NYC -AO 6 Inch Or Greater Snowstorm Climatology Of The Last 50 Years

[bluewave]

The key daily -AO reading to watch for a window of 6 inch or greater NYC snowstorm 

potential to open is -1.500. All -AO drops to or below this level weren't followed

by 6 inch or greater snowstorm in NYC. But 90% of these events followed

a -1.500 or lower -AO reading by days to as much as a month. So 48 of the

last 53 events in NYC followed this pattern. But there were still 5 events or about 10% of

the total that were able to occur in the last 50 years without a strong -AO drop first happening.

There were numerous snowfall events under 6 inches that weren't preceded 

by a strong daily -AO fall. So this thread is primarily looking at the more 

memorable snowstorms of the last 50 years in NYC.

 

All 6 inch or greater NYC snowstorms of the last 50 years and lowest -AO

reading before the storm:

 

February 13-14, 2014.....12.5........1-27......-2.605

February 2-3, 2014.........8.0..........1-27......-2.605

January 21-22, 2014......11.5........1-19.......-2.426

January 3, 2014.............6.4...........1-1........-1.558

February 8-9,2013.........11.4..........1-22......-2.744

January 26-27,2011.......19.0.........1-22.......-2.411

January 11-12, 2011......9.1...........1-11.......-3.806

December 26-27, 2010..20.0.........12-18.....-5.265

February 25-27, 2010....20.9..........2-14.......-5.132

February 10, 2010.........10.0..........2-6..........-5.205

December 19-20, 2009..10.9.........12-20.......-5.341

March 2, 2009................8.3............2-14........-2.436

February 22, 2008..........6.0...........2-11.........-1.645

February 11, 2006..........26.9.........2-3...........-2.729

February 28-3-1, 2005....7.7..........2-26..........-4.337

February 24-25, 2005.....6.0..........2-24...........-3.221

January 22-23, 2005......13.8........1-22............-2.621

January 27-28, 2004......10.3........1-27............-3.012

December 5-7, 2003......14.0........11-15.........-0.382

February 16-17, 2003.....19.8.......1-22...........-3.575

December 5, 2002..........6.0.........11-24.........-3.455

January 21, 2001............6.0.........12-29.........-4.688

December 30, 2000.......12.0........12-29.........-4.688

February 16-17,1996......10.7.........1-25.........-3.607

February, 2-3, 1996........7.1...........1-25.........-3.607

January 7-8, 1996..........20.2.........12-19........-4.353

December 19-20,1995....7.7...........12-19........-4.353

February 4, 1995.............10.8.........1-26..........-1.443

February 11, 1994..........12.8..........1-10..........-3.073

February 8-9, 1994..........9.0...........1-10..........-3.073

March 13-14, 1993..........10.6.........3-2............-2.288

March 19, 1992................6.2..........3-6.............0.479

December 26-27, 1990....7.2..........12-7..........-0.418

January 22, 1987.............8.1...........1-6............-2.682

March 8-9, 1984..............6.9...........3-7............-2.168

February 11-12, 1983......17.6.........2-6............-3.410

April 6, 1982.....................9.6..........3-16...........-2.286

March 5, 1981..................8.6..........3-4.............-4.318

February 19, 1979...........12.7.........1-25...........-4.387

February 5, 1978............17.7..........2-5............-5.291

January 19-20, 1978.......13.6.........12-21.........-2-274

February 12, 1975...........7.8...........2-8.............-1.545

February 8-9, 1974.........6.0............2-7.............-2.431

January 1, 1971..............6.4...........12-29..........-2.530

December 25-26, 1969...6.8...........12-17..........-2.983

February 9-10, 1969.......15.3..........2-8..............-3.448

February 29-3-1, 1968....6.6............2-20............-3.345

March 22, 1967...............9.0............2-25...........-0.282

February 6-7,1967..........12.5...........1-29...........-2.225

December 24-25, 1966....7.1..........12-13..........-4.147

February 25-26, 1966......6.3...........1-28............-5.130

January 29-30, 1966.......6.8...........1-28............-5.130

January 10, 1965............6.3............1-3..............-2.986

 

http://ftp.cpc.ncep.noaa.gov/cwlinks/

 

http://www.weather.gov/media/okx/Climate/CentralPark/sixplussnow.pdf

 

http://www.ncdc.noaa.gov/IPS/lcd/lcd.html?_page=1&state=NY&stationID=94728&_target2=Next+%3E

[uncle W]

Feb. 6-7, 1967 is missing...I think it was negative and falling at the time...

