Overview
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An intense storm system moved across the central High Plains on Sunday, May 18th. Several strong supercell storms formed producing very large hail, damaging winds and several tornadoes. |
 Preliminary Storm Reports Compiled by the Storm Prediction Center. Click on image for more information. |
Tornadoes
Select a tornado from the table to zoom into the track and view more information. The default table view is limited to 8 tracks, but can be scrolled by a mouse wheel or dynamically expanded. Additionally, the table can fill the entire window by clicking the small circular expanding arrow icon at the very top right of the table and returned to its original size by clicking the button again. The side information panel that opens over the map can be closed using the "X" on the upper right corner of the pop-up. Zoom into the map and click damage points to see detailed information and pictures from the surveys.
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NOTE: times shown below are local to your device's time zone. |
The Enhanced Fujita (EF) Scale classifies tornadoes into the following categories:
| EF0 Weak 65-85 mph |
EF1 Moderate 86-110 mph |
EF2 Significant 111-135 mph |
EF3 Severe 136-165 mph |
EF4 Extreme 166-200 mph |
EF5 Catastrophic 200+ mph |
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| Tornadoes that fail to impact any ratable structures on the EF-Scale are rated EF-Unknown (EF-U) | |||||
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Radar
Cheyenne County Tornado
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2211 UTC 0.5 degree reflectivity and Storm Relative Velocity. Red dot is approximate location of developing tornado. Green/blue indicate motion to the bottom right corner of image, red color is motion to the upper left. This pattern of rotation is called "anti-cyclonic" and is a clock wise direction. In majority of cases, supercells rotate in a cyclonic (counter clockwise) direction. |
2215 UTC 0.5 Reflectivity, 0.5 Storm Relative Velocity, 0.5 Correlation Coefficient and 0.9 Correlation Coefficient. Red dot is location of ongoing tornado. Blue color in CC (correlation coefficient) in same area of strong rotation indicate debris. |
2211 UTC Reflectivity at 0.5, 0.9 and 1.3 degrees, 0.5 Storm Relative Velocity (SRV) Note the northward pointing hook echo transitioning into a donut shaped appearance at the 1.3 degree tilt. This is a sign of strong rotation in the storm. The orientation of these features reflects the anticyclonic nature of the storm. |
2201 UTC Reflectivity at 0.5, 0.9 and 1.3 degrees, 0.5 Storm Relative Velocity (SRV) This storm developed 20 miles to the southwest of the anticyclonic storm. Updraft area and developing hook echo developed on the southern flank of storm, nearly the complete opposite of the anticyclonic storm. Rotation aloft (not pictured) was indeed cyclonic. This storm produced a brief tornado shortly after this image. |
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