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NYC winters during + enso years


uncle W

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snowy years...December to March...

year.......snowfall.......temperature..precipitation...*= 10" snowfalls

2009-10.......51.4".......37.4.......26.73" ***

2004-05.......41.0".......36.4.......16.31" *

2003-04.......42.6".......35.2.......13.22" **

2002-03.......49.3".......34.2.......15.49" *

1993-94.......53.4".......33.6.......20.34" *

1977-78.......50.7".......32.5.......17.65" **

1968-69.......30.2".......34.7.......12.03" *

1963-64.......44.7".......35.7.......12.43" *

1957-58.......44.7".......35.0.......16.60" *

middle years................................................................................

1951-52.......19.7".......37.8.......14.21"

1965-66.......21.4".......37.6.......10.25"

1969-70.......25.6".......32.6.......16.43"

1976-77.......24.5".......33.1.......14.46"

1982-83.......27.2".......39.4.......20.24" *

1986-87.......23.1".......37.4.......17.91"

1987-88.......19.1".......36.9.......14.99"

1990-91.......24.9".......40.5.......16.89"

1992-93.......24.5".......36.2.......18.39" *

least snowy.......................................................................................

1952-53.......15.1".......39.5.......20.15"

1953-54.......15.8".......38.5.......11.13"

1958-59.......13.0".......33.2.........9.05"

1972-73.........2.8".......38.2.......18.77"

1979-80.......12.8".......36.9.......15.86"

1991-92.......12.6".......37.9.......11.89"

1994-95.......11.8".......39.1.......14.92" *

1997-98.........5.5".......41.1.......20.36"

2006-07.......12.4".......37.9.......13.13"

averages............................................................................................

snowiest......45.3".......35.0.......16.60"

mid years.....23.3".......36.8.......15.97"

low years.....11.3".......38.0.......15.03"

27 yr --

average.......26.6".......36.6.......15.87"

1870-2011--

LT Ave.........28.4".......35.2.......14.40"

The nine snowiest winters were colder and wetter on average...the next nine were milder and drier on average...The bottom nine were the mildest and driest on average...

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What would the snowfall numbers look like when looking at only weak Ninos?

weak nino's less than 1.0 on the ONI scale...

1952-53...15.1"

1953-54...15.8"

1958-59...13.0"

1969-70...25.6"

1976-77...24.5"

1977-78...50.7"

2004-05...41.0"

ave..........26.5"

...............................

weak + neutral

1979-80...12.8"

1990-91...24.9"

1993-94...53.4"

1992-93...24.5"

2003-04...42.6"

ave..........31.6"

four great winters...

four mediocre...

four duds...

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weak nino's less than 1.0 on the ONI scale...

1952-53...15.1"

1953-54...15.8"

1958-59...13.0"

1969-70...25.6"

1976-77...24.5"

1977-78...50.7"

2004-05...41.0"

ave..........26.5"

...............................

weak + neutral

1979-80...12.8"

1990-91...24.9"

1993-94...53.4"

1992-93...24.5"

2003-04...42.6"

ave..........31.6"

four great winters...

four mediocre...

four duds...

Thanks uncle. Looks like this year will be a roll of the dice...

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I wish your stats leaned a certain way but it's split perfectly three ways :lol: Hopefully there will be increased blocking due to the conditions the Arctic is experiencing.

we are going to need cold air if we want a great winter with precipitation above average...the top nine years had a great storm track at times...besides one or two big hits there were many mid size storms mixed in...

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I added the arctic oscillation to these analogs...

snowy years...AO monthly ave December to March...

year..........snowfall.......Dec.......Jan.........Feb........Mar....... ave

2009-10.......51.4".......-3.413... -2.587... -4.226... -0.432... -2.664

2004-05.......41.0"......+1.230...+0.356... -1.271... -1.348... -0.258

2003-04.......42.6"......+0.265... -1.686... -1.528...+0.318... -0.658

2002-03.......49.3".......-1.592... -0.472...+0.128...+0.933... -0.251

1993-94.......53.4".......-0.104... -0.288... -0.862...+1.881...+0.157

1977-78.......50.7".......-0.240... -0.347... -3.014...+0.502... -0.800

1968-69.......30.2".......-0.783... -2.967... -3.114... -1.582... -2.112

1963-64.......44.7".......-1.178...+0.385... -0.575... -0.558... -0.482

1957-58.......44.7"......+0.828... -1.438... -2.228... -2.522... -1.340...nine year average...-0.934

middle years................................................................................