[bluewave]

Feb. 6-7, 1967 is missing...I think it was negative and falling at the time...

 

Thanks for pointing that one out. There was 12.5 inches at NYC after the AO dropped to -2.225 on 1-29.

I had it in my notes but it didn't make it into the post.

[uncle W]

Thanks for pointing that one out. There was 12.5 inches at NYC after the AO dropped to -2.225 on 1-29.

I had it in my notes but it didn't make it into the post.

that usually happens to me too...The ao and nao forecast is to drop from the high levels it's at now...the ao is above *3 and nao is way up there today...it has no where to go but down...How far down is the question?...If it does dive as forcast I will look for a storm, cold wave or both after the minimum...

[uncle W]

of the 33 10" snowstorms since 1949 20 had a -ao on the date of the storm...25 had a +pna...17 had a -nao...ten had the -ao +pna and -nao trifecta...two were +ao/nao and -pna...

snowstorm...date......AO......PNA......NAO......Enso/MEI....
12" 03/18/1956....0.470....0.186.....-0.225.....La Nina
12" 03/20/1958...-2.522....0.067.....-0.830.....El Nino
14" 12/21/1959....1.266....0.114......1.032.....Neutral-
15" 03/03/1960...-1.265...-0.834......0.249.....Neutral-
15" 12/11/1960...-0.343....1.527.....-0.316.....Neutral-
10" 01/19/1961...-1.506....1.587......0.392.....Neutral-
18" 02/03/1961....0.621....0.489.....-0.126.....Neutral-
13" 01/12/1964....0.385....0.654.....-1.180.....Weak El Nino
15" 02/06/1967....1.180....0.732......0.230.....Weak La Nina
15" 02/09/1969...-3.114...-0.325......0.044.....Weak El Nino
14" 01/19/1978...-0.347....0.262......0.230.....Weak El Nino
18" 02/06/1978...-3.014....1.188.....-0.093.....Weak El Nino
13" 02/19/1979...-0.697...-0.042......0.254.....Neutral+
18" 02/11/1983...-1.806....0.845.....-0.567.....El Nino
10" 03/13/1993....0.764...-0.179......0.472.....Weak El Nino
13" 02/11/1994...-0.862...-0.454......0.927.....Neutral+
11" 02/04/1995....1.429....1.604......0.437.....El Nino
20" 01/08/1996...-1.200....0.447.....-0.392.....Weak La Nina
11" 02/16/1996....0.163...-0.421......0.534.....Weak La Nina
12" 12/30/2000...-2.354....1.075.....-0.537.....Weak La Nina
20" 02/16/2003....0.128....0.681......0.836.....El Nino
14" 12/05/2003....0.265....0.784.....-0.197.....Neutral+
10" 01/25/2004...-1.686....0.164.....-0.541.....Neutral+
14" 01/25/2005....0.356....1.098.....-0.035.....El Nino
27" 02/11/2006...-0.156....1.658......0.136.....Neutral-
11" 12/19/2009...-3.413....0.549.....-1.833.....El Nino
10" 02/09/2010...-4.266....0.622.....-1.136.....El Nino
21" 02/25/2010...-3.818....0.087.....-0.219.....El Nino
20" 12/26/2010...-2.631...-0.284.....-0.834.....La Nina
19" 01/26/2011...-1.683....1.233.....-0.142.....La Nina

11" 02/09/2013...-0.700....0.403......0.219.....neutral-

11" 01/21/2014...-1.843....1.172......0.137.....neutral-

10" 02/13/2014....0.182...-1.097......0.690.....neutral-

[bluewave]

of the 33 10" snowstorms since 1949 20 had a -ao on the date of the storm...25 had a +pna...17 had a -nao...ten had the -ao +pna and -nao trifecta...two were +ao/nao and -pna...

 

 

It's interesting that the early December 2003 event was the only 12.0" or greater snowstorm for NYC

since 1965 which didn't follow a -1.500 AO drop.

