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Winter 2021-22


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15 hours ago, StormchaserChuck! said:

We won't have Moderate La Nina without -PNA. 

You can’t just decide to define a Nina differently. The point you’re making about the oddity and abnormal (non nina) behavior is very valid but by the way we define a Nina it was a Nina. This is irrelevant since we have almost none of the oddities that causes 1995/6 to behave antithetical too a canonical Nina. 

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4 hours ago, psuhoffman said:

You can’t just decide to define a Nina differently. The point you’re making about the oddity and abnormal (non nina) behavior is very valid but by the way we define a Nina it was a Nina. This is irrelevant since we have almost none of the oddities that causes 1995/6 to behave antithetical too a canonical Nina. 

Go out and measure Pacific equilatoral SSTs in December..

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1 hour ago, Stormfly said:

Like the winter of '77 when people were driving their cars on the ice @the inner harbor!  YIKE! :D

Cold but no snow.  YUCK!

Earth's gravity was weaker in those days, so cars weighed less.  Actually, I was driving a '68 VW Beetle that winter, (weight < 1800#) so maybe there's some truth there. 
I do recall looking at certain wheel tracks on the ice of the WSSC reservoir at the Rte 29 bridge. But I did not drive my car on the ice. I think it was a Chevy Vega. (Don't ask how I know.) 
Kids today don't know the fun they're missing. 

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I'm sure the thickness of the ice was no problem!  I remember helping my grandfather break ice around the pilings on his wharf on Stoney Creek well into April and the ice was still 4" thick!  Incredible!  I also remember hearing what sounded like thunder as far away as Parkville - outside of the beltway and it was told it was essentially calving!  I'm OK with change as in getting colder and LOVE cold as I get older BUT it gets expensive keeping the abode warm too!  May have to put in another wood stove and increase the size of the woodpile!

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It doesn't work reliably in Baltimore/DC and south, but in La Nina years, ACE over 150 is almost a pre-requisite Summer trait for the big NE snowy winters. Pretty sure there are no La Ninas more than +20% or +30% for NYC/Philly snow totals since 1930 when ACE is not at least 150. I know you guys don't live up there, but if you hit 150 ACE in the Summer, you at least have a shot at a lot of Nor'easters with blocking.

The big ACE La Nina years since 1931-32 are these, in order of highest ACE:

1933, 2005, 1995, 2017, 1950, 1998, 2020, 1999, 2010, 1955, 1964.

If you use Baltimore, the 11-year average snowfall is (44.6+19.6+62.5+15.4+6.2+15.2+10.9+26.1+14.4+18.1+18.6)/11 --> 22.9, and essentially a coin flip for near-normal to snowy conditions using the 1991-2020 snow average.

1933-34, 2005-06, 1995-96, 1999-00, 1955-56, 1964-65 are all near average to snowy using the most recent 30 years. 2020-21 and 2010-11 would probably be snowy patterns too with less bad luck.

 

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21 hours ago, Chris78 said:

Is this a good thing or bad thing for snow prospects? 

It has 'some' influence on the AO/NAO state, and possible development of HL blocking. Trending negative heading into Fall and winter is considered favorable. How much of a correlation there is seems debatable from what I have read, and some forecasters don't pay much attention to it.

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14 minutes ago, dailylurker said:

After last year I have a hard time getting excited about blocking lol

The glass half full view of last winter is to imagine a +AO/NAO with the Pac pattern the same. Might have seen little to no frozen for the coastal plain for the second year in a row instead of somewhat respectable median snowfall.

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