GRLevel3 question

[Dave Gallaher]

Watching the long supercell that crossed Memphis and Nashville on 2/5, I was switching between radar sites and noted that views from KOHX and KPHX were showing TVS sigs, but when I switched to KHTX they never showed up. Are these rotational icons site specific? I thought they were overlayed like warnings.

 

[Jim Saueressig]

As far as I know they are site specific from the site reporting them.

 

[Chad Cowan]

The icons you see are a product of the Mesocyclone Detection Algorithm (MDA) which is computed using the velocity data from the specific radar site. Because the velocity data from each radar site are different (distance, angle, other variables), the MDA output is not always the same.

 

[Dave Gallaher]

Excellent--thanks for clearing that up.