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Moving past first week of January General Discussion/banter


Baroclinic Zone

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Since Dec 1:

 

ALB: 8 negative departure days, 29 positive departure days, and 1 zero departure day.

BOS: 9 negative departure days (including -1, -1, -1, -2, -2), 25 positive departure days, and 4 zero departure days.

ORH: 8 negative departure days (including -1, -1, -2, -2), 27 positive departure days, and 3 zero departure days.

 

If I'm not mistaken, these climate normals and departures are based on the 30 year period from 1981 - 2010, which was the warmest 30 year period since record keeping began.  Despite the upcoming warmup, with good radiational conditions a few nights, we might be able to keep the monthly and seasonal departures from getting really out of hand.  ALB had one of its coldest nights of the year last night despite warm 850s and a stale snowpack.

 

Global warming FTW.

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I think some of that depends on location.

 

Definitely, but overall temps have been mild too. It's more a question of longevity too I think. But anyways, and Will agrees too...I expect models to ying and yang from 12z to 00z...so hopefully Noreaster27 doesn't live and die by the runs. This could be a great cold source...if we have no moisture...boy what a kick in the pants...lol. I'm hoping that if it gets that cold...maybe it will be clipper-like. I really want this -NAO to develop, that will be key if the PNA tries to drop.

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Since Dec 1:

 

ALB: 8 negative departure days, 29 positive departure days, and 1 zero departure day.

BOS: 9 negative departure days (including -1, -1, -1, -2, -2), 25 positive departure days, and 4 zero departure days.

ORH: 8 negative departure days (including -1, -1, -2, -2), 27 positive departure days, and 3 zero departure days.

 

If I'm not mistaken, these climate normals and departures are based on the 30 year period from 1981 - 2010, which was the warmest 30 year period since record keeping began.  Despite the upcoming warmup, with good radiational conditions a few nights, we might be able to keep the monthly and seasonal departures from getting really out of hand.  ALB had one of its coldest nights of the year last night despite warm 850s and a stale snowpack.

 

Global warming FTW.

 

 

The departures will get sliced pretty hard I think...esp if we get any of that cold that is being dumped from NW Canada and AK into southern Canada and the plains. Some of the stations in AK had their coldest November/December couplet on record...not an easy place to break cold records.

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I'm surprised noreaster27 isn't in here to let us know that the OP Euro run has a big Greenland block in the long range. To give us the good news that the 3 consecutive runs of a +NAO streak is over.

 

is that not a perfect block/-NAO at days 9/10 on the euro (with a storm brewing near the gulf)....???

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Model Ying and Yang with the EC ensembles. Now much better with the -NAO.

 

Cold push is now well within D10 at least. I feel good about a pretty impressive switch to cold. Some wintry chances but the concern is obviously suppression and will depend on downstream blocking and the orientation of flow around PV.

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The departures will get sliced pretty hard I think...esp if we get any of that cold that is being dumped from NW Canada and AK into southern Canada and the plains. Some of the stations in AK had their coldest November/December couplet on record...not an easy place to break cold records.

 

I really hope so, but I would bet against it.  It seems more likely we remain at the periphery of the serious cold.  Even with the muted warmup, it's so much easier to get significant warm depatures than cold.  And that's with the added advantage of modern climate norms.  We've had one cold day so far this winter, aided by perfect radiational conditions and nighttime lows well into negative territory.  As many have said, in winter you need the very cold lows to record significant negative departures.  I don't see evidence of that happening in the foreseeable future.  The modestly cold stormy period at the end of Dec was slightly above normal temp wise (clouds, wind, storms not good for cold).  We'd need serious cold to cut into the departures (and probably dry conditions), and unlike at high latitudes or in the deep interior, it just doesn't seem to get sustained cold anymore at midlatitudes within a few hundred miles of the Ocean.

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High temperature here of 42F with full sunshine. Not much snowmelt just yet, hopefully some melts away on wednesday to allow for Christmas decoration removal. The forecast here for thursday/friday right now from the NWS is for high's near 40F. not exactly very warm.

Yeah just like we figured today 41-42 for a high
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I really hope so, but I would bet against it.  It seems more likely we remain at the periphery of the serious cold.  Even with the muted warmup, it's so much easier to get significant warm depatures than cold.  And that's with the added advantage of modern climate norms.  We've had one cold day so far this winter, aided by perfect radiational conditions and nighttime lows well into negative territory.  As many have said, in winter you need the very cold lows to record significant negative departures.  I don't see evidence of that happening in the foreseeable future.  The modestly cold stormy period at the end of Dec was slightly above normal temp wise (clouds, wind, storms not good for cold).  We'd need serious cold to cut into the departures (and probably dry conditions), and unlike at high latitudes or in the deep interior, it just doesn't seem to get sustained cold anymore at midlatitudes within a few hundred miles of the Ocean.

 

 

 

-EPO is good for cold in our area. We haven't had much of a -EPO since 2009. We'll get good cold if the pattern is right even right to the coast...there is a reason Boston got its coldest January on record in 2004 and that many of us put up a top 10 coldest January in 2009 and 2003 since 1950.

 

We'll see if the EPO is reliable enough this time around to give us a serious cold outbreak...its possible we stay on the fringes which would probably be good for snow. But I think we are going to get at leats one solid uppercut from the cold.

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Tuesday's storm seems to have a wintry appeal... especially inland.

 

With that relatively static trof allignment, I would think much of next week has some wintry potential.  We could be stradling the boundary between airmasses for a few days.  A high gradient regional pattern.

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High temperature here of 42F with full sunshine. Not much snowmelt just yet, hopefully some melts away on wednesday to allow for Christmas decoration removal. The forecast here for thursday/friday right now from the NWS is for high's near 40F. not exactly very warm.

don't worry-by Sunday you'll have no problem. Friday's rain will wash some away too
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-EPO is good for cold in our area. We haven't had much of a -EPO since 2009. We'll get good cold if the pattern is right even right to the coast...there is a reason Boston got its coldest January on record in 2004 and that many of us put up a top 10 coldest January in 2009 and 2003 since 1950.

 

We'll see if the EPO is reliable enough this time around to give us a serious cold outbreak...its possible we stay on the fringes which would probably be good for snow. But I think we are going to get at leats one solid uppercut from the cold.

 

I was in Bos January 2004 and I still remember printouts of the NHEM anomalies in the runup to that period.  I think you're right, it might get really cold.  I believe the temp correlations are viable, I just don't trust model predictions of the indices.  I've always had a problem with the causal predictiveness of modeled climate indices.  I think of them as markers of climate conditions, not drivers.  That's why I don't think collectively the Met community is so good at forecasting in the long range.

 

Every year we shift the goalposts a little further towards warm, so I will always bet on warm except in the short range.  But like you say, if things come together it can still get really really cold.

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