![](https://media.cocorahs.org/images/wxbanner.png) Webinar #72 - Wednesday, October 15, 2020
Awesome or Awful? Ranking Winter Severity with the Accumulated Winter Season Severity Index (AWSSI) Barb Boustead NOAA/NWS’s Warning Decision Training Division Norman, OK
![](https://media.cocorahs.org/images/boustead150.jpg) (biography)
This webinar will look at the Accumulated Winter Season Severity Index (AWSSI). AWSSI provides a scientific way to quantify the severity of a winter at any given location compared to its weather history. Using daily temperature, snowfall, and snow depth measurements, the AWSSI assigns a point total to each day of winter. Daily points add up through the winter season, giving a whole-season total at the end of winter. Besides the curiosity factor of having the numbers to support perceptions of whether a winter was severe or mild, AWSSI can be used to compare severity among sites or to compare the severity of one winter to others at a given site. The index can provide insight into wildlife and vegetation patterns, transportation and education impacts, and relationships between winter severity and other weather and climate patterns.
![](https://media.cocorahs.org/images/BousteadScreen200.png)
View the Webinar by clicking here: AWSSI
View Barb's presentation slides
Resources:
AWSSI main page Wilder Weather Blog Medium Site Wilder Weather on Facebook ”The Long Winter of 1880-1881” in the Bulletin of the AMS
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