Lonnie Kopecky
EF0
Michael, is this the first of the seven tornadoes that hit Grand Island, Nebraska the evening and night of June 3rd, 1980?
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Michael Towers
Supporter
Yes Lonnie, here's a narrative about the event which includes the image I attached in my post:
http://www.crh.noaa.gov/gid/?n=gi1980tornado
Skip Talbot
EF5
Here are some level 2 radar animations from the event including GPS tracks from several chasers:
KOAX which best shows the initial activity and Mapleton:
Watch video >
KDMX which shows the nocturnal storms a little better:
Watch video >
This last video is a zoomed in, slowed down animation as Mapleton was struck by the EF3, and includes a new feature I'm developing which plots the tornado's position. I've reconstructed the tornado's path based on the damage survey so the positioning is pretty accurate, but the timing might be a little off as there were no timestamps so I'm guessing based off our video and the tornado's relative position.
Watch video >
KOAX which best shows the initial activity and Mapleton:
Watch video >
KDMX which shows the nocturnal storms a little better:
Watch video >
This last video is a zoomed in, slowed down animation as Mapleton was struck by the EF3, and includes a new feature I'm developing which plots the tornado's position. I've reconstructed the tornado's path based on the damage survey so the positioning is pretty accurate, but the timing might be a little off as there were no timestamps so I'm guessing based off our video and the tornado's relative position.
Watch video >
Kevin Walters
EF2
That is really cool, excellent work.
The Des Moines WFO has updated the survey for this event (http://www.crh.noaa.gov/news/display_cmsstory.php?wfo=dmx&storyid=66541&source=0). Quite a few changes have occurred. They include:
-Finalization of the path width of tornado "D" to 1.5 miles max
-Addition of numerous satellite tornadoes from tornado "D", some of which were strong and/or anticyclonic
-Changes to the wind speed estimates for some tornadoes. Most notably, tornado "J" from Pocahontas County was given a final rating of EF3+ with estimated winds of around 165 mph! This was a satellite tornado and is still under review
-Finalization of the path width of tornado "D" to 1.5 miles max
-Addition of numerous satellite tornadoes from tornado "D", some of which were strong and/or anticyclonic
-Changes to the wind speed estimates for some tornadoes. Most notably, tornado "J" from Pocahontas County was given a final rating of EF3+ with estimated winds of around 165 mph! This was a satellite tornado and is still under review
Tornado "J", which moved E and ESE west of Pocahontas, has been upgraded to EF4. There are some pretty telling images of the farmstead that was hit: http://www.crh.noaa.gov/news/display_cmsstory.php?wfo=dmx&storyid=66541&source=0#TorE_Section
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