1951-52.......19.7"......+1.987...+0.368... -1.747... -1.859... -0.313

1965-66.......21.4"......+0.163... -3.232... -1.438... -0.911... -1.357

1969-70.......25.6".......-1.856... -2.412... -1.325... -2.084... -1.919

1976-77.......24.5".......-2.074... -3.767... -2.010...+0.344... -1.877

1982-83.......27.2"......+0.967...+1.359... -1.806... -0.567... -0.012

1986-87.......23.1"......+0.060... -1.148... -1.473... -1.746... -1.077

1987-88.......19.1".......-0.534...+0.265... -1.066... -0.197... -0.383

1990-91.......24.9"......+1.277...+0.723... -0.876... -0.527...+0.149

1992-93.......24.5"......+1.627...+3.495...+0.184...+0.764...+1.518...nine year average...-0.586

least snowy.......................................................................................

1952-53.......15.1".......-1.827... -1.036... -0.249...+1.068... -0.511

1953-54.......15.8"......+0.575... -0.148... -0.181...+0.246...+0.181

1958-59.......13.0"...... -1.687... -2.013...+2.544...+1.442...+0.072

1972-73.........2.8"......+1.238...+1.232...+0.786...+0.537...+0.948

1979-80.......12.8"......+1.295... -2.066... -0.934... -1.433... -0.787

1991-92.......12.6"......+1.613...+0.550...+1.222...+0.984...+1.067

1994-95.......11.8"......+0.894... -0.154...+1.429...+0.393...+0.641

1997-98.........5.5".......-0.071... -2.081... -0.183... -0.254... -0.647

2006-07.......12.4"......+2.282...+2.034... -1.307...+1.182...+1.048...nine year average...+0.212

as expected the snowier the winter the lower the AO index on average...

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analogs PDO index...

season......Dec...Jan...Feb...Ave...

1951-52...-1.68...-2.01...-0.46...-1.38

1952-53....0.04...-0.57...-0.07...-0.20

1953-54....0.07...-1.32...-1.61...-0.95

1957-58...-0.55....0.25....0.62....0.11

1958-59....0.86....0.69...-0.43....0.37

1963-64...-1.08....0.01...-0.21...-0.43

1965-66...-0.03...-0.82...-0.03...-0.26

1968-69...-1.27...-1.26...-0.95...-1.16

1969-70....1.38....0.61....0.43....0.81

1972-73...-0.33...-0.46...-0.61...-0.47

1976-77....1.22....1.65....1.11....1.48

1977-78...-0.69....0.34....1.34....0.33

1979-80...-0.42...-0.11....1.32....0.26

1982-83...-0.25....0.56....1.14....0.48

1986-87....1.77....1.88....2.10....1.92

1987-88....1.27....0.93....1.24....1.15

1990-91...-2.23...-2.02...-1.19...-1.81

1991-92....0.09....0.05....0.31....0.15

1992-93....0.53....0.05....0.19....0.26

1993-94....1.07....1.21....0.39....0.96

1994-95...-1.79...-0.49....0.46...-0.61

1997-98....0.67....0.83....1.56....1.02

2002-03....2.10....2.09....1.75....1.98

2003-04....0.33....0.43....0.48....0.44

2004-05...-0.17....0.44....0.81....0.36

2006-07....0.14....0.01....0.04....0.06

2009-10....0.08....0.83....0.44....0.45

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  • 3 weeks later...

it looks like a plus enso year isn't etched in stone...It looks like a neutral + or minus winter coming up...I'm no expert on the subject but that won't stop me lol...Here are the ONI years with a +0.2 to - 0.2 index for DJF...

season ave. temp. coldest 30 days. coldest winter temp. precipitation and snowfall Dec-Mar...snowfall and biggest snowfall...

