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NYC Area January 26-27 Bomb Discussion and OBS


earthlight

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The UVV's are expansive and look great, but the QPF just has a hard time getting far north. There's a good area of NW NJ and NE PA that has a great signal at 700mb but the QPF fields are lacking on the NAM thus far in those areas.

just looking at the blossoming and surging radars on the pa/md border, it's hard to believe that's going to match the 06 nam 12 hr qpf total of zero, north of the mason dixon line.

http://www.accuweath...r.asp?play=true

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Sharp gradient once again to the northwest.

I'm still convinced the NAM is adjusting. The RUC is way northwest--which is a great sign. The NAM expanded the vertical velocities dramatically but didn't totally get the QPF there yet. Regardless..that's a huge band sitting from PHL to pretty much Staten Island..and serious ripping underneath it.

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I'm still convinced the NAM is adjusting. The RUC is way northwest--which is a great sign. The NAM expanded the vertical velocities dramatically but didn't totally get the QPF there yet. Regardless..that's a huge band sitting from PHL to pretty much Staten Island..and serious ripping underneath it.

Which also means subsidence, particularly with that solution. It might not be so far fetched were the deformation zone signature to verify. Coastal areas will have no problems squeezing out a solid amount of liquid with a verbatim track, but further NW? Definitely worth thinking about after already seeing a fairly similar gradient on the 0z GFS.

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Which also means subsidence, particularly with that solution. It might not be so far fetched were the deformation zone signature to verify. Coastal areas will have no problems squeezing out a solid amount of liquid with a verbatim track, but further NW? Definitely worth thinking about after already seeing a fairly similar gradient on the 0z GFS.

It's worth nothing that a "gradient band" as I like to call it almost always sets up along where the models have a tight gradient. I've literally seen this the last 6 coastal storms I've tracked. Somebody along the fringes of the QPF is going to get in on it.

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I had to give the MA a good go for once. thumbsupsmileyanim.gif

You guys are lucky--the boredom continues out here and the EC gets storm after storm. Snowman.gif

Gotcha, you're jumping around the entire east coast!

It really has been a tremendous stretch of winter, here. I'm over 50" on the season...only 8" from last year's total which I thought wouldn't be reached for a while. In the past 13 months I'm near 110" of snow. The numbers are staggering.

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I had to give the MA a good go for once. thumbsupsmileyanim.gif

You guys are lucky--the boredom continues out here and the EC gets storm after storm. Snowman.gif

i remember over a week ago "hoffman" was the lead member down there for this storm. Great call for him, pretty amazing..Im happy DC is finally gonna get to rock

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I'm still convinced the NAM is adjusting. The RUC is way northwest--which is a great sign. The NAM expanded the vertical velocities dramatically but didn't totally get the QPF there yet. Regardless..that's a huge band sitting from PHL to pretty much Staten Island..and serious ripping underneath it.

This is why I'm still calling for 8-14" here in Westchester. The NAM shows a serious deformation band over Monmouth County, which should advance northeast given the closing off of the H5 and H7 lows. I think the models are still adjusting to this system being further NW than originally progged, as were the last few storms, so I don't think the trends are over with regards to increasing QPF for NYC metro. The radar also looks totally different from what the 0z GFS and 06z NAM forecast; the models show the banding over Northern Virginia stalling and dying out, but that's clearly not happening...extremely heavy echoes are moving into Southern NJ as we speak. I think we'll pick up a few inches from that banding, and then plenty more tomorrow afternoon and evening as the H5 closed low moves SE of NYC. I'm still very bullish on this storm and don't believe 12" totals are out of question. This is a Miller A Gulf Low with very heavy precipitation.

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Yes...psuhoffman for the win.

tumblr_ld7n7kB6mr1qar70f.gif

yeah and HM on these boards mentioned earlier in january that in late january DC will get in on the fun...I hope i can predict like that someday

catch up with you guys later, should be a very fun day, and a snowy one at that. :snowman:

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The H5 shortwave closing off is still big here. It's been mentioned for a few days but hasn't been given much notice...the runs are either east, west, bad, good. But there are reasons for this. The atmosphere adjusts dramatically with small changes. The 00z run had the H5 low open the entire time it passed our latitude. This run closes it off at H5, H7, H85 in similar areas. The upward vertical velocities are more expansive..the precipitation rates can expand further to the northwest and the cold conveyor belt can mature.

f24.gif

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i remember over a week ago "hoffman" was the lead member down there for this storm. Great call for him, pretty amazing..Im happy DC is finally gonna get to rock

It is funny because this whole scenario regarding a storm threat began as a potential "overunning" event with a couple inches as the models tried to hold onto that arctic high and send a weak wave NE with a weak flow of mid level moisture over the top. Ji went all over that and named it the "PSUHoffman Storm" since PSUHoffman was the one talking it up. Since then the entire premise of the threat has changed--but it still has his signature on it even though he never asked for it, haha. Either way this reminds me a little of the Christmas bomb since it has been all over the map in terms of solutions from a CMC inland Apps Runner rainstorm to a GFS style Miller B OTS junk-pile. It has been interesting to watch. Making it more interesting is my friend out at LWX NWS and talking with her about it.

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