Complex storm system before another cold air mass...

By: Zachary Labe , 12:34 AM GMT on December 12, 2010

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"Afternoon Thoughts" (Updated 12/11)
Excuse my absence this past week; it was quite a stressful week waiting for my decision in combination with our high school choir being chosen to sing for the Governor at the Harrisburg state capitol tree lighting. It is hard to believe my dreams of attending Cornell University are now a complete reality. While I found out online in a private Cornell account, my letter arrived in the mail today. I always prefer things in hard copy, so it was relieving to see the acceptance letter. While I feel accomplished and proud, I also feel lucky. There are thousands of applicants who also had just as high statistics (GPA/SAT/Class Rank) as me if not higher. Cornell was certainly a reach school for me, but I felt my unusual accomplishments in connection with my passion for meteorology set my application apart. I am a member of the Cornell college of Agriculture and Life Science class of 2015. Interestingly enough this class is also the sesquicentennial class (150 years). Anxiously I await the myriad of opportunities Cornell University will offer me. Initially I was expecting a rejection. For applying to an Ivy League school is more or less a lottery. Everyone applying is very capable and essentially on the same level with select few setting themselves apart. At 5pm eastern, early decision applicants were able to check their application decisions through a private account with a username and password. I was so nervous through much of Thursday, barely accomplishing a test and leaving yearbook afterschool a bit earlier than normal. A quick nap after school led to a few minutes before 5pm. As I reached for the mouse shaking to the point of not being able to click the button, relief came rushing in with a flood of unexplainable emotion. While I believe I would have been happy at any college I attended, this is a certain element of accomplishing my dream/reach school. My official major is Atmospheric Science. Thank you for all for support of my blog as I believe this certainly played a role in my application. Have a great day!

"Current Surface Plot"

(Courtesy of HPC)

"Regional Radar"

(Courtesy of Wunderground)

"Regional Advisories"

(Courtesy of NOAA)

"Forecast Discussion"(Pennsylvania, Maryland, Delaware)(Updated 12/11)
An upper level gathering strength over the Ohio Valley will continue to track northeast across western Pennsylvania up through western New York State. 850mb heights will rise well above 0C for the entire Pennsylvania, Maryland, and Delaware region. A dominate southeast flow off the Atlantic ocean will also promote boundary layer temperatures rising well above freezing for all locations with very little cold air damming courtesy of the lack of anticyclone to the north. But a bit of break in the cloud deck ahead of the precipitation will allow temperatures to drop to freezing or slightly below by late Saturday night, especially north of the Pennsylvania turnpike. As precipitation moves in from the western and south, a bit of freezing rain is possibly. Penndot road temperatures indicate most roads well below freezing, so travel may be tricky early Sunday morning before dawn across the I-80 corridor. But eventually temperatures will rise above freezing for all areas ending the threat. Highs on Sunday will be in the 40s for all areas and possibly near 50F across Delaware and southern Maryland. Less than a tenth of an inch of freezing rain is likely for all areas. The low pressure off the Virginia coast will not have too much of an effect on our precipitation, but some light spotty drizzle may move into southern Pennsylvania also Saturday night with a bit of freezing rain before the marine layer moves west with warming temperatures. As the double barrel low closes in on the area with an accompanied cold front, PWATs will rise to near +1SD with heavy rain overspreading the region. For most of Sunday the precipitation will be predominately rain with QPF totals near 1in or slightly less for much of the area. As the cold front moves west H85 thermals will drop to near 0C along a line moving west to east by Sunday evening. Temperatures will rapidly fall along and behind the front changing precipitation from rain to snow especially for western Maryland and western Pennsylvania. There will not be too much precipitation behind the initial front, but the primary upper level low will begin to intensify as it moves into northern New England. High resolution guidance suggests a weak deformation band as far south as Pennsylvania with some light 1-3in synoptic snow accumulations especially for western Pennsylvania, but also parts of central and northeastern Pennsylvania.

