CONTEST STATUS - Updated: THU ... 31-OCT-19 @ 12:16 PM EDT

Winter '19 / '20 - Snowfall Forecast Contests
21st Annual 'Regular Season' Snowfall Forecast Contest
Contest starts once the flakes start a'flyin'

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19th Annual 'Season-total' Snowfall Forecast Contest
Deadline for entries: 11:59 PM EST ... SAT ... 30-NOV-19
Verification period: 01-DEC-19 through 31-MAR-20
Details here

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

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

Sunday, October 20, 2019

Winter '19 / '20 - What Is the Polar Vortex and How Does It Influence Weather?

"The term polar vortex has become part of the everyday vocabulary after the widespread media coverage of the extreme cold events over the United States during the early winter of 2014.

"However, there is some confusion in the media, general public, and even within the science community regarding what polar vortices are and how they are related to various weather events."
[...]
"... since surface weather disturbances are associated only with displacements of the vortex edge in limited areas rather than hemispheric-scale changes to the vortex, it is not clear ... invoking the term vortex clarifies anything, given ... the vortex is a hemispheric-scale structure.

"Use of the term without adequate explanation can suggest a more dramatic change to the global tropospheric circulation than has actually occurred (e.g., “The polar vortex is back!”)."

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Learn more about the PV from the full article courtesy the Bulletin of the American Meteorological Society (BAMS) here.

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