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Colder Unsettled Weather Ahead...
Posted by: Zachary Labe, 4:40 PM GMT on December 27, 2011 +3
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"10mi northeast of Harrisburg 2011-2012 winter statistics"
(Snow Stats)
Current Snow Cover- 0.0in
Monthly Total (October)- 5.5in
Monthly Total (November)- 0.0in
Monthly Total (December)- 0.4in
Seasonal Total- 5.9in
Winter Weather Advisories- 1
Winter Storm Warnings- 1
Ice Storm Warnings- 0
Blizzard Warnings- 0
Freezing Rain Advisories- 0
Winter Storm Watches- 1

(Temperature Stats)
Lowest High Temperature- 31F
Lowest Low Temperature- 17F
Wind Chill Advisories- 0
Wind Chill Warnings- 0

(Snow Storms Stats)
Historic October Nor'easter - October 29 - 5.5in of wet snow
322 Lake Effect Snow Band - December 17 - 0.3in of wet snow
Weak Clipper - December 29 - 0.1in of snow
Categories: Observation Blogs
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Reader Comments
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101. wunderstorm87 6:04 PM GMT on December 29, 2011    
We have some surprise light snow coming down now. 31.7F
Member Since: August 5, 2010 Posts: 0 Comments: 588
102. Beachllama 6:05 PM GMT on December 29, 2011    
Light snow in Germantown, MD, this is a pleasant surprise! Temp 37F.
Member Since: January 9, 2011 Posts: 0 Comments: 138
103. Mason803 8:00 PM GMT on December 29, 2011    
0.2" of snow here in Cashtown today. Brings my ytd snowfall to 4.6" which really isn't that bad all things considered.
Member Since: November 5, 2008 Posts: 0 Comments: 1139
104. Zachary Labe 8:04 PM GMT on December 29, 2011    
Light snow ending here in Linglestown, heavy coating here on most objects.
Member Since: December 14, 2007 Posts: 253 Comments: 14315
105. originalLT 9:05 PM GMT on December 29, 2011    
Blizz, like the term "heavy coating"! Would like the term "heavy snow accumulation" , better!
Member Since: January 31, 2009 Posts: 0 Comments: 5063
106. TheF1Man 9:06 PM GMT on December 29, 2011    
Quoting originalLT:
Blizz, like the term "heavy coating"! Would like the term "heavy snow accumulation" , better!


I'll take a coating at this point! I'm already tired of looking at bare limbs.
Member Since: February 23, 2010 Posts: 0 Comments: 571
107. Zachary Labe 10:18 PM GMT on December 29, 2011    
Getting a nice burst of probably 1mi light snow. Even parts of road getting a quick coating.
Member Since: December 14, 2007 Posts: 253 Comments: 14315
108. listenerVT 3:50 AM GMT on December 30, 2011    
Glad to see you all got the snow I sent down!!

;-)



Quoting Blizzard92:

hmmm, I didn't think it was ever clickable? That upslope effect really plows you guys with snow up there year after year. Even in the worst of winters (this one, lol), upslope never lets you down.



Whenever you hear: "Western slopes of the Green Mountains" ~ that's here!

Strange, I'm sure I've clicked on that map and come up elsewhere before. It might have been at Sully's, and I know Crowe made it clickable on his blog. Somehow I thought I'd done it from here too... *scratches head*


Member Since: July 11, 2007 Posts: 0 Comments: 4790
109. PhillySnow 12:36 PM GMT on December 30, 2011    
We had flurries yesterday afternoon around 2pm. Nothing stuck, but it was a very welcome surprise!