By early Monday morning drier air will flood the region with an area of subsidence. But quickly winds will increase out of the northwest cranking up the lake effect snow machine. Moderate to heavy snow bands will develop over the snow belts with heavy accumulations through Wednesday. See more details below. Highs will be well below normal under the typical northwest flow and generally below freezing for all areas and only in the upper teens for highs over elevations above 1500ft on Tuesday. Monday through Wednesday will be normal of that under a northwest flow with downsloping east of the mountains towards the I-95 corridor. Still a few flurries and snow showers may develop east of the mountains courtesy of favorable snow growth and elevated instability. By Wednesday weak upper level ridging will end the lake effect snow and allow for sunshine for many areas by afternoon. Towards Thursday and Friday high temperatures will modify, but still be below normal by about 5F for this time of year. A low will project out of the southern plains. At this point this system looks to be a general west to east moving system with snow north of the center of circulation. It remains under question of how far north the synoptic moisture will reach. Interestingly enough GFS ensembles are farther north than the operational model, which is usually a sign the operational GFS is too far south. The ECMWF is a bit weaker with the system shearing it out as it moves eastward. The GGEM and UKMET are stronger towards the GFS. At this point I think this has a pretty good potential of delivering an accumulating snow for parts of the Middle Atlantic. I am not sure how far north, but corresponding with a weak southeast ridge from the Nina, I would not be surprised to see a northern shift. At least this system will not be heading inland flooding everyone with warm air. Stay tuned. By the weekend behind the shortwave, the flow will turn west-northwesterly with a bit of lake effect snow. But accumulations will stay under 4in for the snow belts this time around. Temperatures will stay below normal.

"Regional Satellite"

(Courtesy of Penn State Meteo.)

"Current Water Vapor Loop"

(Courtesy of Penn State Meteo.)

"Lake Effect Snow Conditions" (Updated 12/11)
Another very impressive lake effect snow outbreak will be occurring for the first half of this upcoming week. A double barrel low pressure system will track up through western New York State. This will flood much of the region with warmer air on Sunday as temperatures rise into the 40s. But a deep -2SD trough will quickly be sinking down through the Midwest with much colder air. The primary low pressure will situate itself just north of New Hampshire in Canada as it slowly becomes cutoff from the flow. By Monday, the entire Northeast will be entranced in a well-defined cyclonic flow. H85 thermals will drop to near (-15C)-(-17C) over the northern Middle Atlantic. The Great Lakes still have relatively warm sea surface temperatures. This air to water contrast will create a great amount of instability in the region in correspondence with a relatively moist northwest flow. As the low pressure pulls away, an area of dry air and subsidence will initially work into the region after the wrap-around snows by Monday morning. A tight pressure gradient between the primary low north of New England and the 1024mb high pressure sinking over the Midwest will create winds to gust 30-40mph over the entire northern Middle Atlantic with gusts reaching 45mph on the ridgetops. Increasing Omega and favorable dendritic growth layers will enhance sharp lake effect snow bands off of Lake Erie. The flow will initially favor a 300 degree trajectory. This will put the Laurel Highlands at a high risk of upsloping, orographically enhanced lake effect snow south through western Maryland. Snow ratios will be very impressive and nearly 30:1. Also has the northwest flow becomes dominate aloft and at the surface, the Huron-Erie streamer train will begin towards Monday night with heavy snows across the Laurel Highlands. By Tuesday a bit more northerly component begins with a 320 degree trajectory. This will bring lake effect snow bands off of Erie with a bit of Huron enhancement south into northwestern and northern Pennsylvania. Snow totals will quickly add up across the higher elevations of Erie, Crawford, Mercer, and Warren counties. 700mb RH values indicate a relatively moist flow considering the low 515dm 1000-500mb thicknesses. The extended northwest flow will bring lake effect snow showers southeast of the Alleghanies with an occasional streamer or two. Exact position remains uncertain but some areas could see a quick accumulation in the Tuesday time frame downwind of the Appalachians. In any case flurries will be common over all of Pennsylvania, Maryland, and Delaware for Monday through early Wednesday. Total snow accumulations will range from 6-14in across western Maryland up through the Laurel Highlands. Over northwestern Pennsylvania 12-24in is possible with snow totals in excess of 30in in isolated locations. Northeastern Pennsylvania over northern Susquehanna and Wayne counties will see 1-3in along with the Poconos in Carbon and Monroe counties. Across the northern mountains of Pennsylvania and central Alleghany plateau snow accumulations will be highly dependent on where streamers are setup with areal accumulations of 1-3in and isolated locations of 4-7in. Downwind of the mountains general T-2in accumulations are possible. Weak upper level ridging will cutoff the lake effect snow machine by Wednesday evening as a weak shortwave gathers energy in the southern Plains. I will likely be issuing a snow map in the coming days. Stay tuned!

"Snow Map"

*Note the higher snow totals will be favored to the higher elevations and typical snow belt locations. A few wrap-around snow showers and lake effect squalls may give areas downwind of the Appalachians a quick C-2in some areas.

