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Late January 2013 mid-long range disco thread


Midlo Snow Maker

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I think the models at this range will try to push out the cold air too quickly. Thats going to be tough to do east of the mountains. I also think its going to be hard for that low to make it as far north as they have it currently.

The NAM and SREFS seem to like us getting a little snow tomorrow. Maybe we get lucky on that one a bit.

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it is worth watching...i imagine it could trend south...but no reason to get caught up now...or even 48 hrs out....i'll wait until we are on the brink....euro solution seems perfectly reasonable to me with the caveat that I do think it will be a closer call  on the front end....

 

I pretty much agree and note that the majority of ens members of GEFS are now to our north.  The lack of any clear blocking suggests an OH valley solution before reformation to the east of the mountains.  That probably screws us though we could have a period of snow and then freezing rain before changing over but it also doesn't look like a super wet system for us.  Still it's too early to write it off completely.  The back end is also worth watching though they never seem to work any more around here if they ever did. 

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There is a threat still, and doesn't the Euro have a second, trailing low forming off the NC coast? Verbatim it looks like some precip for parts of VA and Delmarva. Something to watch for in future runs. GFS has had this sort of depiction as well on several runs. Seems like there are going to be 2 lows, but much to be resolved with the current spread. I also don't believe an arctic air mass is going to be so quick to retreat as the Euro implies with the first(northern) low.

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What happens with that system that pops off the ne coast has the ability to help us. Some guidance takes it all the way down to the mid 950's between the maritimes and greenland. Just too far north to act as a 50/50 but it can still help lock cold air in and protect a front end thump of snow for us. 

 

I was surprised that the euro took the system south yesterday and unfortunately wasn't surprised that it quickly changed it's mind. I won't buy into any second wave scenario until it's on top of us. Overall it's looking to remain a messy setup but can still drop some accum snow in the cities. Gotta crawl before you can walk. 

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Bob, it looks like we have two chances at flurries or snow showers this week prior to the stronger system.  The 1st Monday afternoon looks like we might have a rain to snow shower/flurry  with the front.trough coming through.  It has little chance of producing any accumulations except where elevation might help.  Then we have another Wednesday night which the NAm now trying to bring a clipper towards us.  It will be interesting to see what the GSF does with that feature. The stronger it is, I think the better it would be for our chances of getting any front end snow with the Friday system. 

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Looking at last nights runs, I dont believe at the end of the day we're going to see a strong primary going into the lakes and turning us over to rain. I've lived here long enough to see this scenario play out.  2007 had a couple good examples.

1) With the airmass in place this week (DPs will probably be in the low/mid teens on Thursday,) there's going to be a very solid in-situ wedge down the apps.  The low is ony going to get so far up in latitude then jump to the coast at some point.

2) It's possible the primary does get up into SW PA depending on how strong the HP to our N actually is, and with the 700MB low to the NW, we have a warm nose up there at 750-800 MB.  In that case its a matter of how much falls as snow vs. sleet/zr for those of us west of 95.

3) I don't think it will get out of the 20's on Friday for those west of 95.

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I don't know about the great lakes but think the primary low is more likely to track into the oh valley than go to our south with makes the forecast really tricky since we will start out with cold air.  The Euro and GFS are obviously having problems with the pattern even when looking at the ens mean. 

 

That said,  the CPC superens mean D+8 would favor a track to our north. That does not mean the western guys out in Leesburg couldn't get a few inches of snow it things went right but makes it tough for us eastern guys to get an extended period of snow unless the low stays weak and then it probably would not have that much precip with it. 

 

post-70-0-66726900-1358696488_thumb.gif

 

 

 

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Might be a good time to get the ice scraper tuned up just in case. 12z surface on Fri:

 

attachicon.gif12zgfsice.JPG

 

We'd probably start as snow but as progged it is not a very wet system since it really never gets enough amplitude to really tap deep moisture from the gulf.  That means most of heavier precip will probably be on the north side of the low with the warm advection/isenttopic lift and them some showers with the trailing cold front.  If it were a wetter system it would be interesting. 

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I'll let the others have fun with this one and wait until later in the week to see about front end details...a back end low seems kind of improbable

 

The back end stuff rarely works and the GFS now has the scenario that looks more real for the back end.  We need to have the system be wetter than it is on this run or our front end is going to be pretty wimpy. 

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I'll let the others have fun with this one and wait until later in the week to see about front end details...a back end low seems kind of improbable

Only thing to really watch is maybe it can speed up a bit and juice up better south of the surface low as it approaches. There is an ok are of waa precip breaking out in the middle of the country in advance of the sw. Maybe it gets organized better. Who knows. I suppose we can continue to wish it south. It's not too late for that yet but we need an awful lot of help to the north.

Trailing low prob wouldn't do much anyways. Not a good axis and no signs of that changing. Any wave would scoot unless something closes off. Highly unlikely.

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The back end stuff rarely works and the GFS now has the scenario that looks more real for the back end. We need to have the system be wetter than it is on this run or our front end is going to be pretty wimpy.

Some people are comparing this to 12/26, your thoughts? I feel like in a way it is similar, the front end overperformed for many, especially around Baltimore where I got 1.5 se of town. This situation has a different set up at h5 and a better antecedent airmass. You'd like to think that a similar thump would be there, only problem is we dont have a sub 998 working its way up, its a west east mover at 1000+. We need that low to deepen as you said, because there could be some cad and I could see a finger of HP working in between our clipper bombing off the MA and this system.

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The back end stuff rarely works and the GFS now has the scenario that looks more real for the back end.  We need to have the system be wetter than it is on this run or our front end is going to be pretty wimpy. 

When I saw the hour 114 panel I thought there might be enough room for a decent secondary to come closer but I guess it was wishful thinking. I am wrong in thinking the further north the first low gets the better chance for a back end low.

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Some people are comparing this to 12/26, your thoughts? I feel like in a way it is similar, the front end overperformed for many, especially around Baltimore where I got 1.5 se of town. This situation has a different set up at h5 and a better antecedent airmass. You'd like to think that a similar thump would be there, only problem is we dont have a sub 998 working its way up, its a west east mover at 1000+. We need that low to deepen as you said, because there could be some cad and I could see a finger of HP working in between our clipper bombing off the MA and this system.

I'm concerned with how dry it looks. I guess will have to see how the disturbanc/clipper on Wednesday helps this play out.

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Anyone notice that this run is about 300 miles faster?

It looks like the energy responsible for this is still well out over the Pacific. I don't have any idea how that area ranks on the data collection scale, but with as much variability just shown, I'd think we are still a bit away from clarity.

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Some people are comparing this to 12/26, your thoughts? I feel like in a way it is similar, the front end overperformed for many, especially around Baltimore where I got 1.5 se of town. This situation has a different set up at h5 and a better antecedent airmass. You'd like to think that a similar thump would be there, only problem is we dont have a sub 998 working its way up, its a west east mover at 1000+. We need that low to deepen as you said, because there could be some cad and I could see a finger of HP working in between our clipper bombing off the MA and this system.

 

Much weaker storm on the GFS. But as usual I believe the CAD will be under done on the models. Hopefully the storm will be stronger than modeled.

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To me it is nice not to have a locked in snow solution only to have the football pulled away. It may end up being fun to track once the models catch on to the depth of the air mass. I am fine with a frozen to rain solution.

I agree about it not being a locked in snow solution just yet....my post about being weary of long track events is just that...more painful to lose it close to the event vs. it never showing or surprising late

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