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Jan 31st - 33rd Storm Obs and Disco like it's 1979


Bob Chill
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6 minutes ago, frd said:

Is it even conceivable the NAM can out forecast a blend of superior models and ensembles at this juncture ?

 

It would be a major coup, but I think the NAM may be having issues with the transfer idea. I will say, despite the NAM Nest looking better than the parent, it's still well short of every other guidance. Hopefully it's too rambunctious on the dry air intrusion within the mid-levels and it moistens up towards game time. It was paltry otherwise. Even the 85H wind field sucked for boundary layer moisture penetration further inland. Certainly on an island, but it can be a hint on things other guidance might miss. I'd hold off giving it too much weight beyond the WAA piece. 

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7 minutes ago, MillvilleWx said:

Not saying much. If the NAM is remotely right, it will be a pretty large fail with the rest of numerical guidance. Hopefully it's not on to something for everyone's sake. It's pretty crap until almost the PA turnpike 

     I liked the 850 wind axis a good deal more in the nest, and there is more precip later Monday in our area than in the parent, but there is certainly no argument that even this run didn't get it done for our area.

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2 minutes ago, high risk said:

     I liked the 850 wind axis a good deal more in the nest, and there is more precip later Monday in our area than in the parent, but there is certainly no argument that even this run didn't get it done for our area.

That's exactly what I mentioned to @frd above. It was certainly better than the parent, but man oh man, that looked ugly. There wasn't even anything resembling a pure deformation axis anywhere except maybe coastal NJ. It was weak sauce. That would be brutal for NWS offices in the NE, especially Mount Holly and CTP

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9 minutes ago, Hypothetical 240 hour snow said:

The NAM unfortunately was a big harbringer with the Dec storm, so it could be right about the dry slot placement. Fortunately the WAA portion of the event looks pretty good... QPF is usually a bit overdone in those since it starts as virga and the models don't quite pick up on the lack of BL moisture (and the fact the column will generally saturate more gradually in isentropic ascent), but still I think 3-5 (my initial guess) might be conservative and we could be looking at 4-6 from that. Unfortunately with that dry slot and NEwrd displacement of the CCB we would be lucky to pick another 1-2 in showers after that. But if I can get 5-7 event total, with limited melting/compaction that is a big win given recent history.

Wow, look at you. You started off rocky, but been making some good posts lately.    This is actually reasonable and I agree.  

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16 minutes ago, Ji said:

wow we all waited days to get in NAM range to get NAM'D.....and looked what happens

How long have you been at this to not know round 2 is not in NAMs wheelhouse at all Ji lol. 
 

Relax young Jedi. 0z tonight is much more important for the NAM

 

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Just now, psuhoffman said:

18z rgem held, no crazy dryslot and deforms the hell out of us. Obviously I don’t know if it will show the same insane stupid 3”+ qpf but from this we take!

C870B2DC-010E-4F5C-AF43-E9F396062FFE.thumb.png.637fc752033b2657d73d25a06e73614b.png

we got Named by the RGEM but does this model have wild swings typically within 48?

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1 hour ago, Maestrobjwa said:

@Bob Chill I'm actually don't 100% know the most likely outcome for my yard...lol I mean I'm assuming I'm in a pretty decent spot for the CCB...maybe being right on the fringe of said plastering, perhaps? Has the bay ever played a role in the moisture for this kind of 

I told you exactly what to expect last night. You wont do as well with pt 1 as those south of you and you have a better chance for pt 2 than everyone south of you. There's way too much uncertainty to discuss anything specific with pt 2. The range there for your yard is like 0-15" with the odds of the lower end being higher than the top end. But even if models dont specifically show a big pt 2, if your still in the envelope then you can't write off a big upside surprise. You could get under a fgen band and get 6" in less than 3 hours. Or someone 20 miles to your west gets than and you get 1-2". Just let it happen and dont seek specifics that can be given with any confidence. 

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Just now, psuhoffman said:

18z rgem held, no crazy dryslot and deforms the hell out of us. Obviously I don’t know if it will show the same insane stupid 3”+ qpf but from this we take!

C870B2DC-010E-4F5C-AF43-E9F396062FFE.thumb.png.637fc752033b2657d73d25a06e73614b.png

Looks like about 1.75-2.25 for most of us from the naked eye. Can’t wait to see accumulated precip

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7 minutes ago, psuhoffman said:

18z rgem held, no crazy dryslot and deforms the hell out of us. Obviously I don’t know if it will show the same insane stupid 3”+ qpf but from this we take!

C870B2DC-010E-4F5C-AF43-E9F396062FFE.thumb.png.637fc752033b2657d73d25a06e73614b.png

Man, that's an exciting panel. These kinds of outcomes happen sometimes so it's believable. Sometimes models crush people but under the hood doesnt resemble how it really works. Rgem just tossed out back to back perfect scenarios for our region. Hard to not like that but again.... mesos prob aren't the most skilled this far out in time with a major dynamic storm 

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Wouldn’t trust the NAM until tomorrow. It’ll look all goofy and then a random 6z run it gets its act together. Happens all the time with this pos.  All I do is use it literally as the storm is happening to get last second adjustments. Even then it sucks. The last December storm I chased I changed motel reservations because THE 12z NAM literally 3 hours before the first flakes shifted south and the max ended up going N of me.. I’d literally bet a cool g to anyone on this

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