"Current Great Lakes Water Temperatures"

(Courtesy of NOAA)

"Current River Ice Reports and Ski Conditions" (Updated 12/11)
This past week has greatly increased snow pack over the lake effect snow belts courtesy of a multi-day outbreak. Snow depths after some compacting were still near 40in in parts of northwestern Pennsylvania in Erie, Crawford, Mercer, and Warren Counties. Parts of the Laurel Highlands also saw nearly 1-2ft of snow. Elsewhere accumulations were spotty, but a weak warm front brought at least a heavy coating of snow to much of northern Maryland and most all of Pennsylvania. Several days of temperatures at or below freezing also allowed local ski resorts to begin making snow allowing for this weekend to be the opening date for many locations even south into Maryland. Parts of Garret and Alleghany counties in Maryland also received heavy lake effect snow accumulations with reports over two feet near Deep Creek, Maryland. Overnight temperatures have recently fallen well below normal courtesy of radiational cooling with even a low of -10 being reported in Potter County the other night in Pennsylvania. These cold temperatures have allowed for the buildup of ice on local waterways especially small lakes and ponds including small creeks. Even here in southcentral Pennsylvania, many farm ponds are frozen over. But even across the northern mountains of Pennsylvania and western Maryland, ice thicknesses remain less than the safe 4in, so it is advised to remain off. Unfortunately a low will track to the west of the northern Middle Atlantic for the beginning of this calendar week flooding the region with temperatures into the 40s accompanied by heavy rainfall. This will melt local waterway ice and snow across the lake effect snow belts. But cold air will come flooding into the region by Sunday evening turning remaining precipitation over to snow and possibly even creating flash freeze conditions by early Monday morning. The lake effect snow machine will begin in earnest for the beginning of the upcoming week with significant accumulations in the snow belts. See more information in the lake effect discussion. Also late week brings the chance for a synoptic snow, especially for southern areas. But some guidance suggests this will stay south into Maryland and Virginia. Generally well below normal temperatures and a few snow showers will allow all ski locations to open their slopes by the end of the week for the entire northern Middle Atlantic.

-Link to official reports page from NWS... Link.
-Link to local ski resort snow conditions... Link.

"Current Northeast Snow Depth and Northeast Wind chills"

(Courtesy of Wunderground)

"Long Term Outlook" (Updated 12/11)
Below normal temperatures will continue into next weekend with the operational GFS indicating H85s around -8C for a majority of the week before Christmas, which would translate highs to be about 5F below normal. For the time being it does not appear any Arctic blasts are headed our way other than early this week. ECMWF ensembles support the anomalous negative AO, which will continue to strengthen the Atlantic blocking and increase height thermals over Greenland. The east-based negative NAO will also continue in the long range with a slightly negative to neutral PNA. This pattern will support troughing over the east coast in the extended range. A few wavelengths support a possible stormy pattern the week of Christmas also. Chances for a white Christmas are slightly higher than normal for the entire Northeast with a guaranteed white Christmas for all of the lake effect snow belts as cold air will secure the snow pack after several rounds of lake effect snow. Any warm up that shows on the models in the coming few days will likely be delayed courtesy of favorable cold wavelengths from Europe and Asia that will translate slowly eastward. Typically these troughing/upstream blocking scenarios always last longer than expected. Looking at possible storm dates, I really do not have any dates outlined out of interest. The extended ECMWF shows a few nor'easter threats towards the 240hr range, but nothing of any consistency. At this point as long as we have the colder temperatures, which are not too cold, then eventually most areas will see a snow threat.

"Current NAO and PNA Predictions"

(Courtesy of NOAA)

"Anchorage, Alaska Tower Cam"

*Back due to popular demand!

"Monthly Temperature/Precipitation Outlook"(December)(Updated 12/11)
After some procrastination, finally here is my December outlook. It is important to note we are in a high end moderate La Nina to strong La Nina. SSTs are well below -1C across the equatorial Pacific and have been cooling ever so slightly this last week courtesy of some upwelling. There are some predictions that the Nina will begin to rapidly end towards next month with some SST warming, but for now the short term is certainly favoring Nina climatology. But fortunately anomalous teleconnections will offer a unique pattern that has zero analogs. The Arctic Oscillation is progged to drop near the -4 or lower standard deviation. This will be likely the only time the AO has dropped that low under a strong Nina regime in December. Unfortunately this will make the monthly forecast very difficult; keep in mind last year's record breaking Arctic Oscillation. The unusual blocking upstream in the North Atlantic and Arctic the last two or three years is likely signaling the continuing theme of a negative decadal regime of the NAO. While there is not much support currently, I certainly believe the NAO is under the influence of decadal cycles similar to the PDO. With this very low NAO and especially AO, this certainly leads me to believe December will be a cold month with a greater chance of snow than typical strong La Nina December climatology. This actual is still in close correspondence with my winter outlook highlighting December as being colder than normal and snowier than normal. While many locations have yet to see accumulating snow, the last two or three weeks of December offer a very high probability of several chances at accumulating snows. Ensemble models indicate the PNA slowly rising to neutral and this may help allow the Pacific to cooperate and prevent storms from running inland. In fact with such anomalously high heights over Greenland, suppression may be a possibility in some instances. This is very anti-typical Nina for December, which typically supports a growing southeast ridge by late December. The Indian Ocean monsoonal patterns are showing signs of possibly allowing the MJO to pulse favorable for eastern snow chances. Guidance supports a stormy week or two before and after Christmas.