35F here and supposed to go up to 51 today. *sigh*
Member Since: December 18, 2009 Posts: 0 Comments: 795
110. NEwxguy 3:07 PM GMT on December 30, 2011    
our non winter continues this weekend.Even the artic shot next week,isn't anything record breaking and will only last a couple of days.We only had a trace of snow in December so I went looking at past winters with light snowfall in December and most of them continued the this pattern,with some snowfall,but nothing major,a couple years rebounded to have normal snowfall totals,but a lot of others were below normal snowfall for the winter.
Member Since: September 6, 2007 Posts: 816 Comments: 13132
111. Zachary Labe 3:09 PM GMT on December 30, 2011    
Well Middletown officially reported .1in yesterday. Looks like we don't leave skunked here in Harrisburg for December; a whopping .1in of snow officially, woah! And a wonderful .4in here in Linglestown for the month!
Member Since: December 14, 2007 Posts: 253 Comments: 14315
112. MariettaMoon 5:45 PM GMT on December 30, 2011    
Quoting NEwxguy:
our non winter continues this weekend.Even the artic shot next week,isn't anything record breaking and will only last a couple of days.We only had a trace of snow in December so I went looking at past winters with light snowfall in December and most of them continued the this pattern,with some snowfall,but nothing major,a couple years rebounded to have normal snowfall totals,but a lot of others were below normal snowfall for the winter.


Wednesday morning, 01/04 forecast lows F and (daily records F in parenthesis)
Caribou: -4F (-27F)
Burlington: -2F (-27F)
Portland: 9F (-18F)
Concord: 0F (-23F)
Syracuse: 6F (-18F)
Albany: 7F (-15F)
Mount Pocono: 9F (-23F)
Boston: 14F (-4F)
New York: 19F (-3F)
Pittsburgh: 14F (-8F)
Harrisburg: 18F (3F)
Philadelphia: 20F (2F)
Baltimore: 17F (4F)
Washington: 22F (-3F)
Member Since: June 11, 2011 Posts: 36 Comments: 676
113. MariettaMoon 6:23 PM GMT on December 30, 2011    
Blizz: I'm really shocked that there's no coastal cyclone development given how amplified the trough is early next week. It seems that since there is no Greenland/Iceland block, the trough is so progressive that it just sweeps right through giving a very small window of opportunity for coastal cyclogenesis. An area of low pressure does end up firing up well off the coast south/southeast of the Canadian Maritimes.

Also, the 980mb low over Quebec early next week is so large and strong that the wind effects are felt all the way down into the Carolinas, with strong west winds blowing well offshore not allowing south/east winds to blow from the Gulf Stream to the shore, inhibiting cyclogenesis there.

Am I right/wrong in my analysis of the situation?
Member Since: June 11, 2011 Posts: 36 Comments: 676
114. Zachary Labe 8:49 PM GMT on December 30, 2011    
Quoting MariettaMoon:
Blizz: I'm really shocked that there's no coastal cyclone development given how amplified the trough is early next week. It seems that since there is no Greenland/Iceland block, the trough is so progressive that it just sweeps right through giving a very small window of opportunity for coastal cyclogenesis. An area of low pressure does end up firing up well off the coast south/southeast of the Canadian Maritimes.

Also, the 980mb low over Quebec early next week is so large and strong that the wind effects are felt all the way down into the Carolinas, with strong west winds blowing well offshore not allowing south/east winds to blow from the Gulf Stream to the shore, inhibiting cyclogenesis there.

Am I right/wrong in my analysis of the situation?

Your analysis is completely accurate. The flow is definitely too progressive next week for the low pressure to move along the coast; had there been a blocking mechanism, perhaps things would be different. Latest 12z ECWMF strengthens the low about 300mi off the coast, but there really isn't any feature that should pull it back west.
Member Since: December 14, 2007 Posts: 253 Comments: 14315
115. Zachary Labe 10:37 PM GMT on December 30, 2011    
You know the weather pattern is bad when an Alberta clipper brings rain as far north as the the US/Canadian border; what a depressing winter!
Member Since: December 14, 2007 Posts: 253 Comments: 14315
116. HeavySnow 11:43 PM GMT on December 30, 2011    
Quoting Blizzard92:
You know the weather pattern is bad when an Alberta clipper brings rain as far north as the the US/Canadian border; what a depressing winter!


Any glimmer of hope on the horizon(or further)?

Winter of 2012-2013?
Member Since: July 7, 2004 Posts: 18 Comments: 2918
117. Zachary Labe 11:45 PM GMT on December 30, 2011    
Quoting HeavySnow:


Any glimmer of hope on the horizon(or further)?

Winter of 2012-2013?

