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2/21-2/23 Weekend Possible Storm


Zelocita Weather

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The surface low moving into the lakes should fizzle completely around 0z Sunday. Dynamically I don't see any reason for it to survive. My thinking is this will look much more like an arctic frontal passage, than a SWFE. Perhaps more accurately, it's a hybrid of sorts as it transitions from the latter to the former. I can see a weak surface low wanting to form east of the cape, or near down east Maine...I'm thinking one of these two areas should take precedence.

The implications of this on coastal areas is potentially significant as the wind direction will have more of a westerly component (over land).

There is significant risk, in my opinion, that coastal areas surprise to the upside in terms of frozen precip.

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The surface low moving into the lakes should fizzle completely around 0z Sunday. Dynamically I don't see any reason for it to survive. My thinking is this will look much more like an arctic frontal passage, than a SWFE. Perhaps more accurately, it's a hybrid of sorts as it transitions from the latter to the former. I can see a weak surface low wanting to form east of the cape, or near down east Maine...I'm thinking one of these two areas should take precedence.

The implications of this on coastal areas is potentially significant as the wind direction will have more of a westerly component (over land).

There is significant risk, in my opinion, that coastal areas surprise to the upside in terms of frozen precip.

What about the departing high to the east?

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No it wasn't at all. 850's are cold and 540's are cold despite the 925 layer. If that layer is being overdone, it's all snow for the area and that's a big possibility it might be.

Wow, we definitely have a big difference of opinion here. "All Snow" is a big possibility? Check your area soundings please.

While I'm not sayng the Euro is completely accurate it can be used here to depict a few things since your comments were In Reference to the Euro run. Here are the freezing lines (surface, 925mb, 850mb and 5400m) per the Euro for the entire time period there is precip 00z, 06z and 12z. Like someone said above forget the 540's thickness for this event. Your problem for 2/3's or more of the tri-state is between the surface and 925mb.

post-2882-0-53944700-1424505927_thumb.jp

post-2882-0-44519900-1424505977_thumb.jp

post-2882-0-70629600-1424506002_thumb.jp

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Does anyone have the Srefs?

Per the 03z SREF plumes for a few select locales these were the means (avg).

TTN = 3.20" of snowfall and .95 total qpf were both means

EWR = 2.70" of snowfall and .79 total qpf were both means

HPN = 2.11" of snowfall and .70 total qpf were both means

LGA = 2.26" of snowfall and .79 total qpf were both means

JFK= 1.79" of snowfall and .83 total qpf were both means

ISP = 1.15" of snowfall and .91 total qpf were both means

Between 03z and 06z on Sunday (local NY time 10p to 1am) all locations switch over to freezing rain and then plain rain..

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6z nam crushes central NJ northward 6+ easy

Plus no change over all snow

I disagree with your "plus no change over all snow" comment on the 6z NAM run

By 06z on Sunday (1am local time) the entire tri state area is above freezing at 925mb's (except for an extreme extreme NW Jersey sliver) and at this same time SIM Radar is still showing precip falling. How is this all snow?

925mbs forecast time 6z Sunday (1am local)

post-2882-0-17969200-1424508495_thumb.jp

Sim radar same timeframe

post-2882-0-17244800-1424508592_thumb.jp

Your mistake is looking at the below 850 Temp & Precip map and calling it all snow when it is not. Please just don't look at the blue line and think that's the r/s line.

post-2882-0-51673600-1424508879_thumb.jp

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Well I have the CMC to back me up. Not worried about 925 temps

My reply was solely in reference to your 06z nam "comments". Not what model your going with now such as the CMC. Your analysis of the 6z NAM model run was incorrect. My intention is to help you understand for the next time what to look for and help stop the incorrect play by play of model information that is unfortunately frequent in this NYC forum.

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The Euro and GFS also say you should also be worried about your 925mb temps. Here is your text output for Manville, NJ per the 00z Euro. 2.1" of snow on the front end and .41 of rain there after.

attachicon.gifimage.jpg

I never use GFS or Euro on short range

The Nam and CMC and to a degree RGEM have been spot on under 24 hr range this winter

Lol we are not hitting 44 on Sunday you believe that I have a bridge to sell you in NY

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I never use GFS or Euro on short range

The Nam and CMC and to a degree RGEM have been spot on under 24 hr range this winter

Lol we are not hitting 44 on Sunday you believe that I have a bridge to sell you in NY

The NAM is not your friend here.. That's what I started off telling you when you thought the 6z run was crushing you.

I guess then hug tight your CMC and RGEM and hope for the best. I'm not looking to argue with you just try to accurately depict what each model is showing each run... Good Luck. I hope you get more snow than rain as you expect.

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That EURO run is way off on temps. Manville, NJ is not hitting 44 on sunday. Lol where have you been these past days?

None of my replies agree with or speak to a high temperature of 44. I only posted that text output to show the potential for rain for that area in the next 24-36 hours since that poster was incorrectly not given any credence to the warmer boundary level between the surface and 925mb during the precipitation period.

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