In any case I would expect December temperature anomalies to range from (-1.5F)-(-2.5)F for most climate reporting stations. This is a pretty significant cold forecast, but already many stations are at (-4F). That will be slightly modified overtime understandably so. As for precipitation, I expected above normal precipitation with above normal snowfall for all locations in the Northeast.

"Temperature and Precipitation Outlooks from Climate Prediction Center for next 30 days"

(Courtesy of NOAA)

-Winter Outlook 2010-2011...Link.

"Here northeast of Harrisburg 2010-2011 winter statistics"
(Snow Stats)
Current Snow Cover- 0.00in
Monthly Total (November)- Trace
Monthly Total (December)- 0.6in
Seasonal Total- 0.6in
Winter Weather Advisories- 0
Winter Storm Warnings- 0
Ice Storm Warnings- 0
Blizzard Warnings- 0
Freezing Rain Advisories- 1
Winter Storm Watches- 0

(Temperature Stats)
Lowest High Temperature- 24.1F
Lowest Low Temperature- 12.8F
Wind Chill Advisories- 0
Wind Chill Warnings- 0

(Snow Storms Stats)
First accumulating snow - December 10 - 0.50in

"Local Harrisburg Radar"

(Courtesy of WGAL)

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798. Hoynieva
4:32 AM GMT on December 26, 2010
I'm in the SE, TRP, near Detroit. Might as well call it Detroit. Yeah, that didn't pan out at all and it's looking like there will be little to no new snowfall while I'm here, other than occasional dustings. It's even supposed to rain around New Years Eve, so there goes the snow currently on the ground. Enjoy whatever you end up with from this BLIZZARD :)
Member Since: January 20, 2009 Posts: 0 Comments: 1517
797. TheRasberryPatch
1:04 AM GMT on December 23, 2010
Where in Michigan are you Hoy? My in-laws live north of South Bend. They said last weeks LES didn't pan out too much. I think they got a few inches. Right now they have about 3" on the ground.
Member Since: January 26, 2007 Posts: 72 Comments: 6263
796. Hoynieva
10:59 PM GMT on December 22, 2010
Came on to say happy xmas to all in case I don't manage to get back on here. I'm in Michigan with family and friends for the holidays now and it looks to be a white xmas, with the 4" currently on the ground, but besides the coating we had last night it's all more than a week old. The clipper never panned out like they had forecasted, leaving us with a dusting rather than 2-4" and it looks like it won't snow again until after xmas.

I'm pulling for that storm to pound you guys even though I'll be missing out. Those models are looking more and more encouraging, lets just hope they don't go back out to sea a day before the storm. Happy Holidays, all, and enjoy the shoveling.
Member Since: January 20, 2009 Posts: 0 Comments: 1517
795. breald
8:57 PM GMT on December 22, 2010
Quoting NEwxguy:
If this thing originates in the northern gulf,its going to be able to tap an awful lot of moisture,so if it gets as big as some of the models take it,it will moisten its own environment,by the time it gets up to me,the qpf will be amazing.I wonder if that system moving along the carribean will help to feed this system or is it too far south.


BTW New, we are getting some pretty good snow here right now. Funny NWS has us a a 20% chance of snow this afternoon..LOL. You guys must be getting hit with the same band we are.
Member Since: May 28, 2008 Posts: 38 Comments: 5303
794. NEwxguy
8:49 PM GMT on December 22, 2010
If this thing originates in the northern gulf,its going to be able to tap an awful lot of moisture,so if it gets as big as some of the models take it,it will moisten its own environment,by the time it gets up to me,the qpf will be amazing.I wonder if that system moving along the carribean will help to feed this system or is it too far south.
Member Since: September 6, 2007 Posts: 887 Comments: 15965
793. breald
8:41 PM GMT on December 22, 2010
I just watched a accuweather video about the storm and they said they do not think the Euro model is correct because there is no low pressure over New England which would allow the storm to travel up the coast.
Member Since: May 28, 2008 Posts: 38 Comments: 5303
792. zotty
8:36 PM GMT on December 22, 2010

