The heavy snowfall of late December scored a 4.92 on the Northeastern Snowfall Impact Scale (NESIS). It ranked 59th out of 76 events.
How often can a storm of this impact be expected to affect the NE?
Plotting the Gumbel distribution curve for the 76 NESIS events...we can estimate the return period of a 4.92 magnitude snow storm as 3.72 years.
What about the estimated return periods for the 'Top-5' NESIS storms?
Was the March-93 'Superstorm' really the 'Storm of the Century?' The Great Blizzard of JAN-96...ranked 2nd highest NESIS...was another memorable storm of the late 20th century.
How often can storms of such extreme impact be expected?
'Top-5' NESIS Events and Index...
|Gumbel distribution for 76 NESIS events|
The return period for the MAR-93 Superstorm is more than twice as long as its nearest neighbor...the Great Blizzard of JAN-96. Consider yourself lucky to have been alive when these genuinely historic storms occurred b/c it'll likely be a long...long time before a snow storm will have such a severe impact on the NE again.