02-10-2017 13:55 PM
Strong & Violent tornadoes have F3 and greater damage ratings on the original Fujita Scale. A multi-tab visualization suite is provided for US and Canadian Strong & Violent tornadoes, using separate source, non-common datasets.
One tab is dedicated to interactively map the starting locations for individual events, while additional tabs provide interactive seasonal and annual summaries.
DATA SOURCES & DATA PREP
Publically available Environment Canada & US Storm Prediction Center historical tornado datasets are used where years overlap (1980-2009). Both datasets were wrangled to ensure common element type & form, and to add fields that support lookup tables to drive user interactivity and cross-filtering. Various DAX Measures were created to support a range of dynamic calculations.
User Slicer, Legend, and Visualization Element mouse selections drive cross-filtering and dynamic calculations on all tabs. Users can also filter by Country.
Users can mouse over/click on any bubble for more event details with tooltips and in the Matrix visualization.
The visualizations reveal: