CONTEST STATUS - Updated: SAT ... 11-APR-20 @ 8:30 PM EST

Winter '19 / '20 - Snowfall Forecast Contests
21st Annual 'Snow Storm' Snowfall Forecast Contest
Season ended as quickly as it started.
No winner this go'round ... too few storms (minimum of three required)

Snow Storm #1 (01-DEC-19)
FINAL Results here

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19th Annual 'Season-total' Snowfall Forecast Contest
FINAL Results here

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Winter '18 / '19 - Snowfall Forecast Contests
20th Annual 'Snow Storm' Snowfall Forecast Contest
FINAL Results here

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18th Annual 'Season-total' Snowfall Forecast Contest
FINAL Results here
Forecaster verification table here

Saturday, April 6, 2013

Winter '12 / '13 - Arctic Oscillation: New Record for March



Rockefeller Center - NYC
09-FEB-69
(FEB-69 AO:  -1.325; MAR-69 AO:  -2.084)
 The MAR-13 AO of -3.176 crushes the old record of -2.848 set 51 years ago in 1962.

The last time the March AO went below -1 was in 2006.

The last time the March AO tanked below -2 was in 1984.

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The AO for the preceding meteorological winter (D-J-F) averaged -1.122.

The AO/s 5-year moving average during meteorological winter is -0.909

The AO during meteorological winter has been negative...
....four of the last five seasons (average = -0.413)
...nine of the last 10 seasons (average = -0.368)
...12 of the last 15 seasons (average = -0.255)

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Not that any of these trends are abnormal.
The 5-year moving average was negative during the vast majority of the time between mid-50s to late '80s.  The abnormal 'positive ' period occurred between 1989 and 1996.

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Monthly AO data here.

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