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jm1220

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Everything posted by jm1220

  1. jm1220
    Weenie deformation area north of the 700mb low. Wish I was back at my PSU stomping grounds now. They’ve waited literally 2 decades almost for a storm like this again lol.
  2. jm1220
    The big high should at least be enough to keep cold air in place long enough to make for a fun few hour thump to start that would mean half a foot or more anyway. By the time it warms up the precip is mostly over on the front end of the storm. And maybe it’s not done trending but for the city and even much of the island 90% of what fell on that Euro run was snow. I’m not too surprised, you have a stronger wave coming in you’ll see an amped NW trend. In a moderate Nina like this we need blocking with any storm since they will try to cut.
  3. jm1220
    And I think fairly safe to say now the GFS is out to lunch like usual and will trend north soon.
  4. jm1220
    Euro wasn’t terrible verbatim. The trend wasn’t good but cold air hangs around for most of the precip near the city. It still drops a foot or so in the city as is, assuming 10-1 ratio. I’ve been saying for days the low would try to hug and cut north, the confluence would have to work to force it east. If the upper air low comes in more vigorous and the confluence can’t compensate this is what happens. But honestly a hellacious front end thump to lighter precip that could be a mix in the dryslot might not be the worst. Won’t be the 20” weenie area north of the 700 low track but it’s not a quick slop to rain event either.
  5. jm1220
    Thanks. That 700mb low and track= big weenie run for NE PA/S NY/CT. Here it comes close but never really changes over, looks again to be more a dryslot issue after a huge initial thump.
  6. jm1220
    Yuck. Hopefully that's wrong. A low tucked just west of ACY=no bueno.
  7. jm1220
    Hasn't it just been upgraded or is that still coming?
  8. jm1220
    Can't see the thermals but not too dissimilar to the RGEM? I guess a huge front end thump and then dryslot/mix this run. Can't say it enough-700 mb low determines if that'll be a problem or not. GFS brings that off S NJ, this and the NAM seem to bring it through N NJ.
  9. jm1220
    Seems like the GFS just weakens the storm overall in the face of the confluence which causes these southern outcomes. NAM/RGEM keep the dynamics going longer and are able to get them further north. We'll see which is right...
  10. jm1220
    They aren't really all that NW. GFS is a somewhat suppressed outlier.
  11. jm1220
    There'll very likely be a weenie deform band just north of the 700 low track. Lots of sustained strong lift there and good ratios.
  12. jm1220
    Looks just about exactly like 18z to me. Looking more likely that this central PA to W CT jackpot band is legit.
  13. jm1220
    Snow and ice storm, December 5-6, 2003 - Storm Summary (raymondcmartinjr.com) Not to drag this off topic anymore but much of the state of PA had 8-12". Not saying that's an analog or any of these storms, but it's definitely possible to have heavy snow in Central PA, southern NYS and here.
  14. jm1220
    Jan 2016, Presidents Day 2003, 12/5/03 among others? A huge deformation band forms and pivots starting in South Central PA and drives north into W CT. That's the best place per the mid level dynamics and mid level low tracks on the Nam. Because those tracks are more lousy down here we get most of what we have from the initial warm air advection and then the leftover CCB coming east. Also it warms aloft: per soundings we wouldn't lose much to sleet-but would be close.
  15. jm1220
    On the 3k like the 12k much of this is a front end thump. By 6z, it gets above 0C at 800mb on LI and probably NYC very briefly but it's barely precipitating (what's falling would be sleet). Something of a CCB comes through and cools the column back down.
  16. jm1220
    Problem is really the dryslot this run for NYC and east. The 700mb low track should be a little further SE. It looks like a 3-5 hour crazy thump up front, light snow/sleet/mix in that dryslot, then whatever can come from the CCB as it slides east. There's 1-1.5" liquid for this area but 2"+ in a band from Torrington CT to State College, PA. That's where the huge totals would be.
  17. jm1220
    On the snow maps it does look like sleet cuts down accums for the city on south/east. The 10-1 map has 10" for the city
  18. jm1220
    On second thought really not much change from 18z to me, maybe a bit more amped.
  19. jm1220
    The warm air would come above 850mb, probably at 750-800mb. The 850 low track looks good so the warmth would come above that layer. That being said, the way the NAM evolves it could mean we all have an insane front end thump then sleet when the precip tapers down. By 9z there's a dryslot coming in.
  20. jm1220
    IDK, to me it looks more amped this run (not hugely but noticeable). I could definitely see how areas south of the city deal with sleet/rain for a time on this run. The 700 low looks to track maybe over or just north of the city, meaning warm air aloft will try to get in.
  21. jm1220
    Becoming cautiously optimistic for here but won’t take much to bring the mix line through to the sound. Seems as if it may be more an issue SW of here since the low hasn’t developed enough by the time it gets to PHL-TTN?
  22. jm1220
    Yep. Thank goodness we have that there or this is an easy washout.
  23. jm1220
    Over NJ they are screwed more by onshore winds from the NE than mid level warmth to me, at least from Toms River north. That evolution would be heavy snow Philly on north if it was a month later and waters colder.
  24. jm1220
    Not sure we can blame this on convective feedback. If the confluence says it can’t go north any further, that’s what happens.
  25. jm1220
    Looks like Upton going with around a foot or just over at this point for most of the NYC area, and sleet or rain cutting things back out east.
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