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Jan 31 - Feb 1 Event - STORM MODE THREAD


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Just now, clskinsfan said:

Depends where you live. I certainly dont like the trend at 0Z for my area. But up where you are you should be pretty happy. I had pretty low expectations for my area anyways. We always get screwed in Miller B's. ALWAYS. I was hoping to snag 6 inches with the waa. But that has trended down tonight as well. 

Alright I'm confused here...we're seeing more favorable trends with the coastal/CCB, right? Now, is there some kind of inverse relationship with the WAA for areas like yours? (Apologies...just trying to visualize the scenarios here)

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1 minute ago, blueberryfaygo said:

what worries me is I keep seeing that southern NJ jackpot... back in December a storm pivoted over the NE like this one.. and some people saw all time records.. the way this thing tucks and pivots tells me that their is going to be a isolated max potential area.

You are new, and welcome to the board, but storm mode is really not supposed to be for IMBY questions. Hit banter for that. We in Baltimore always have plenty to worry about, but that CMC run was not one of them. Who cares if southern NJ jacks if we have 15-20. Let's be real. 

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Just now, Maestrobjwa said:

Alright I'm confused here...we're seeing more favorable trends with the coastal/CCB, right? Now, is there some kind of inverse relationship with the WAA for areas like yours? (Apologies...just trying to visualize the scenarios here)

WAA too weak and not as robust on early totals and coastal develops too late so no backside. His worry is the fail worry for any of us in a MillerB.  Magnified where he is because backside in a Miller B is harder to catch out that way.  

 

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1 minute ago, North Balti Zen said:

WAA too weak and not as robust on early totals and coastal develops too late so no backside. His worry is the fail worry for any of us in a MillerB.  Magnified where he is because backside in a Miller B is harder to catch out that way.  

 

Okay, I understand that...but what I'm saying is, does a weaker WAA mean an earlier coastal? Or are they not connected like that?

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Just now, Maestrobjwa said:

Okay, I understand that...but what I'm saying is, does a weaker WAA mean an earlier coastal? Or are they not connected like that?

It can. And probably you should take this to banter. A weaker front end and a sloppy late transfer is a thing. Then the storm blows up north of our latitude. Cross your fingers, other than the NAM twins, nothing else really showing that. 

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1 minute ago, North Balti Zen said:

It can. And probably you should take this to banter. A weaker front end and a sloppy late transfer is a thing. Then the storm blows up north of our latitude. Cross your fingers, other than the NAM twins, nothing else really showing that. 

It’s alright if it’s here. This is good discussion between runs

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12 minutes ago, Maestrobjwa said:

Alright I'm confused here...we're seeing more favorable trends with the coastal/CCB, right? Now, is there some kind of inverse relationship with the WAA for areas like yours? (Apologies...just trying to visualize the scenarios here)

Your backyard is seeing favorable trends with the coastal.  DC/NOVA isn’t, at least with the 00z suite so far except the CMC which just got NOVA into the coastal.  

The initial slug of moisture from the WAA going south isn’t necessarily indicative of the coastal deepening in a great location for NOVA on north...they are two separate things.  

That is more dependent on the orientation of the trough, strength of 500 low, etc. At least I think.

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39 minutes ago, Maestrobjwa said:

So...are you saying that we can benefit from even more relaxation of that vort over NE? So in a way it's like the opposite...suppression issues show up as "north" and not south? In other words, a further relaxation of that vort would produce a more of a "south"--in a good way--solution?

*head spinning*

It sounds counter intuitive but it’s a complicated setup. The suppressive flow is relaxing. As it does eventually the coastal storm will amplify, phase and get captured. Once that it will stall and tuck and where that happens to the NW is where the heavy snow will develop. Illustrated below by the ggem. 
E5A60B00-840A-425E-B170-43E397294755.thumb.jpeg.78273d88f15b862e8b7ff372402e25b6.jpeg

the capture/tuck was perfect there for DC northeast.  The heavy snow is banding in the deformation axis where there is the convergence of winds and sheer at different levels. Look at how the winds ahead of the h5 h85 and surface levels all converge on that zone. Additionally you have moisture transport into that zone from the east. So you add moisture, instability and lift from convergence and that death band is what you get!  
 