We can cross our fingers that a lake effect snow shower moves east of the mountains next week, although down there I doubt there is much chance. Looks like a warm spell is coming next weekend already. I predict this month will feature temperature mean anomalies of +3.0F for most areas.
Member Since: December 14, 2007 Posts: 253 Comments: 14315
118. TheF1Man 12:24 AM GMT on December 31, 2011    
Clipper actually looks pretty good on the radar. Any chance that the temperature will suddenly drop 30 degrees?! Played football with friends today, wore shorts and short-sleeves no problem. I don't ever remember being able to do that.

Blizz is this the opposite to last year where all of the cold air spilled out of the arctic and into the U.S. Now this year it's all bottled up?

Member Since: February 23, 2010 Posts: 0 Comments: 571
119. originalLT 12:45 AM GMT on December 31, 2011    
Nature does tend to even-out things over the long run. We've just had two very snowy winters in a row, not surprised if we get a horrible one(for snow that is) ,this winter season.
Member Since: January 31, 2009 Posts: 0 Comments: 5063
120. Zachary Labe 12:50 AM GMT on December 31, 2011    
Quoting TheF1Man:
Clipper actually looks pretty good on the radar. Any chance that the temperature will suddenly drop 30 degrees?! Played football with friends today, wore shorts and short-sleeves no problem. I don't ever remember being able to do that.

Blizz is this the opposite to last year where all of the cold air spilled out of the arctic and into the U.S. Now this year it's all bottled up?


Polar vortex over Alaska is killing us allowing Pacific air to flood the entire nation.

originalLT- Farther inland was a low snow year compared to the I-95 corridor last winter. We ended with nearly 10in below average here in Harrisburg. And we missed the heaviest snows during 09-10.
Member Since: December 14, 2007 Posts: 253 Comments: 14315
121. originalLT 12:53 AM GMT on December 31, 2011    
And you are right, TheF1Man, that clipper has a nice "swirl" to it. I guess they are saying it's the positive NAO, and other things as Blizz has said, and no blocking over Greenland that's really hurting our chances for coastal storm developement, and the lack of a nice cold high pressure system over Eastern Canada to funnel down some nice cold North East winds.
Member Since: January 31, 2009 Posts: 0 Comments: 5063
122. photonchaser 2:21 AM GMT on December 31, 2011    
We got a short 15 minute burst of snow today which left a nice dusting on all the trees. At least it sort of looks like winter...for now.
Member Since: June 3, 2004 Posts: 1 Comments: 134
123. originalLT 3:41 AM GMT on December 31, 2011    
Thanks Blizz, didn't realize that for you guys in the LSV, But you have to admit the set-up was better, more conducive to the possibility for snow for the NE than this year for sure, you happened to miss it last year I guess.
Member Since: January 31, 2009 Posts: 0 Comments: 5063
124. originalLT 3:49 AM GMT on December 31, 2011    
Blizz, just looked at your charts from your posts #37 and #41, very interesting--big difference in accumulation from Philly to Harrisburg. For 2010-2011 winter , Harrisburg looked to be about 5" less than "average", if I'm reading it right.
Member Since: January 31, 2009 Posts: 0 Comments: 5063
125. listenerVT 4:04 AM GMT on December 31, 2011    
Got home from work just past 8pm last night and it was 2F here. We saw -3F on the porch thermometer. Today the birds were at the feeders in full force, and it warmed to 17F by the time I had to leave to pick up my Granddaughter. I'd say we got another inch or so of snow. Tonight, though, the temps are on the rise (about 24F here now). We're looking at freezing rain overnight and until sometime after I drive to work in the morning.
Member Since: July 11, 2007 Posts: 0 Comments: 4790
126. Zachary Labe 4:14 AM GMT on December 31, 2011    
Quoting originalLT:
Blizz, just looked at your charts from your posts #37 and #41, very interesting--big difference in accumulation from Philly to Harrisburg. For 2010-2011 winter , Harrisburg looked to be about 5" less than "average", if I'm reading it right.

