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March 2023


Rjay
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Upton NWS disco 


LONG TERM /THURSDAY THROUGH MONDAY/...
No changes were made to the long term forecast Thursday through next
Monday.

Another piece of PAC energy sets its eyes on the area late in the
week into the weekend. The operational global models are in very
good agreement in taking this energy and closing off an upper low in
the vicinity of the the Northern Plains and/or Upper Midwest
Thursday night into Friday, then diving the system ESE and off the
Mid Atlantic coast Saturday. This will allow for a secondary low to
form along the coast as the upper forcing approaches. Greatest
uncertainty lies where the secondary forms. GEFs is the northernmost
of the ensemble means and has good clustering just south of Long
Island, however, the EPS and GEPs means are much farther south and
also support their operations runs. NBM wind field, which was
closely followed, reflects a track south of the forecast area.

Like so many southern branch systems this year, the track and lack
of available cold air, has resulted more often in liquid than frozen
precipitation events. This event is no different. In addition,
unlike the last 2 systems, there is no block across eastern Canada
with cold air source bleeding cold air south across New England.
Thus, this looks to be a mainly rain event with a rain/snow mix
possible on the backside Saturday night.

Prior to that time, offshore low pressure and a northerly flow from
eastern Canada into New England will result in temperatures near
normal with highs in the 40s and lows in the 20s inland and 30s at
the coast. High pressure to the west slowly builds into Thursday
until weakening and moving offshore Friday ahead of the
aforementioned coastal low. While it will still be breezy on
Thursday, gusts should be weaker than Tuesday and Wednesday,
generally 20-25 mph. Winds weaken further for Friday with high
pressure over the area. Over the weekend, temperatures will depend
on the exact track of the low, but subtle departures are forecast
from the mid week period.

It should be noted that NBM probabilities for seeing greater than 1
inch of liquid equivalent in 24h for the potential weekend system
have held fallen a bit to 15 to 30 percent percent. For 2 inches, it
remains generally under 5 percent.

https://forecast.weather.gov/product.php?site=OKX&issuedby=OKX&product=AFD&format=CI&version=1&glossary=1&highlight=off

 

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37 minutes ago, MANDA said:

That didn’t take long!  About 8:00 this morning and 3:00 this afternoon.  

401F39A6-DDEF-4A07-BDF9-07B8B4D49A57.jpeg

C36EC3D6-ADA9-4904-84E4-A4E3773DACD0.jpeg

Yeah March snows blow down here. It's really rare to get them to stick around which is why 2015 was extra special in that regard.

I remember a deep pack 1st week of March, almost unheard of around here.

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4 minutes ago, SnoSki14 said:

Yeah March snows blow down here. It's really rare to get them to stick around which is why 2015 was extra special in that regard.

I remember a deep pack 1st week of March, almost unheard of around here.

Don’t cry because it’s over, smile because it happened. 

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A colder regime will very likely commence later this week. At present, no severe March cold appears likely. However, the March 13-20 timeframe could be the month's coldest week with temperatures averaging 4°- 7° below normal for the week. The colder regime will gradually fade afterward, but could persist through the closing week of March.

Potential storminess around the March 11-12 timeframe has become less impressive on the ensembles. However, a second potential system has emerged for the March 13-15 timeframe. There is the potential for at least some snowfall in New York City, Newark, and Philadelphia with either potential system. The first will likely be mostly rain for the cities. Uncertainty persists, but the picture should become clearer near or just after midweek for the earlier system and late this week or the weekend for the latter one.

Historic experience with very low snowfall totals through February argues that a very snowy March or big snowstorm during March or April are unlikely. Despite attractive 500 mb patterns, the base case is that at least through March 10th, snowfall will likely be below normal from Philadelphia to New York City.

For further historical perspective, there were 16 winters that had less than 8" of snowfall through February in New York City. Just two (13%) had a 6" or greater snowstorm during March or April: 1889-1890: 6.0" on March 19th and 1991-1992: 6.2" on March 19th. Historical perspective argues for caution when the operational models are popping big snowstorms into and out of existence like quantum particles in the extended range.

The ENSO Region 1+2 anomaly was +1.1°C and the Region 3.4 anomaly was -0.2°C for the week centered around March 1. For the past six weeks, the ENSO Region 1+2 anomaly has averaged +0.48°C and the ENSO Region 3.4 anomaly has averaged -0.43°C. La Niña conditions have now given way to neutral ENSO conditions. Neutral ENSO conditions will likely prevail through at least mid-spring.

The SOI was +7.42 today.

The preliminary Arctic Oscillation (AO) was -2.487 today.

On March 5 the MJO was in Phase 7 at an amplitude of 3.284 (RMM). The March 4-adjusted amplitude was 3.030 (RMM).

Based on sensitivity analysis applied to the latest guidance, there is an implied 56% probability that New York City will have a colder than normal March (1991-2020 normal). March will likely finish with a mean temperature near 42.0° (0.8° below normal).

 

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18Z Euro not a bad hit for first wave
 

Even hits my area with 5”+ in the elevations of N MD. Nice shift for wave 1 for sure. Day 4 is a great range to see improvements pop up on the EC.

My folks live in Rockland county (new city) so I’m always in here and rooting for you guys as well. We all need some love these next 2 weeks.
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24 minutes ago, SnowGoose69 said:

This is a case where you just need things to be perfect where the transfer is late enough that the system bombs in the right spot and it does not occlude too ast

If you referring to this Sat I’m mostly giving up on a big storm idea and hoping for a few inches although def see how it could be something bigger. 

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