Quoting PalmyraPunishment:
1.70 qpf in Philadelphia. That is absolutely insane.
what what what?!?  20:1 ratio that's just short of three FEET of snow.  what what what?!?

yes yes, I may have been hatched, but it is better than being born via binary fission, you amoeba proteus.  hahaha!  

i just called you a protist.  hahahaha!
Member Since: August 19, 2009 Posts: 0 Comments: 766
791. Zachary Labe
8:27 PM GMT on December 22, 2010
Quoting TheRasberryPatch:
Look at the temperatures almost near 40F. NWS has been off this week on high temps. Today they forecasted 34F.

It has been dry the past couple weeks too.

Good point! MOS guidance has been way off this week. The nights have been warmer than expected with clouds and wind so therefore the day can warm up a tad more. Still though it will be plenty cold towards the weekend.
Member Since: December 14, 2007 Posts: 284 Comments: 15112
790. Zachary Labe
8:26 PM GMT on December 22, 2010
Quoting PalmyraPunishment:


You forget it's Christmas Eve? It's not like dude's life is school/blog. He may have family like the rest of us. I'm sure he wasn't hatched like Zotty or poured into a fishbowl out of a powder like HeavySeahorse was. Your assumption may be wrong. lol.

Hahaha... If this is legitiment I'll be here until the early evening on Friday. By the way 12z ECMWF is a tad over 1in of QPF. We are in an area of amazing ratios with a -8C 850 thermal, but dry air could prevent the really high ratios. We still would probably get 15in of snow or a tad less on the 12z ECMWF. And given the track of the storm, it probably would be more than the ECWMF is showing.
Member Since: December 14, 2007 Posts: 284 Comments: 15112
789. shipweather
8:26 PM GMT on December 22, 2010
Quoting PalmyraPunishment:


You forget it's Christmas Eve? It's not like dude's life is school/blog. He may have family like the rest of us. I'm sure he wasn't hatched like Zotty or poured into a fishbowl out of a powder like HeavySeahorse was. Your assumption may be wrong. lol.


pish posh.
Member Since: December 15, 2007 Posts: 19 Comments: 987
788. TheRasberryPatch
8:25 PM GMT on December 22, 2010
Look at the temperatures almost near 40F. NWS has been off this week on high temps. Today they forecasted 34F.

It has been dry the past couple weeks too.
Member Since: January 26, 2007 Posts: 72 Comments: 6263
787. PalmyraPunishment
8:20 PM GMT on December 22, 2010
Quoting shipweather:
YES!!!! Our fearless leader is back from the drudges of schooldom. Good news, no school Friday, he'll be in all day to keep up updated on the model mess.

[all assumptions]


You forget it's Christmas Eve? It's not like dude's life is school/blog. He may have family like the rest of us. I'm sure he wasn't hatched like Zotty or poured into a fishbowl out of a powder like HeavySeahorse was. Your assumption may be wrong. lol.
Member Since: January 31, 2007 Posts: 9 Comments: 2250
786. MarylandGirl
8:19 PM GMT on December 22, 2010
Now I am starting to get excited! Looking better all the time, we are on the western shore of the bay...well almost. Tomorrow things should really be coming together. Not sure if Christmas eve shopping around here will be for presents or groceries!!! Thanks for the posts guys!
Member Since: September 10, 2001 Posts: 2 Comments: 486
785. shipweather
8:18 PM GMT on December 22, 2010
YES!!!! Our fearless leader is back from the drudges of schooldom. Good news, no school Friday, he'll be in all day to keep up updated on the model mess.

[all assumptions]
Member Since: December 15, 2007 Posts: 19 Comments: 987
784. Zachary Labe
8:13 PM GMT on December 22, 2010
Wow, that ECMWF is crazy! And do not fret about QPF. If the ECMWF is anything right, the Miller A will throw a large precipitation shield without the sharp cutoff. The ECMWF always underestimates QPF. But still keep expectations low. I will have more soon.
Member Since: December 14, 2007 Posts: 284 Comments: 15112
783. TheDawnAwakening
8:08 PM GMT on December 22, 2010
Stop complaining about the QPF cutoffs right now, worry about the consistency in the track of the low on the guidance, worry about QPF within 48 hours. Models will correct to recognize the strength of the low is not equating the right QPF.
Member Since: October 21, 2008 Posts: 246 Comments: 3970
782. Finky
8:05 PM GMT on December 22, 2010
PP,

