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Greenfield Tornado

24 May 2024 05:30 AM
Yesterday's daily feature map of the Polk/Story Tornado Track from Tuesday was well received, so today's map shows the current and preliminary NWS track for the tornado that hit Greenfield, IA. The map combines NWS Tornado Warnings with the tornado track and attempts to assess lead time at one minute interval points along the track. There are caveats galore with this type of analysis as the algorithm assumes a constant ground speed and has a very rigid and binary spatial/temporal match between the track points and the polygons. For example, the x's indicate times that the tornado was temporally and spatially outside of the warning, but there was an active warning less than 0.5 miles to the west. Additionally, the points near Greenfield are shown with a very short lead time, but previous warnings were within a mile with plenty of lead-time. So for what it is worth, you can now generate these maps on-demand for other tornado tracks found within the NWS Damage Assessment Toolkit (DAT).

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Tags:   dat   may212024