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February 8th Potential Bomb Part II


earthlight

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yes more important than actual amount of precip or low track, such high qpf signifies some agreement of CCB development overhead. Like we were all saying earlier this is imperative for this to be a significant storm for us. Too late we end up with slop. 

Agreed, the other option is that the primary dies out quickly, the coastal takes over but the phase is late and it's a complete miss. That is pretty much what the 12z NAM was showing.

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This has the potential of having the biggest snowfall spread between Boston and NYC since

the April fools storm of 1997. All other occasions of big snows in Boston had a smaller

spread between NYC.

 

I still do not get to this day how we saw nothing in that storm, the setup if you look at it was perfect, 850/700 low...everything

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One thing we're going to have to watch out for is convection in/near the Gulf with our southern stream wave. The more convection and thunderstorms we see, the more likely we are to see a positive feedback response for increased heights out ahead of the wave. The increased heights out ahead of the wave would allow the southern stream wave to amplify a bit more and not race to the northeast as quickly. 

 

The northern stream was fine on the Euro, but the southern stream was not. But seeing lots of convection would be a good sign. That helped us out for Boxing Day. 

 

nice tidbit!

that's your rutgers education kicking in.

 

no penn state grad would have come up with that.

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Wow. Upton has more than 50% of precip as rain.

 

stormtotalsnowfcst.png

stormtotalqpffcst.png

That's from this morning taking into account 0z runs at the latest, GFS was not quite onboard for us at 0z, and it's 12z run is much more. Would expect those numbers to go up when the afternoon package comes out.

 

-skisheep

 

EDIT: Map seems to have been updated at 1:22, but it's the identical map from this morning. Would expect those numbers to increase with the afternoon package, probably 20-30% higher.

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This isn't a warning though it's just a watch, which means that it's a possibility but there is still uncertainty.  Right now with all models showing warning criteria snowfall I think a watch makes sense.  It can always be downgraded later.

this definitely makes sense...i agree. But why not wait until after the 0Z models tonight...

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I just saw the Euro Accuweather pro snowfall map:

 

3-6" from TTN north and east into about Union County and southern Hunterdon County. The 6"+ line runs north and east of that through NYC and most of LI, though eastern Suffolk gets 9"+. 

 

Extreme SW CT also gets about 9-12", as does southern Upstate NY. I'm not great with the counties, but I'd say about 20-30 miles north of NYC is where the 9" line is, but you don't have to go too far NE to get into the 12" line.

 

So I guess verbatim, JFK looks to be exactly 6", NYC maybe 7", Nassau County probably 6-9" (less west, more east), and Suffolk gets 9-13" (less west, more east). 

 

This map assumes a 10:1 snow to rain ratio. 

 

Edit: I made a few changes to this post. 

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I just saw the Euro Accuweather pro snowfall map:

 

3-6" from TTN north and east into about Union County and southern Hunterdon County. The 6"+ line runs north and east of that through NYC and most of LI, though eastern Suffolk gets 12"+. 

 

Extreme SW CT also gets about a foot, as does southern Upstate NY. I'm not great with the counties, but I'd say about 20-30 miles north of NYC is where the 12" line is. 

 

So I guess verbatim, JFK looks to be exactly 6", NYC maybe 7", Nassau County probably 6-10" (less west, more east), and Suffolk gets 10-18" (less west, more east). 

 

This map assumes a 10:1 snow to rain ratio. 

A foot, not bad, I'll take it! What's timing look like for the changeover to rain and back to snow?

 

-skisheep

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I just saw the Euro Accuweather pro snowfall map:

 

3-6" from TTN north and east into about Union County and southern Hunterdon County. The 6"+ line runs north and east of that through NYC and most of LI, though eastern Suffolk gets 12"+. 

 

Extreme SW CT also gets about a foot, as does southern Upstate NY. I'm not great with the counties, but I'd say about 20-30 miles north of NYC is where the 12" line is. 

 

So I guess verbatim, JFK looks to be exactly 6", NYC maybe 7", Nassau County probably 6-10" (less west, more east), and Suffolk gets 10-18" (less west, more east). 

 

This map assumes a 10:1 snow to rain ratio. 

What about KMMU?

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