 

Lowest -AO readings leading up to NYC 12"or greater snowstorms since 1965:

 

 

February 13-14, 2014.....12.5........1-27......-2.605

January 26-27,2011.......19.0.........1-22.......-2.411

December 26-27, 2010..20.0.........12-18.....-5.265

February 25-27, 2010....20.9..........2-14.......-5.132

February 11, 2006..........26.9.........2-3...........-2.729

January 22-23, 2005......13.8........1-22............-2.621

December 5-7, 2003......14.0........11-15.........-0.382

February 16-17, 2003.....19.8.......1-22...........-3.575

December 30, 2000.......12.0........12-29.........-4.688

January 7-8, 1996..........20.2.........12-19........-4.353

February 11, 1994..........12.8..........1-10..........-3.073

February 11-12, 1983......17.6.........2-6............-3.410

February 19, 1979...........12.7.........1-25...........-4.387

February 5, 1978............17.7..........2-5............-5.291

January 19-20, 1978.......13.6.........12-21.........-2-274

February 9-10, 1969.......15.3..........2-8..............-3.448

February 6-7,1967..........12.5...........1-29...........-2.225

 

http://www.weather.gov/media/okx/Climate/CentralPark/BiggestSnowstorms.pdf

 

Top 10 snowstorms in NYC since 1950 and the lowest AO reading before and during the event

 

Top 10 NYC snowstorms since 1950....lowest AO reading before...........AO reading during 

 

26.9.....February 11-12, 2006..........12/05...-3.569...2/3...-2.729.....2/11...-0.175...2/12...+0.264

20.9.....February 25-26, 2010..........12/21...-5.821...2/6...-5.205....2/25...-3.818....2/26..-3.230

20.2.....January 7-8, 1996................12/19...-4.353.........................1/7...-1.094......1/8....-0.104

20.0.....December 26-27, 2010........12/18...-5.265......................12/26...-2.886...12/27...-2.532

19.8...  February 16-17, 2003..........1/22......-3.575......................2/16.....+0.438...2/17....+0.675

19.0.....January 26-27, 2011............12/21.-5.821.1/11..-3.806.1/22.-2.411.1/26..-0.142.1/27+0.028

17.7.....February 5-7, 1978.....................................................2/5...-5.291...2/6...-5.026...2/7...-4.474

17.6.....February11-12, 1983...........2/6....-3.410............................2/11....-1.973...2/12...-1.062

17.4.....February 3-4, 1961..............1/21...-2.495...........................2/3.....+0.056...2/4...+0.057

15.3....February 9-10, 1969.............1/10...-4.785...........................2/9...-3.148....2/10...-3.081

[Rjay]

Bluewave/Don/Ucle the ao is forecasted to be positive for this storm correct? Using the CPC charts it's looks to be so. If so this is very unprecedented.

(Posted in the wrong thread originally)

[uncle W]

Bluewave/Don/Ucle the ao is forecasted to be positive for this storm correct? Using the CPC charts it's looks to be so. If so this is very unprecedented.

(Posted in the wrong thread originally)

most had a plus pna...Feb. 67 had a plus ao/nao and a plus pna...

[bluewave]

Bluewave/Don/Ucle the ao is forecasted to be positive for this storm correct? Using the CPC charts it's looks to be so. If so this is very unprecedented.

(Posted in the wrong thread originally)

 

As it turns out, the AO being in such a positive state worked against a top ten heaviest snowfall outcome for NYC since 1950.

The AO spiked to around  +2.0 today and only fell to around -1.6 on the season before

this storm. Notice how much more negative the AO was preceding and during the 

the other top ten events in NYC since 1950 compared to this one.

 

 

Top 10 snowstorms in NYC since 1950 and the lowest AO reading before and during the event

 

Top 10 NYC snowstorms since 1950....lowest AO reading before...........AO reading during 

 

26.9.....February 11-12, 2006..........12/05...-3.569...2/3...-2.729.....2/11...-0.175...2/12...+0.264

20.9.....February 25-26, 2010..........12/21...-5.821...2/6...-5.205....2/25...-3.818....2/26..-3.230

20.2.....January 7-8, 1996................12/19...-4.353.........................1/7...-1.094......1/8....-0.104

20.0.....December 26-27, 2010........12/18...-5.265......................12/26...-2.886...12/27...-2.532

19.8...  February 16-17, 2003..........1/22......-3.575......................2/16.....+0.438...2/17....+0.675

19.0.....January 26-27, 2011............12/21.-5.821.1/11..-3.806.1/22.-2.411.1/26..-0.142.1/27+0.028

17.7.....February 5-7, 1978.....................................................2/5...-5.291...2/6...-5.026...2/7...-4.474

17.6.....February11-12, 1983...........2/6....-3.410............................2/11....-1.973...2/12...-1.062

17.4.....February 3-4, 1961..............1/21...-2.495...........................2/3.....+0.056...2/4...+0.057

15.3....February 9-10, 1969.............1/10...-4.785...........................2/9...-3.148....2/10...-3.081

[bluewave]

most had a plus pna...Feb. 67 had a plus ao/nao and a plus pna...

