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Central PA & the fringes - January 2015 Part II


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Oh, and just to throw it out there...measured about 2" today and have about 6-7" OTG.

 

That's pretty much what I have. On a side note, it looks to me like the precip shield is really consolidating into a nice band of moderate snow out to the west of the Susquehanna. I almost looks like a large deformation band out that way.

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Some of the best rates and flakes of the day occurring here currently with the nice little flare up on radar in the central counties. 

 

That is what we had all day. Every time it looked like things would dissipate, a new band would pop up.

 

What are your thoughts on what is going on out east...to my untrained eye things do not look good for NYC right now.

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DT insisting that NAM/Euro had this lull in the precip for NYC and that it will pick up after 11. As much as it stinks that we got the Miller B shaft, it's fascinating to watch this play out.

 

24 degrees and light snow in Lemoyne. Of course I shoveled this afternoon thinking it was over and now everything is covered again.

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DT insisting that NAM/Euro had this lull in the precip for NYC and that it will pick up after 11. As much as it stinks that we got the Miller B shaft, it's fascinating to watch this play out.

 

24 degrees and light snow in Lemoyne. Of course I shoveled this afternoon thinking it was over and now everything is covered again.

 

Not really. The NAM and Euro never really picked up correctly on that small band that set up right over NYC and gave them 5 inches. If you look at the 18z NAM, by this point the sim radar already had good returns well into NJ.....not even close to the case as to what is going on right now.

 

http://mag.ncep.noaa.gov/Image.php?fhr=006ℑ=data%2Fnam%2F18%2Fnam_namer_006_sim_radar.gif&model=nam&area=namer&param=sim_radar&group=Model+Guidance&preselected_formatted_cycle_date=20150126+18+UTC&imageSize=M&ps=model

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MAG is that band going to die out or pivot back east?

 

HRRR and RAP seem to keep this precip generally anchored where it is and slowly dissipate as the evening wears on, so we will see. Actual radar representation looks a bit healthier than on those models, so it may eventually meander back east. We're almost to the point where the coastal will have completely taken over and the deform shield will be the only game in town (or out of town for us) in terms of meaningful precip. 

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That is what we had all day. Every time it looked like things would dissipate, a new band would pop up.

 

What are your thoughts on what is going on out east...to my untrained eye things do not look good for NYC right now.

 

Well certainly the short term high resolution models are looming large attm. One of the mets in there made a great point about the HRRR not doing as well over water because it only initializes and modeled off of what the radars are seeing, and when the whole thing is out over water, your not getting as good of a depiction and thus it doesn't model the westward extent well. With that said, I expected a more marked westward correction as the evening wore on than has happened, and both the HRRR and RAP have in fact remained pretty steadfast. The RAP still gets the precip shield into NYC fairly decently, which is something that looks like should occur based on radar trends. As I said earlier this evening, I'd be more worried in Philly and NJ (esp interior). 

 

I still think NYC will get hit decently (and has already gotten some decent totals from some rogue bands), but it seems apparent to me that the excessive amounts could stay from about central LI outward and upward into southern New England. When I say decently I think they'll end up with a foot or so..with the associated wind impacts. The jury's still out west and southwest of that though in NJ/Philly, IMO...which I've considered as an area that would be tough to call the last day or so. Considering the snow numbers that are put out for this storm (Philly region and essentially all of Jersey 10+ and half of NJ in 18+) the bust potential is monumental. I decided on putting Philly and extreme eastern PA along the Delaware River for 7-10" in the snow map I put out yesterday for PA, and I consider that in jeopardy of verifying attm. 

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Well certainly the short term high resolution models are looming large attm. One of the mets in there made a great point about the HRRR not doing as well over water because it only initializes and modeled off of what the radars are seeing, and when the whole thing is out over water, your not getting as good of a depiction and thus it doesn't model the westward extent well. With that said, I expected a more marked westward correction as the evening wore on than has happened, and both the HRRR and RAP have in fact remained pretty steadfast. The RAP still gets the precip shield into NYC fairly decently, which is something that looks like should occur based on radar trends. As I said earlier this evening, I'd be more worried in Philly and NJ (esp interior). 

 

I still think NYC will get hit decently (and has already gotten some decent totals from some rogue bands), but it seems apparent to me that the excessive amounts could stay from about central LI outward and upward into southern New England. When I say decently I think they'll end up with a foot or so..with the associated wind impacts. The jury's still out west and southwest of that though in NJ/Philly, IMO...which I've considered as an area that would be tough to call the last day or so. Considering the snow numbers that are put out for this storm (Philly region and essentially all of Jersey 10+ and half of NJ in 18+) the bust potential is monumental. I decided on putting Philly and extreme eastern PA along the Delaware River for 7-10" in the snow map I put out yesterday for PA, and I consider that in jeopardy of verifying attm. 

 Well, the NAM just came out, as I'm sure you see, and instead of 2-3 feet, NYC gets 5-8 inches. 

 

Had to be a tough forecast, but this has to be one of the biggest busts, if it holds, the euro has had.

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Speaking of my map, here it is for posterity sakes. I'm fairly happy with it overall.. I'm glad I lowered the Sus Valley. SW PA might've been a bit high. Seemed like it did OK but haven't really scrutinized the PNS totals yet with the event still ongoing. Obviously as I just said, I think far eastern PA is in trouble attm. 

 

post-1507-0-10406100-1422324488_thumb.pn

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Speaking of my map, here it is for posterity sakes. I'm fairly happy with it overall.. I'm glad I lowered the Sus Valley. SW PA might've been a bit high. Seemed like it did OK but haven't really scrutinized the PNS totals yet with the event still ongoing. Obviously as I just said, I think far eastern PA is in trouble attm. 

 

attachicon.gifpost-1507-0-55541400-1422250921.png

 

Actually, SWPA you might have been a bit low. The highest report in Allegheny County was at the NWS office in Moon and 7.5 inches, so my guess is that there was 6-9 across the county. Beaver, Butler, and Westmoreland did fairly well too. You were really close though, and not many others had even more than 6 here.

 

Far SWPA there were major issues with mixing.

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Speaking of my map, here it is for posterity sakes. I'm fairly happy with it overall.. I'm glad I lowered the Sus Valley. SW PA might've been a bit high. Seemed like it did OK but haven't really scrutinized the PNS totals yet with the event still ongoing. Obviously as I just said, I think far eastern PA is in trouble attm. 

 

attachicon.gifpost-1507-0-55541400-1422250921.png

nice job....i know youre still concentrating on this storm but any preliminary thoughts on thurs and sunday?

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