You are 100% correct; totally different setup last year which was very conducive to eastern snowfalls. We just unfortunately missed out here to the west. You are reading that chart correctly, but it is based on Middletown Airport (KMDT). Their average is 4in lower than the actual city of Harrisburg. And then up here along the mountain you can add about another 4in to the average. I would say here in Linglestown, I am around 38in for a seasonal average. Middletown is along the river and a good bit south of here including the city of Harrisburg. It always makes me angry that our records are based at a location so displaced from the actual city which holds the record title.

I hope that made sense, lol.
Member Since: December 14, 2007 Posts: 253 Comments: 14315
127. weatherman321 5:34 AM GMT on December 31, 2011    
Excited for this lake effect event, for early next week.
Currently were forecast to receive c-2in on monday, 2-4in monday night and c-1in for tuesday.. Pattern change still don't look good for january...maybe Feb? but anyways I'll take what ever i can get at this point.
Member Since: August 23, 2008 Posts: 0 Comments: 139
128. Zachary Labe 2:46 PM GMT on December 31, 2011    
Even the lake effect event does not look quite as good as it once did; the arctic front lags a bit on Monday keeping the flow west-southwest for a time. That flow is horrible for Pennsylvania for lake effect, but does give a nice band up through Buffalo and Watertown, NY.
Member Since: December 14, 2007 Posts: 253 Comments: 14315
129. Mason803 3:30 PM GMT on December 31, 2011    
temp has jumped to 54f already this morning. i think i might have the warmest temp in the state. just lovely
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130. Zachary Labe 3:58 PM GMT on December 31, 2011    
Quoting Mason803:
temp has jumped to 54f already this morning. i think i might have the warmest temp in the state. just lovely

Up to 51F here currently; feels extremely warm outside today!
Member Since: December 14, 2007 Posts: 253 Comments: 14315
131. TheRasberryPatch 4:13 PM GMT on December 31, 2011    
Good morning Blizz

I am up here in Niles, MI just north of South Bend. They have Winter Storm Watch for Sunday evening into Tuesday morning. Heavy snow is predicted from the LES. Any thoughts? I am travelling supposedly Monday AM, but I am afraid it will be bad road conditions all day Monday from the Indiania Toll Rd into Ohio Turnpike and through to Somerset. I realize LES isn't easy to predict. The winds are supposed to be strong with temps on Monday in low 20's. I just am concerned the road conditions with snow, blowing and drifting snow. Not fun. I may just leave on Sunday afternoon with temps closer to freezing.
Member Since: January 26, 2007 Posts: 72 Comments: 5645
132. originalLT 4:16 PM GMT on December 31, 2011    
TRP, I hope Blizz can give you some idea of how bad the LES will be for you. In any event, be careful on the road. Safe trip back. LT
Member Since: January 31, 2009 Posts: 0 Comments: 5063
133. Zachary Labe 4:35 PM GMT on December 31, 2011    
Quoting TheRasberryPatch:
Good morning Blizz

I am up here in Niles, MI just north of South Bend. They have Winter Storm Watch for Sunday evening into Tuesday morning. Heavy snow is predicted from the LES. Any thoughts? I am travelling supposedly Monday AM, but I am afraid it will be bad road conditions all day Monday from the Indiania Toll Rd into Ohio Turnpike and through to Somerset. I realize LES isn't easy to predict. The winds are supposed to be strong with temps on Monday in low 20's. I just am concerned the road conditions with snow, blowing and drifting snow. Not fun. I may just leave on Sunday afternoon with temps closer to freezing.

I would advise leaving as early as possible. Conditions are going to rapidly deteriorate by Sunday evening through Tuesday night with blizzard conditions across all of the snow belt regions. It is pretty much guaranteed for several severe bands isolated through the entire area of interstate. Winds will be nearing 45mph, so blowing snow will be a major problem with whiteout conditions.
Member Since: December 14, 2007 Posts: 253 Comments: 14315
134. TheRasberryPatch 5:07 PM GMT on December 31, 2011    
Thank you so much for your forecast and advice, Blizz. It is very much appreciated.
I sort of thought conditions would be bad with the winds they were predicting. This will be the first LES here in Niles, MI. Pretty incredible and figures it almost always occurs when I am traveling back.