 

Central Park getting a 6 inch or a little greater snowfall from this storm matches the other cases where it occured

after a -1.5 AO drop that we had recently. But it was tough to do much more than that due to the close to

+2 reading today.

[uncle W]

the ao/nao is about as high as the 12/22/59 storm...that storm had winners and losers also...Feb. 67 maybe...Otherwise this storm is unusual for a high ao/nao period...Getting a snowstorm about a week before or after the ao minimum for the winter is not unusual...The question is did we see the ao minimum already...

[bluewave]

the ao/nao is about as high as the 12/22/59 storm...that storm had winners and losers also...Feb. 67 maybe...Otherwise this storm is unusual for a high ao/nao period...Getting a snowstorm about a week before or after the ao minimum for the winter is not unusual...The question is did we see the ao minimum already...

 

 

This winter is already unusual in that we have not had a -2 or lower daily AO reading from 12/1/-1/25.

It will be only the 12th winter since 1950 without the AO reaching -2 or lower by 1/25.

 

Latest first -2 or lower winter (DJF) AO readings since 1950:

 

06-07.......2/4

99-00.......2/18

98-99.......1/31

94-95.......3/7

92-93.......3/2

90-91.......2/8

88-89.......4/18

82-83.......2/1

74-75.......3/28

71-72.......2/3

56-57.......2/13

 

 

[Isotherm]

Looks like NYC and LGA finished with 11-13" for this event. Very good storm considering the +AO during the event.

[bluewave]

Looks like NYC and LGA finished with 11-13" for this event. Very good storm considering the +AO during the event.

 

The 9.8" at Central Park was probably closest to the February 1995 analog for amounts and a +6"

event after the AO fell near -1.5 and steep rise. The AO dropped to -1.6 last week before rebounding to

around +2 today. That was also an El Nino winter with a nice storm that boosted NYC seasonal

snowfall into double digits after running below normal until that date.

 

..NEW YORK COUNTY...

CENTRAL PARK 9.8 100 PM 1/27 CENTRAL PARK ZOO

 

February 4, 1995.............10.8.........1-26..........-1.443

 

Daily AO data

 

1995 1 26 -1.443

1995 1 27 -1.272

1995 1 28 -0.853

1995 1 29 -0.557

1995 1 30 0.284

1995 1 31 1.444

1995 2 1 2.006

1995 2 2 2.369

1995 2 3 2.575

1995 2 4 2.328

 

[uncle W]

The 9.8" at Central Park was probably closest to the February 1995 analog for amounts and a +6"

event after the AO fell near -1.5 and steep rise. The AO dropped to -1.6 last week before rebounding to

around +2 today. That was also an El Nino winter with a nice storm that boosted NYC seasonal

snowfall into double digits after running below normal until that date.

 

..NEW YORK COUNTY...

CENTRAL PARK 9.8 100 PM 1/27 CENTRAL PARK ZOO

 

February 4, 1995.............10.8.........1-26..........-1.443

 

Daily AO data

 

1995 1 26 -1.443

1995 1 27 -1.272

1995 1 28 -0.853

1995 1 29 -0.557

1995 1 30 0.284

1995 1 31 1.444

1995 2 1 2.006

1995 2 2 2.369

1995 2 3 2.575

1995 2 4 2.328

 

ao.obs.gif

the 1995 storm had a plus pna going for it...We have one now and it will go negative briefly then rise again...

[bluewave]

the 1995 storm had a plus pna going for it...We have one now and it will go negative briefly then rise again...

 

 

It was a fast snowfall improvement for NYC over the last week or so. Only 3.2" on the season until the AO

dropped to -1.6 for the first time on 1/21/15. Since that recent AO drop NYC is up to 15.5" on the season.

[Kaner587]

My guess is we'll have a solid 30 day period averaging decent amount below normal (-3 to -4) and 20-30in snow. Uncle I know you always post stats about snowy/cold 30 day periods.

[uncle W]

My guess is we'll have a solid 30 day period averaging decent amount below normal (-3 to -4) and 20-30in snow. Uncle I know you always post stats about snowy/cold 30 day periods.

I doubt we top 42.1" in 30 days this year like we had last year...only Dec-Jan, 47-48 had more snow in 30 days...last years coldest 30 days averaged 28.5...just about average...This year could end up with a colder 30 day period...

[donsutherland1]

AO update...

