Problem:
The National Weather Service (NWS) polygon does not match the polygon shown on the map in Visual Command Center (VCC).
Root Cause:
The NWS updates the initial warning area which increases or decreases the polygon in VCC.
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Example of an NWS Tornado Warning: |
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Example of the VCC map before the NWS reduces the warning area: |
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Example of the VCC map after the NWS reduces the warning area: |
An NWS Tornado Warning is likely to have oddly shaped polygons that do not align with county boundaries due to the inability to pinpoint where a tornado will likely form.
Find out more about Storm-Based Warnings from the NWS.
Solution:
This behavior is expected as tornado movement is unpredictable.
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