One of the great things about AzShear that is not available with rotation tracks – negative values. There is a strong couplet of bright red (positive shear) just to the right of bright blue (negative shear) towards the bottom left.  What does this mean? My hypothesis is that we’re seeing anticylonic flow with a maturing RFD on the rear flank of the mesocyclone. You’ll see these shear couplets become quite apparent  coincident with supercell tornadogenesis! Several examples of this in previous blog posts. If you look closely there is a verified tornado track to the east just east of the state line. Be interesting to see how this evolves!

Next, look at the kink in the AzShear line farther north. This appears to be a developing mesovortex along that kink.  The orientation of the kink was normal to the 0-3km shear vector, which was very strong. The AzShear here is much noisier here overall due to the messier storm mode and the much smaller velocity bin sizes close to the radar.

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