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Election week coastal storm threat


Midlo Snow Maker

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LOL and then we you are up here, you'll be saying that about the MA.

This will be a strong storm everywhere. Certainly DC burbs into ERN PA are under the gun for a 6-10hr pasting.

Always nice to see you pop in and say things like this.

What time frame are you thinking for the 6-10hr period?

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Thanks for these side-by-sides, Bob. Very helpful. I hate clicking back and forth between browser windows/tabs. I agree it's a fairly big step. I admit to not paying very close attention to this storm yet (November snowfall suspicion bias), but hasn't the GFS been bouncing around a bit for the last few days between OTS and something close enough for precip in our area? Either way, a change at this stage in the game, ~72 hours out when the vort is being well-sampled, should be given more weight then one 3 days ago.

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I just did side by side h5's @ hr 45 & 51 and compared with hr 51/57 with 6z. It's a huge step. I think I'm caving on this one. I've tried to fight the urge because it's so damn time consuming picking apart every run but the GFS just pushed me over the edge.

[

you're not fighting this as much as you fought that lil b**ch Sandy, you must be wore out! weight_lift.gif

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Thanks for these side-by-sides, Bob. Very helpful. I hate clicking back and forth between browser windows/tabs. I agree it's a fairly big step. I admit to not paying very close attention to this storm yet (November snowfall suspicion bias), but hasn't the GFS been bouncing around a bit for the last few days between OTS and something close enough for precip in our area? Either way, a change at this stage in the game, ~72 hours out when the vort is being well-sampled, should be given more weight then one 3 days ago.

No prob. I'm really efficient at it and it really helps seeing them right next to each other instead of trying to toggle. I'm going to add 0z to the side by side and post shortly.

The nam is doing the same thing so I don't think this move is just a "bounce". It could be but thinking about how steadfast the euro has been and now other important guidance has made a clear shift combined with how short of a lead we're at really brings some optimism. At least for me it does but I'm always biased and since I'm a weenie it doesn't matter what I think. lol.

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Valid to be concerned about the Euro overamping. It's done so at least a handful of times in recent winters. However all the globals have a big storm for the most part. GFS is so often east in this range it's hard to say its any more right than the Euro. IMO you should weight the Euro/ens at the point where we currently sit.

I only have free access to the Euro's ensemble members, so while I can see that the OP and mean are in agreement I can't see what they look like between 12Z and 0Z on Wednesday when the mean ends up further a good bit further east and weaker than the OP. In fact, the 0Z Euro mean looks pretty similar to the 6Z GFS mean at 0Z Thursday:

00zgfsensemble850mbTSLPUS072.gif

00zecmwfens850mbTSLPUS072.gif

The GFS members show a decent amount of spread, though. So much so that eight of the members are basically duds for us, two are great/decent...and two are Eh...

I wonder if the EC members are similarly spread thus resulting borderline okay mean solution that doesn't actually represent the opinions of any of the individual members?

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I just did side by side h5's @ hr 45 & 51 and compared with hr 51/57 with 6z. It's a huge step. I think I'm caving on this one. I've tried to fight the urge because it's so damn time consuming picking apart every run but the GFS just pushed me over the edge.

Bob, thanks for posting those. Pretty big differences to my unknowing eyes. I may be starting to fade myself. I've never bought this one. I'd sure like to see it happen though.

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If anything 0z was onto closing h5 before the 6z went the other way. If you compare 0z to 12z it's a more natural progression towards the desired solution. The GFS really wants to wrap this thing up earlier than yesterday's runs. That's the most significant takeaway for me. The euro has just been steady freddie at closing up h5 perfectly to our south and putting us into the hot and heavy deform stuff.

A good analogy of what we want to happen is the cyclone hitting it's adolescent growth spurt over our heads before it becomes mature and flabby.

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Always nice to see you pop in and say things like this.

What time frame are you thinking for the 6-10hr period?

Well maybe late Wed aftn into Wed night. Just remember it's all about placement in this band. It's not going to be something where all QPF will be snow, it will probably only snow where the strongest echoes lie. Big bust potential and have fun figuring that out..lol. All you can say right now, is the potential is there for some snow in the DC area..especially spots higher up...and on into NW NJ/ERN NY.

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Well maybe late Wed aftn into Wed night. Just remember it's all about placement in this band. It's not going to be something where all QPF will be snow, it will probably only snow where the strongest echoes lie. Big bust potential and have fun figuring that out..lol. All you can say right now, is the potential is there for some snow in the DC area..especially spots higher up...and on into NW NJ/ERN NY.

Excellent. Thank you.

Yea, I totally understand about location. Unfortunately for me, my house is usually frustrating close but 20 miles to my NW is cashing in. I wouldn't expect this to be any different if it does snow. I'll get lucky with an inch or 2 as it pulls away. But heck, 2" is damn close to my seasonal total last year.

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Well maybe late Wed aftn into Wed night. Just remember it's all about placement in this band. It's not going to be something where all QPF will be snow, it will probably only snow where the strongest echoes lie. Big bust potential and have fun figuring that out..lol. All you can say right now, is the potential is there for some snow in the DC area..especially spots higher up...and on into NW NJ/ERN NY.

Sorry but i just wanted to highlight the important parts before everyone says all snow.

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Don't do this to me. Remember that time I bailed you out of that foxhole in 'Nam?

Well don't confuse "potential" with "locked" lol. It's still quite possible the DC area is on the wrn precip fringe. This is not an easy task to figure out. Trying to narrow down a band that might have a 30-50 mile wide swath of snow that depends on dynamics in a marginal atmosphere is difficult at best. It would be wise to keep expectations in check for now, but it certainly is on the table. If the euro hangs tough, then I would feel better, but I'm unsure how far west the precip makes it.

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Sorry but i just wanted to highlight the important parts before everyone says all snow.

So you think. This is all anyone read:

Well maybe late Wed aftn into Wed night. Just remember it's all about placement in this band. It's not going to be something where all QPF will be snow, it will probably only snow where the strongest echoes lie. Big bust potential and have fun figuring that out..lol. All you can say right now, is the potential is there for some snow in the DC area..especially spots higher up...and on into NW NJ/ERN NY.

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I wouldn't even focus heavily on elevation partly since those areas might not get into heavy precip. Obviously elevation helps when available but a euro solution would give just about anyone snow who gets the comma head. Anyone who has lived here a while knows how to be skeptical.

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