Do you think conditions will be bad throughout the PA turnpike? or just the snowbelt regions? I noticed they don't have much for LSV forecast.

Thank you for your thoughts LT. I have done this drive in the past white knuckled and it isn't fun.
Member Since: January 26, 2007 Posts: 72 Comments: 5645
135. Zachary Labe 5:18 PM GMT on December 31, 2011    
Quoting TheRasberryPatch:
Thank you so much for your forecast and advice, Blizz. It is very much appreciated.
I sort of thought conditions would be bad with the winds they were predicting. This will be the first LES here in Niles, MI. Pretty incredible and figures it almost always occurs when I am traveling back.

Do you think conditions will be bad throughout the PA turnpike? or just the snowbelt regions? I noticed they don't have much for LSV forecast.

Thank you for your thoughts LT. I have done this drive in the past white knuckled and it isn't fun.

The Laurels could be pretty bad on the turnpike between Latrobe and Bedford. Conditions could be near whiteout by late Sunday night into Monday around Somerset. A few squalls are likely to make it into the LSV, but predicting those will be impossible to track where until a few hours before (maybe 322 band). Winds along the turnpike may be howling upwards of 55mph above 1500ft Sunday night.

I am working on a new blog detailing the lake effect and cold outbreak. It will probably be posted Sunday morning or so.
Member Since: December 14, 2007 Posts: 253 Comments: 14315
136. Zachary Labe 5:32 PM GMT on December 31, 2011    
12z GFS is best run I have seen in a while... Actually brings the cold air and precipitation together. Almost 10in of snow verbatim on the GFS for KMDT in the long range.
Member Since: December 14, 2007 Posts: 253 Comments: 14315
138. bwi 5:56 PM GMT on December 31, 2011    
62 degrees at DCA -- 57 here in close-in MD suburbs.
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139. PhillySnow 5:56 PM GMT on December 31, 2011    
56F here and a beautiful spring day yet again. It's amazing how green our grass is. I'm glad to hear there's some cold air coming, and possibly even with precipitation for some folk!
Member Since: December 18, 2009 Posts: 0 Comments: 795
140. HeavySnow 6:16 PM GMT on December 31, 2011    
Disgustingly, brutally warm weather here in DC. I'm on Cap Hill now and it is shorts weather for me. Gross. How far out is that 10 inches for KMDT Blizz? I need sunblock. Ski Liberty needs, hmmm, where do I start. Well, they have booze and the golf course is still probably open. They are hurting worse than all of us.
Member Since: July 7, 2004 Posts: 18 Comments: 2918
141. Zachary Labe 7:42 PM GMT on December 31, 2011    
Quoting HeavySnow:
Disgustingly, brutally warm weather here in DC. I'm on Cap Hill now and it is shorts weather for me. Gross. How far out is that 10 inches for KMDT Blizz? I need sunblock. Ski Liberty needs, hmmm, where do I start. Well, they have booze and the golf course is still probably open. They are hurting worse than all of us.

The 10in is an accretion of several smaller snow events over the longer range around the day 10-16 range.
Member Since: December 14, 2007 Posts: 253 Comments: 14315
142. TheRasberryPatch 8:53 PM GMT on December 31, 2011    
Thank You Blizz. so nice to have your expertise available.

Hopefully, once I get over the mountain and that tunnel just east of Somerset it won't be bad.

On my way out here on Wednesday I hit a lot of snow showers from Carlisle through Pittsburgh. There was snow on the ground from Somerset all the way to Niles. The snow is gone with temps getting into the upper 40's yesterday. Yesterday we had 0.31" of rain. Today is pretty nice with highs in the low 40's.
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About Blizzard92
Cornell University- Atmospheric Sciences Student; Central PA SKYWARN Storm Spotter; American Meteorological Society Member; PA CoCoRaHS Branch Member

Personal Weather Stations
Linglestown, PA
Elevation: 520 ft
Temperature: 62.5 °F
Dew Point: 61.9 °F
Humidity: 98%
Wind: Calm
Wind Gust: 0.0 mph
Updated: 9:48 PM EDT on May 23, 2013
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