the 2-1-21 KU event and the follow up system about a week later. But the Canadian did have the wild further west run about week before which was close to what verified. Even though the Euro was too suppressed for both systems.

That was our last top tier KU event in December.

We all did great with that one but the jackpot was west of the Hudson in NJ.

Yeah, most events jackpot either east of NYC or to the west. January 2016 and 2006 were the rare events that maxed out right across NYC and the boroughs. The heaviest snow for any given event usually ends up in the interior or across Long Island.

It’s the always last 12 to 48 hrs of the forecast which really counts. We won’t be there until tomorrow into the Sunday 0z runs. But it’s certainly possible that we get a meet in the middle scenario between the most westerly GFS and the other guidance.

The GFS is the only model going negative tilt so fast so the low tucks in more near the coast. All the other guidance has the low consolidating a little further east and a slower negative tilt. The GFS is usually incorrect when its coastal low is the furthest west of all the other guidance. Sometimes the Euro does the same thing. I would probably shade toward the other guidance at this point and just broad brush the forecast to indicate that the chances for a 6”+ event near the coast are increasing and issue winter storm watches and wait until tomorrow to refine the warnings and higher end potential areas.

My only issue with the OP GFS is that the low further east usually becomes the main low like the Canadian and other guidance is showing.

The 12z Canadian also had a nice run showing 6”+ potential closer to the coast.

This is a great example of why we use the ensemble means at this range. The EPS AIFS has been very steady for days now with only gradual shifts from run to run. It hasn’t shown any big jumps from run to run like OPs. The OP runs should begin to converge over the next 24 hrs.