 

Today is the 60th day of meteorological winter. The AO has averaged +0.779 to date for meteorological winter.Some additional statistics:

 

% Days > 0: 77%

% Days of +1 or Above: 40%

% Days of +2 or Above: 18%

 

% Days < 0: 23%

% Days of -1 or Below: 7%

 

For every day when the AO was < 0, there were approximately 1.7 days when it was +1 or above.

 

Maximum % Days < 0 (if all remaining days are < 0): 49%

 

Required Average from January 30-February 28 to achieve the following DJF Average:

 

+0.500: -0.057

0.000: -1.557

-0.500: -3.057

 

In sum, the majority of days this winter will have seen a positive AO. Even bringing the average to 0.000 is becoming increasingly unlikely. A winter average of -0.500 is very unlikely. An historic blocking episode would be required to bring the winter average to -1.000.

[uncle W]

AO update...

 

Today is the 60th day of meteorological winter. The AO has averaged +0.779 to date for meteorological winter.Some additional statistics:

 

% Days > 0: 77%

% Days of +1 or Above: 40%

% Days of +2 or Above: 18%

 

% Days < 0: 23%

% Days of -1 or Below: 7%

 

For every day when the AO was < 0, there were approximately 1.7 days when it was +1 or above.

 

Maximum % Days < 0 (if all remaining days are < 0): 49%

 

Required Average from January 30-February 28 to achieve the following DJF Average:

 

+0.500: -0.057

0.000: -1.557

-0.500: -3.057

 

In sum, the majority of days this winter will have seen a positive AO. Even bringing the average to 0.000 is becoming increasingly unlikely. A winter average of -0.500 is very unlikely. An historic blocking episode would be required to bring the winter average to -1.000.

I doubt the ao goes negative for a long stretch of time...It probably ends up averaging plus for the winter...But if it goes negative in February for a time more snow and or cold will come...the last two years with the -epo and plus pna we don't need a negative ao for cold...

[bluewave]

AO update...

 

Today is the 60th day of meteorological winter. The AO has averaged +0.779 to date for meteorological winter.Some additional statistics:

 

% Days > 0: 77%

% Days of +1 or Above: 40%

% Days of +2 or Above: 18%

 

% Days < 0: 23%

% Days of -1 or Below: 7%

 

For every day when the AO was < 0, there were approximately 1.7 days when it was +1 or above.

 

Maximum % Days < 0 (if all remaining days are < 0): 49%

 

Required Average from January 30-February 28 to achieve the following DJF Average:

 

+0.500: -0.057

0.000: -1.557

-0.500: -3.057

 

In sum, the majority of days this winter will have seen a positive AO. Even bringing the average to 0.000 is becoming increasingly unlikely. A winter average of -0.500 is very unlikely. An historic blocking episode would be required to bring the winter average to -1.000.

 

Great stats as usual, Don. The interesting thing about this +AO stretch and other recent ones is how quickly we

got the major snows when the AO finally droped. The historic early season snowstorm of 10-29-11 also occurred just

as the AO became negative after a long positive stretch.

 

2011 10 1 0.922

2011 10 2 1.287

2011 10 3 1.853

2011 10 4 2.241

2011 10 5 2.078

2011 10 6 1.849

2011 10 7 2.029

2011 10 8 2.121

2011 10 9 2.081

2011 10 10 1.763

2011 10 11 1.162

2011 10 12 0.820

2011 10 13 0.582

2011 10 14 0.224

2011 10 15 -0.015

2011 10 16 -0.022

2011 10 17 0.358

2011 10 18 0.640

2011 10 19 0.899

2011 10 20 0.842

2011 10 21 0.451

2011 10 22 0.269

2011 10 23 -0.274

2011 10 24 -0.666

2011 10 25 -0.898

2011 10 26 -1.203

2011 10 27 -1.098

2011 10 28 -0.263

2011 10 29 0.944

2011 10 30 1.462

2011 10 31 1.469

[donsutherland1]

Great stats as usual, Don. The interesting thing about this +AO stretch and other recent ones is how quickly we

got the major snows when the AO finally droped. The historic early season snowstorm of 10-29-11 also occurred just

as the AO became negative after a long positive stretch.

