Forecaster comments from EWP blog...
After the convection developed rapidly, the CI and CTC products
became masked due to the TS plumes. However, the convection at the
north end of the CWA may have kicked out an outflow boundary to cause more
development in clear air. This was picked up by the CI product with an
increasing signal in subsequent frames.
A stronger (yellow) signal was evident on the next frame.
The resulting composite reflectivity (upper right image), showing
development to 45dbz 15 minutes later. Comp reflectivity was used here
due to beam blockage at 0.5 degrees.



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