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December 2022


dmillz25
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54 minutes ago, jm1220 said:

If you're inland sure, there would be plenty of snow on the GFS 12z. But the moisture is coming in on strong ENE flow still. This is the panel at hr93. That would torch anyone near the coast regardless of what's going on at 850mb. Temps during this panel are in the 40s in NYC. For those not well inland, we need the transfer to happen sooner and the low to track ENE sooner so the wind can change direction.

image.png.a177e548c5bf59978559f37b70e8c6b1.png

One important factor of the GEFS is this run has a slightly more east component. This could allow for a little back end snow (nothing like December 02 but maybe light)?

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4 hours ago, Volcanic Winter said:

Not for nothing, if this winter turns out snowy and cold it’s a good omen for the next two winters as well. Volcanic forcing doesn’t erode in a year. But it’s also not all encompassing and can be offset by other unfavorable factors, of course. It’s more another piece of the puzzle.

With the recent paper showing the underestimation of sulfur released in that eruption combined with latest assessment of its size, there’s a very good chance it has a hand in what’s going on. It was as big or even bigger than Pinatubo, just with a different aerosol profile. 

Because I’m a giga geology nerd, one last factoid about HTHH: they recently discovered evidence for underwater pyroclastic flows reaching 80km away from the caldera! That’s absolutely insane. 

I'm more of a layman but with 50 years of learning and observing in person. I've lived all over the country, including a short stint in AK, and have traveled through 43 states so have a fair idea of what thing actually look like. Maybe we should have a Geo-weather thread where we can geek out.

14 minutes ago, Rjay said:

One of the interior guys should start a thread for this week's storm.  Look like a significant snowfall for them.  

If I do it we're guaranteed to get rain :clown:

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Man, these past few years it sure feels like whenever the models hone in on a no-snow solution, they're locked in (imby at least). hopefully the PNA goes positive (feels rare these days) and we can pull something out of it.

I remember 10 or so years ago, a bunch of under 48 hours changes that went from rain to MECS/HECS. Got spoiled I guess.

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6 minutes ago, Brian5671 said:

It's getting late early.   If the 16-17 storm is mostly rain (except far N and W) that take us out another 5 days for anything meaningful....

So far this is the most disappointing blocking pattern I've ever seen. 

Euro & GFS now shove a big trough west after the 16th storm which is not good. 

That's been the theme too with models underestimating the western trough due to the RNA pattern. I wonder if we'll have to wait until 2nd half of winter now when we can get away with a bad pacific. 

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1 minute ago, SnoSki14 said:

So far this is the most disappointing blocking pattern I've ever seen. 

Euro & GFS now shove a big trough west after the 16th storm which is not good. 

That's been the theme too with models underestimating the western trough due to the RNA pattern. I wonder if we'll have to wait until 2nd half of winter now when we can get away with a bad pacific. 

The cold air has yet to show as well.    Dec 96 was warm with blocking this seems to be going the same way....

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37 minutes ago, SnoSki14 said:

So far this is the most disappointing blocking pattern I've ever seen. 

Euro & GFS now shove a big trough west after the 16th storm which is not good. 

That's been the theme too with models underestimating the western trough due to the RNA pattern. I wonder if we'll have to wait until 2nd half of winter now when we can get away with a bad pacific. 

Yeah, the trough in the West is undercutting the block to the north. So the primary lows track to the Great Lakes. Need a strong Rockies ridge to make the pattern favorable for 4”+ snows in NYC. The lag between the December -4.0 and -4.9 AO and the 4”+ snowstorms has been quite variable. The only thing that we know for sure is that the 4.0”+ snowstorm will take longer than 2000 and 1995. 

-4.0 to -4.9 December -AO dates and the next 4.0” snow in NYC 

12-23-00…12-30…12”

12-18-95….12-19….7.7”

12-26-68….2-9….15.3”

12-13-66…12-24….7.1”

12-31-62….1-26…..4.2”

12-23-50…..None
 

 

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Just now, bluewave said:

Yeah, the trough in the West is undercutting the block to the north. So the primary lows track to the Great Lakes. Need a strong Rockies ridge to make the pattern favorable for 4”+ snows in NYC. The lag between the December -4.0 and -4.9 AO and the 4”+ snowstorms has been quite variable. The only thing that we know for sure is that the 4.0”+ snowstorm will take longer than 2000 and 1995. 

-4.0 to -4.9 December -AO dates and the next 4.0” snow in NYC 

12-23-00…12-30…12”

12-18-95….12-19….7.7”

12-26-68….2-9….15.3”

12-13-66…12-24….7.1”

12-31-62….1-26…..4.2”

12-23-50…..None
 

 

Chris what are the chances we repeat with another 4 SD -AO later in the winter (JFM)?

 

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16 minutes ago, LibertyBell said:

What happened in late March 2013 when we had that extremely negative AO?  I don't remember any big snows around then.  3/18-3/26 was one long duration extremely negative AO, that had to have set some records.

 

In March 2013 we had a long duration snow event. 4 to 10 west to east.

 

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16 minutes ago, LibertyBell said:

I remember a storm but I thought it was SNE centric probably the least amount here considering it's late March 4-5 inches maybe

 

 

Forgot to mention it was not a temperature issue for West and southwest, it was the storm was wayyyy out to sea so NE was just closer.

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15 minutes ago, SnoSki14 said:

Some take it under 5. Now that's extremely rare territory if it happens. 

It would be shocking if this pattern didn't eventually produce 

hopefully it will, but early on it looked like something that could give us a few threats-seems to have slowly disappeared with each passing day.    Need some cold air to show up too...

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49 minutes ago, Brian5671 said:

hopefully it will, but early on it looked like something that could give us a few threats-seems to have slowly disappeared with each passing day.    Need some cold air to show up too...

Was always possible we would maybe get a SWFE type event before the PNA went positive but the tendency so far this season early has been for more phasing and or stronger systems so I wasn’t quite too in love with the period before 12/20  

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1 hour ago, Brian5671 said:

hopefully it will, but early on it looked like something that could give us a few threats-seems to have slowly disappeared with each passing day.    Need some cold air to show up too...

Huh? Didn’t you just get an inch of snow yesterday? The cold was always supposed to come after the cutter the end of this week. I see two threats after that with storm track up for debate 

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5 minutes ago, Allsnow said:

Huh? Didn’t you just get an inch of snow yesterday? The cold was always supposed to come after the cutter the end of this week. I see two threats after that with storm track up for debate 

 Bridgeport in the water reported 0.8, so Fairfield had at least an inch. 

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58 minutes ago, Allsnow said:

Huh? Didn’t you just get an inch of snow yesterday? The cold was always supposed to come after the cutter the end of this week. I see two threats after that with storm track up for debate 

We had a coating on the grass.  Gone now.    Let's hope we get something.  Friday looks like all rain so we are kicking the can forward....

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