1959-60...36.2...30.3.....9...14.43"...39.2"...14.5"

1960-61...31.7...24.6....-2...13.11"...54.7"...17.7"

1961-62...33.3...30.9.....4...12.37"...18.1".....6.2"

1978-79...32.7...26.0.....0...25.11"...29.4"...12.7"

1981-82...32.6...25.2.....0...16.57"...24.6".....9.6"

1989-90...35.7...25.3.....6...12.14"...13.4".....4.7"

1992-93...35.0...31.0.....7...18.39"...24.6"...10.2"

1993-94...31.2...23.5....-2...20.24"...53.4"...12.8"

2001-02...41.5...35.4...19.....8.44".....3.5".....3.0"

avweage. 34.4...28.0.....5...16.64"...29.0"...10.2"

long term-

average...33.4...28.0.....4...14.30"...28.4"............

two great winters...1960-61 and 1993-94...

two very good winters...1959-60 and 1992-93...

two good winters...1981-82 and 1978-79...

one mediocre winter...1961-62...

one bad winter...1989-90...

one horrilbe winter...2001-02...

five of the nine winters had major storms 10" or more...Seven of nine 6" or more...Three winters had above average snowfall...another three had near average snowfall...Three had below average snowfall...five of the nine winters had below average temperatures...five had a very cold 30 day period 26.0 degrees or lower...one year 2001-02's coldest 30 days averaged a mild 35.4...Chances are slightly better than 66% we will see a good winter this year for these analogs...It could be great or horrible...you decide lol...

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it looks like a plus enso year isn't etched in stone...It looks like a neutral + or minus winter coming up...I'm no expert on the subject but that won't stop me lol...Here are the ONI years with a +0.2 to - 0.2 index for DJF...

season ave. temp. coldest 30 days. coldest winter temp. precipitation and snowfall Dec-Mar...snowfall and biggest snowfall...

1959-60...36.2...30.3.....9...14.43"...39.2"...14.5"

1960-61...31.7...24.6....-2...13.11"...54.7"...17.7"

1961-62...33.3...30.9.....4...12.37"...18.1".....6.2"

1978-79...32.7...26.0.....0...25.11"...29.4"...12.7"

1981-82...32.6...25.2.....0...16.57"...24.6".....9.6"

1989-90...35.7...25.3.....6...12.14"...13.4".....4.7"

1992-93...35.0...31.0.....7...18.39"...24.6"...10.2"

1993-94...31.2...23.5....-2...20.24"...53.4"...12.8"

2001-02...41.5...35.4...19.....8.44".....3.5".....3.0"

long term-

average...33.4...28.0.....4...14.30"...28.4"............

two great winters...1960-61 and 1993-94...

two very good winters...1959-60 and 1992-93...

two good winters...1981-82 and 1978-79...

one mediocre winter...1961-62...

one bad winter...1989-90...

one horrilbe winter...2001-02...

five of the nine winters had major storms 10" or more...Seven of nine 6" or more...Three winters had above average snowfall...another three had near average snowfall...Three had below average snowfall...five of the nine winters had below average temperatures...five had a very cold 30 day period 26.0 degrees or lower...one year 2001-02's coldest 30 days averaged a mild 35.4...Chances are slightly better than 66% we will see a good winter this year for these analogs...It could be great or horrible...you decide lol...

Which winters on that list followed a La Nina the winter before? Also which on the list followed a two year La Nina like this one would? I know 2001-02 did.

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Which winters on that list followed a La Nina the winter before? Also which on the list followed a two year La Nina like this one would? I know 2001-02 did.

2001-02 followed three la nina years...it was a weak negative...

1959-60....-0.1 DJF

1960-61.....0.0

1961-62....-0.2

1978-79....-0.1

1981-82....-0.1

1989-90.....0.1

1992-93.....0.2

1993-94.....0.1

2001-02....-0.2

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2001-02 followed three la nina years...it was a weak negative...

1959-60....-0.1 DJF

1960-61.....0.0

1961-62....-0.2

1978-79....-0.1

1981-82....-0.1

1989-90.....0.1

1992-93.....0.2

1993-94.....0.1

2001-02....-0.2

So wow it looks like every one of the years you listed followed either one or multiple prior La Nina winters.

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neutral MEI years with a Jan/Feb index between -0.400 and +0.400...

1952-53..+0.380

1953-54...-0.019

1956-57...-0.352+

1959-60...-0.261*

1960-61...-0.266*

1964-65...-0.323+

1976-77..+0.254+

1978-79..+0.363*

1980-81...-0.164

1981-82...-0.148+

1985-86...-0.195

1990-91..+0.309+

1993-94..+0.192*

2001-02...-0.208

2003-04..+0.329*

*Five winters with above average snowfall...

+five winters with near average snowfall...

five winters with below average snowfall...

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