The gang over at accuweather said Harrisburg had a qpf of over 1 and should have ratios of higher than 12 to 1...I dont know the first thing about the weather but i am slowly learning...And those totals from HM's Map seem to be awfully low from what i can tell.
Member Since: November 18, 2008 Posts: 0 Comments: 119
781. onoweather
7:55 PM GMT on December 22, 2010
well things are looking up... GEFS and the GFS seem to be on the same page. The QPF output of both is fairly similar. The EURO is still the furthest west, but this is a good looking run of models.
Member Since: December 3, 2008 Posts: 0 Comments: 58
780. NYBizBee
7:37 PM GMT on December 22, 2010
Quoting PalmyraPunishment:


lol....where is the east coast? wow
Member Since: February 5, 2010 Posts: 0 Comments: 292
779. PalmyraPunishment
7:36 PM GMT on December 22, 2010
One thing we need to keep in mind, folks is that while yes, the Euro bombed out -- it also featured a very sharp east/west gradient and qpf isn't as great for the Lower Susquehanna Valley as it is for Philadelphia/NY/NJ/Richmond. Last run I believe had us at around .50 qpf as compared to Philadelphia's 1.70 qpf.

Margusity just posted a snow map.


Member Since: January 31, 2007 Posts: 9 Comments: 2250
778. PalmyraPunishment
7:32 PM GMT on December 22, 2010
Member Since: January 31, 2007 Posts: 9 Comments: 2250
777. DoverWxwatchter
7:29 PM GMT on December 22, 2010
It would be wild if we saw a noreaster challenge or surpass the barometric pressures we saw in the Minnesota storm last October.
Member Since: October 30, 2010 Posts: 10 Comments: 707
776. Drakoen
7:23 PM GMT on December 22, 2010
Just looked at the ECMWF 12z QPF maps. Very impressive band running up through North Carolina, Virginia, up into eastern PA and NY.
Member Since: October 28, 2006 Posts: 57 Comments: 30670
775. TheDawnAwakening
7:14 PM GMT on December 22, 2010
EURO may be pushing this storm to the east too quickly, as in occluding too fast. Should see this be more smooth in future runs, really good regardless, potential mixing issues for the Cape as usual, impressive deformation zone and incredible low level jet.
Member Since: October 21, 2008 Posts: 246 Comments: 3970
774. P451
7:09 PM GMT on December 22, 2010
Anyone really believe the model hype yet?

Also what is the timing of this event now?

Wondering if I should just bite the bullet and come home Saturday instead of risking it already snowing in NJ as I try to get there early Sunday AM.

I guess it's far too early to be calling travel plans based on this situation but I really cannot afford to be stranded up here...whereas I would be fine if it happened down in NJ given what I have to tend to.

Since I'm not home I don't have the usual resources and time to watch this thing unfold.

Depending on you guys for maps and posts this go around. :)

Member Since: December 16, 2007 Posts: 7 Comments: 10202
773. originalLT
7:07 PM GMT on December 22, 2010
I'm trying to "curb my enthusiasm" till thurs. PM. model runs. It looks too good now.
Member Since: January 31, 2009 Posts: 0 Comments: 7857
772. Drakoen
6:53 PM GMT on December 22, 2010
Very impressive run of the ECMWF and it has come in a bit further west. Too bad it's not far enough west to reach me here in Western WV but this should be a blockbuster for the Mid-Atlantic and Northeast.
Member Since: October 28, 2006 Posts: 57 Comments: 30670
771. PalmyraPunishment
6:42 PM GMT on December 22, 2010
1.70 qpf in Philadelphia. That is absolutely insane.
Member Since: January 31, 2007 Posts: 9 Comments: 2250
770. shipweather
6:24 PM GMT on December 22, 2010
EURO is a bomb again!!!
Member Since: December 15, 2007 Posts: 19 Comments: 987
769. TheDawnAwakening
5:54 PM GMT on December 22, 2010
SNE looks to be the jackpot right now. Only change within the next few days is to the west.
Member Since: October 21, 2008 Posts: 246 Comments: 3970
768. tropicfreak
5:10 PM GMT on December 22, 2010
Member Since: September 2, 2006 Posts: 110 Comments: 6878
767. tropicfreak
5:08 PM GMT on December 22, 2010
Euro is putting a 971 mb low just off the coast, and the GFS is putting a 961 mb low a little further off the coast but again, the GFS is trending west.
Member Since: September 2, 2006 Posts: 110 Comments: 6878
766. tropicfreak
5:01 PM GMT on December 22, 2010
ECMWF wants to throw 2 feet of snow over Richmond VA and they have been consistent on that, so it could happen, and GFS is trending towards the Euro track, so we may have the GFS jump on board.
Member Since: September 2, 2006 Posts: 110 Comments: 6878
765. breald
4:49 PM GMT on December 22, 2010
Quoting nesnow383:
How do we fare in southern new england??