But one issue on some guidance is the h5 opens up as it presses up against the shear from that suppression and because of that the transfer process is delayed and so the low doesn’t phase and capture until further northeast up the coast?

I give you the NAM

0E300A43-53B1-424C-A8BD-D2C50C860C47.thumb.jpeg.dd7484fb68764e32a553eb821ce3fabf.jpeg

same scenario but the low is further northeast at the same time AND it never really got its act together and synced at at all levels like the rgem/ggem did.  The result is the ensuing snow bands set up north. But yes suppression had a part in that.  It’s delicate though. The suppression is easing. If it eased too soon the primary could hang on too long. If it suppressed initially we lose some of the WAA wave then the coastal front could be further southeast and the secondary will develop further ots. It’s a tricky balance. Miller Bs are a pain in the a$$ compared to muller As to pin down. If this was a juiced up gulf low we probably would have a better idea how it’s going to go by now. But guidance has a notoriously difficult time with transfers and phases. I’ll never forget how EVERY model was giving be a 6-10” snow from the CCB in early March 2018 only about 12 hours out and then the whole thing shifted northeast and I didn’t get a flake from the coastal. On the other hand a similar storm in Feb 1996 was supposed to hit NJ and crushed DC with no warning.   I never count on a ccb from a miller b secondary until it’s snowing from it. 

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12 minutes ago, Hypothetical 240 hour snow said:

UKMET a big outlier at this point... likely can be thrown out.

In addition to the consensus you said that was against the CMC (which I guess is good now?), now the UKMET is bad?  Tell us why it can likely be thrown out, in your expert opinion.

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3 minutes ago, mattskiva said:

Ukmet, CMC, and wxrisk clown maps should be banned in storm mode as fake news. Let's focus on the adult models...

The large discrepancy between all the models is indicative of how uncertain things are. Pattern is fragile with a lot of moving parts, any one of them could be on to something as we do not know what the outcome will be. How ever the model initializes the moving parts is the eventual outcome. Complexity of a Miller B. From climo, they are usually not too favorable for the Mid Atlantic, more so the Northeast and we are seeing those trends. Fact is, the 500 trough and upper low are not all that impressive until later in the game. 

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22 minutes ago, Maestrobjwa said:

Okay, I understand that...but what I'm saying is, does a weaker WAA mean an earlier coastal? Or are they not connected like that?

Dont worry yourself to death and get caught between IMBY'ism. It's game time. We all only care about our yards. I'm honest about it. Some like to wish everybody gets the same amount but that's not how this game works. You'll see all kinds of different "takes" on each run because people are only focusing on about 30 pixels of the entire digital map

Know your climo. NS hybrids rarely jack anyone north of the potomac with part #1. I always expect to be in the middle unless there's ptype problems. Your area is lower and sw in VA is higher. It's how it works basically always.

 These storms also rarely jack my yard with part 2. NOVA fears part 2 for good reasons. Climo favors N-NE MD. I usually get some decent snow but again, fall in the middle. Your yard is typically higher and part 2 has higher ratios due to cold column and upper level support. This helps juice accums for the lucky ones. 

Models struggle dearly with part 2 because a ton of sh!t has to happen first before part 2 gets going. As leads shorten, more and more of the important things are resolved and out of the way. We're close to that part but were still talking Monday, not Sunday. We won't know for sure how part 2 breaks until snow is already falling. Even then we wont know because storms like this have a long standing habit of doing unexpected things. I personally dgaf what models show tonight or even tomorrow night for part 2 as long as my yard is still generally in the game for something decent. 

Lastly there's the WD and WND indexes to consider. In 2016 my yard got absolutely raked in the deform bands. I was right on the line but got smoked. For that reason alone I don't expect to be in the jackpot zone in either part but I am expecting a very fun, long duration, instant stickage, multi faceted storm. These are rare and amazing. If you get a foot and it bugs you that somewhere relatively close gets 18", you'll never have fun doing this 

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