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GENERAL INFORMATION
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1. Title of Dataset: Regina Tornado Scenario Windspeed Maps


2. Authors: Keith Alan Porter
            

3. Contact information: keith.porter@colorado.edu


4. Date of data collection: November 2025


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SHARING/ACCESS INFORMATION
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1. Licenses/restrictions placed on the data: Creative Commons Attribution Sharealike 4.0 International


2. Links to publications that cite or use the data:


3. Links to other publicly accessible locations of the data:


4. Recommended citation for the data: Porter, K.A. (2026). Regina Tornado Scenario Windspeed Maps. https://doi.org/10.25810/d0qa-2f46


5. Associated article(s): Porter, K.A. (2026). Regina Tornado Scenario Windspeeds. Institute for Catastrophic Loss Reduction, Toronto ON, Canada, 17 pp.

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DATA & FILE OVERVIEW
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1. File List:

   A. Filename: Porter-2026-01-16-Regina-tornado-scenario.kmz

This Keyhole Markup Language Zipped (.kmz) file can be opened in Google Earth. It contains the tornado path, windspeed bands, photos of damage in the 1912 Regina Cyclone, and contemporary maps from 1912 indicating the damage swath.
        
   B. Filename: Porter-2026-01-01-Regina-tornado-windspeed-legend.png

This portable networks graphic (PNG) image provides the legend of the windspeed bands shown in the .kmz file.


2. Relationship between files:       

The PDF file explains why and how the .kmz file was created. The .png file explains the meaning of the colors in the image of windspeed bands appearing in the .kmz file. 

3. Software-specific information:

	.kmz files can be opened with Google Earth
		Note: Historical photos will not work if you open the .kmz file in the web browser-based version of Google Earth. You will need to download Google Earth Pro from https://www.google.com/earth/about/versions/#earth-pro.
	.png files can be opened with most image viewers


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DATA-SPECIFIC INFORMATION FOR: Porter-2026-01-01-Regina-tornado-scenario.kmz
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1. Number of variables: 7

2. Number of cases/rows: 23

3. Variable List:
	A. Name: ID
	   Description: An integer index for a point on the track followed by the center of the vortex of a hypothetical but realistic scenario tornado striking Regina, Saskatchewan.

	B. Name: Longitude
	   Description: Longitude decimal degrees east for the location indexed by ID

        C. Name: Latitude 
       	   Description: Latitude decimal degrees north for the location indexed by ID

        D. Name: EF
       	   Description: Enhanced Fujita Scale rating for the tornado at location indexed by ID

        E. Name: width, km
       	   Description: Width of the tornado at location indexed by ID

        F. Name: Distance, km
       	   Description: Distance travelled by the tornado when it reaches the location indexed by ID

        G. Name: Time
       	   Description: Time at which the tornado is imagined to reach the location indexed by ID


4. Data codes (e.g., N/A = Not applicable): N/A

5. Other info:
	 Windspeed map colors reflect bands of 3-second peak gust velocity that align with the Enhanced Fujita (EF) scale.
		White means 28-38 m/s (EF0).
		Green means 38-50 m/s (EF1).
		Yellow reflects 50-61 m/s (EF2).
		Red means 61-74 m/s (EF3).
		Burnt (hex color #74021a) reflects 74-91 m/s (EF4-EF5).