It is still not known but if the low hugs the coast like some models predict we will be in for a pretty good storm.

Funny, retail stores are starting to jump on the hype and display shovels and salt right in the front of the stores.
Member Since: May 28, 2008 Posts: 38 Comments: 5303
764. zotty
4:47 PM GMT on December 22, 2010

Quoting PalmyraPunishment:


Yeah, I like the guy. Just wish he would use better f'n graphics.

*thinks to self*: hmm, you are a gfx designer, perhaps you could offer free premium membership for clear, non pixelated graphics.
Yeah, the graphics make me wonder if he writes notes in crayon.  I like him all the same
Member Since: August 19, 2009 Posts: 0 Comments: 766
763. shipweather
4:42 PM GMT on December 22, 2010
Being home in Kutztown is going to make the difference here. Last year it was the reverse in that December storm, Shippensburg ended up with 10+ and we "only" ended up with 5+ here in Kutztown. Hope these models keep staying on track.

PP- you posted blogs where the the mets. were talking about waiting for it to come ashore, when is that going to occur, did they say?
Member Since: December 15, 2007 Posts: 19 Comments: 987
762. PalmyraPunishment
4:32 PM GMT on December 22, 2010
Quoting zotty:
PP- thanks for the introduction to NYNJPA weather- very informative.  


Yeah, I like the guy. Just wish he would use better f'n graphics.

*thinks to self*: hmm, you are a gfx designer, perhaps you could offer free premium membership for clear, non pixelated graphics.
Member Since: January 31, 2007 Posts: 9 Comments: 2250
761. nesnow383
4:29 PM GMT on December 22, 2010
How do we fare in southern new england??
Member Since: February 10, 2010 Posts: 0 Comments: 54
760. zotty
4:28 PM GMT on December 22, 2010
PP- thanks for the introduction to NYNJPA weather- very informative.  
Just like everything else in life, timing timing timing.  While the euro may indicate I should get more excited than when Beavis first saw Chelsea Clinton on MTV, I am tempering my enthusiasm for this wait and see event.  
Member Since: August 19, 2009 Posts: 0 Comments: 766
759. PalmyraPunishment
4:18 PM GMT on December 22, 2010
GAME ON

Still needs to come to the west, but given the significant change from its past 8 runs, this is HUGE.


Member Since: January 31, 2007 Posts: 9 Comments: 2250
758. 717WeatherLover
4:17 PM GMT on December 22, 2010
Looks like the 12Z GFS is joining the party!!!! Still a bit east for us here in Central PA but there is plenty of time for it to come in. The big difference is that it joins the party of the Euro celebrating a big storm!
Member Since: December 18, 2009 Posts: 0 Comments: 270
757. TheDawnAwakening
3:33 PM GMT on December 22, 2010
Blog updated to reflect a snowfall map for the next 48 hours across New England, another widespread 3-6" of snow anticipated for Maine and then coastal Barnstable and Essex counties of Massachusetts. My blog is updated to only reflect this potential snowfall, as it could be another moderate to significant snowfall, although quite localized.

After 12z EURO run today I will do a full blog update.
Member Since: October 21, 2008 Posts: 246 Comments: 3970
756. PalmyraPunishment
2:58 PM GMT on December 22, 2010
12z NAM is out. Here is a link to a loop of the run.

http://raleighwx.americanwx.com/models/nam/12znam500mbvortNAMLoop.html
Member Since: January 31, 2007 Posts: 9 Comments: 2250
755. PalmyraPunishment
1:35 PM GMT on December 22, 2010
The ECMWF and Euro runs seem almost unreal, that seems to be what is scaring a lot of people regarding this thing. I'd kill for those solutions to pan out, but I want a few more models to come into agreement with that before I feel good about it.

Steven DiMartino of NYNJPAWeather.com posted this snippet on facebook this morning that would really excite (and scare) the masses should those solutions verify.

Going over all the data. Had to look twice at the 00Z ECMWF. What troubles me about the 00Z ECMWF is that the model is physically reasonable. Over 30 hours of steady snow for the region based on ECMWF.

He also stresses a reluctantness to forecast today, as opposed to just watching the system enter from the Pacific...