 

2011 10 1 0.922

2011 10 2 1.287

2011 10 3 1.853

2011 10 4 2.241

2011 10 5 2.078

2011 10 6 1.849

2011 10 7 2.029

2011 10 8 2.121

2011 10 9 2.081

2011 10 10 1.763

2011 10 11 1.162

2011 10 12 0.820

2011 10 13 0.582

2011 10 14 0.224

2011 10 15 -0.015

2011 10 16 -0.022

2011 10 17 0.358

2011 10 18 0.640

2011 10 19 0.899

2011 10 20 0.842

2011 10 21 0.451

2011 10 22 0.269

2011 10 23 -0.274

2011 10 24 -0.666

2011 10 25 -0.898

2011 10 26 -1.203

2011 10 27 -1.098

2011 10 28 -0.263

2011 10 29 0.944

2011 10 30 1.462

2011 10 31 1.469

Thanks for your kind words. I agree. with respect to the dips in the AO That's part of the reason I'm optimistic about the snowfall prospects through about February 10 while the subtropical jet is active..

[bluewave]

Thanks for your kind words. I agree. with respect to the dips in the AO That's part of the reason I'm optimistic about the snowfall prospects through about February 10 while the subtropical jet is active..

 

It looks like we have broken the greatest NYC January snowfall for such a high monthly AO level pending the final

numbers. The current 14.3" at Central Park appears to be the highest monthly accumulation for such a positive

January AO reading. The final monthly reading seems to be in the group of highest January AO readings since

1950 of +0.800 or greater. Do you have a final January AO average estimate from your data yet?

 

NYC January Snowfall with a monthly AO average of +0.800 or greater since 1950:

 

2015...14.3

2009...9.0

2008...T

2007...2.6

2002..3.5

2000...9.5

1993...1.5

1990...1.8

1989...5.0

1984...11.7

1983...1.9

1975...2.0

1973...1.8

1962...0.6

1957...8.9

[donsutherland1]

It looks like we have broken the greatest NYC January snowfall for such a high monthly AO level pending the final

numbers. The current 14.3" at Central Park appears to be the highest monthly accumulation for such a positive

January AO reading. The final monthly reading seems to be in the group of highest January AO readings since

1950 of +0.800 or greater. Do you have a final January AO average estimate from your data yet?

 

NYC January Snowfall with a monthly AO average of +0.800 or greater since 1950:

 

2014...14.3

2009...9.0

2008...T

2007...2.6

2002..3.5

2000...9.5

1993...1.5

1990...1.8

1989...5.0

1984...11.7

1983...1.9

1975...2.0

1973...1.8

1962...0.6

1957...8.9

January 2015 will likely finish somewhere between +1.15 +/- 0.05.

[Brian5671]

Thinking we can thank the -EPO for the record?

[donsutherland1]

Thinking we can thank the -EPO for the record?

And the PNA+.

[Isotherm]

We'll likely add another 1" or so to the January Central Park number w/ tomorrow morning's clipper. One also must look beyond the index values and at the 500mb pattern. The past two snow events featured some east based -NAO blocking and a ridge-bridge across the Arctic, even though the actual numbers didn't suggest a -AO/NAO during the event. 500mb anomalies are more important. The blocking was sufficient to slow down the upstream flow and aid in inducing a close-off at H5 east of New Jersey.

[uncle W]

It looks like we have broken the greatest NYC January snowfall for such a high monthly AO level pending the final

numbers. The current 14.3" at Central Park appears to be the highest monthly accumulation for such a positive

January AO reading. The final monthly reading seems to be in the group of highest January AO readings since

1950 of +0.800 or greater. Do you have a final January AO average estimate from your data yet?

 

NYC January Snowfall with a monthly AO average of +0.800 or greater since 1950:

 

2014...14.3

2009...9.0

2008...T

2007...2.6

2002..3.5

2000...9.5

1993...1.5

1990...1.8

1989...5.0

1984...11.7

1983...1.9

1975...2.0

1973...1.8

1962...0.6

1957...8.9

temperatures for those years...

2014...29.9 est...

2009...27.9

2008...36.5

2007...37.5

2002...39.9

2000...31.3

1993...36.3

1990...41.4

1989...37.4

1984...29.9

1983...34.5

1975...37.3

1973...35.5

1962...32.6

1957...28.5

the average is 34.4...about two degrees above average...snowfall average is 5"...below January average by 2-3"...

[bluewave]

temperatures for those years...

2014...29.9 est...

2009...27.9

2008...36.5

2007...37.5

2002...39.9

2000...31.3

1993...36.3

1990...41.4

1989...37.4

1984...29.9

1983...34.5

1975...37.3

1973...35.5

1962...32.6

1957...28.5

the average is 34.4...about two degrees above average...snowfall average is 5"...below January average by 2-3"...

 

Average January AO for the previous 16 Januaries with between 10-20" at Central Park  since 1950  -0.829.