Tornado Watch issued for Union County

A Tornado watch has been issued by the National Weather Service and Storm Prediction Center. It is valid until 8 pm.

From the NWS:

Strengthening mid-to high-level flow fields this afternoon will    promote storm organization with a favored tendency for supercells    with updrafts not located within a cold pool-forced ascent regime    (i.e., squall line).  

As such, strong low-level shear will    potentially favor strong low-level mesocyclone rotation with the    more robust/discrete updrafts.  A couple of tornadoes, in addition    to damaging winds, are the primary hazards.