Part of me doesn't want to forecast, but just watch the water vapor all day long as this disturbance crashes into S CA. It's like watching Godzilla make landfall, if the ECMWF is right.

Henry Margusity just posted this on his facebook, but we all knew this is where he would go.

Daily video has been cut. You can see it on the tab above. I threw the GFS out and went with the euro big daddy...

My take: I want to see this storm enter the pacific and see what happens. Does that low close off in an advantageous position? What do the future runs do with the ridge placement? and what about the atlantic low? There are still questions to be answered, but it seems like the players will all be on the table at some point today.

Enjoy the day. Tomorrow is Festivus; Airing of Grievances commences at 8:30 AM followed by the feats of strength. This is when HeavySeahorse and I finally throw down.

And it looks like I got 2 other dopes in here to wrangle. I guess I'm spending this Christmas season like Russell Crowe. Fightin' 'round the world.

http://www.youtube.com/watch?v=X-DblXaqQMk
Member Since: January 31, 2007 Posts: 9 Comments: 2250
754. P451
1:24 PM GMT on December 22, 2010
Timing pushed even further back. Snow not expected to start until Sunday afternoon now.

That puts us out of range of the NAM or GFS Snowfall potential models.

Meanwhile, the NCEP 06Z model runs are not favorable.

SREF just shows a northern gulf low starting to take shape.

GFS shows the same and then shows a low off of GA and heading right out to sea. NAM doesn't even pick up on anything until the north atlantic.

Member Since: December 16, 2007 Posts: 7 Comments: 10202
753. deepfreeze2010
1:15 PM GMT on December 22, 2010
I used to work in Ithaca, NY which is where Cornell is located its a really nice area around there in the Finger Lakes Region. Totally different weather compaired to here (Harrisburg) though. Cornell is filled with many things to do. And if you always wanted to see some snow and lots of the Syracuse is only a little over a hour away.
Member Since: December 21, 2010 Posts: 0 Comments: 0
752. shoreacres
1:08 PM GMT on December 22, 2010
Blizzard ~ Congratulations! I haven't been by for a while and hadn't seen your post about Cornell. That's just terrific. Obviously, you'll do well - and no doubt enjoy the experience, too.

Not much winter weather going on around here. Made the change over to shorts and flip-flops a couple of days ago, the better to enjoy our 80 degree highs. This is wacky, even for us.

@TheRaspberryPatch ~ On the other hand, snow for Christmas can happen. It did for us - in 2005, I think. Started on Christmas even and by Christmas day they were building snowmen on the beaches all up and down the coast. So - we'll see!

Member Since: October 4, 2004 Posts: 205 Comments: 15288
751. Walshy
1:05 PM GMT on December 22, 2010
Quoting TheRasberryPatch:
I hope the south gets some snow. It is probably something every kid dreams about, but from the stats you mentioned Walshy it doesn't happen. I wonder what other cities in the south haven't seen white Christmas.


Very true. Im in the sweet spot in terms of locations in the southeast. (NC Mountains)

Those big cities will either get a complete miss or bad hit. Interesting to note, the rain snow line is even further south to Atlanta with this one. Will have to keep watching. Special weather statements already issued in Georgia.

Member Since: May 17, 2009 Posts: 2 Comments: 904
750. TheRasberryPatch
12:51 PM GMT on December 22, 2010
I hope the south gets some snow. It is probably something every kid dreams about, but from the stats you mentioned Walshy it doesn't happen. I wonder what other cities in the south haven't seen white Christmas.
Member Since: January 26, 2007 Posts: 72 Comments: 6263
749. Walshy
12:37 PM GMT on December 22, 2010
And even further south.

Area forecast discussion
National Weather Service Greenville-Spartanburg SC
605 am EST Wednesday Dec 22 2010

Either way...if we consider a
white Christmas to be one inch accumulation on Christmas day...that
has not happened in the area from Greenville (1963) to Charlotte
(1947) in nearly 50 to 60 years. If this forecast works out...it
could be an event that will be talked about for the rest of our
lives.
The potential downfall would be if the system slows down even
more...in which case the bulk of the snow would fall on Sunday. Stay
tuned!





Member Since: May 17, 2009 Posts: 2 Comments: 904
748. Walshy
12:33 PM GMT on December 22, 2010
North Carolina going to get slammed.

2+ Feet Possible above 3,000-6,000FT.
1 Foot Possible 1,500-3,000FT.
6-12 inches Possible across the big cities in NC.
Light snow possible further east to Wilmington.


GFS has totals of about half that but at least its on the Euro side now!

Member Since: May 17, 2009 Posts: 2 Comments: 904

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