Interesting tidbit from the Storm Prediction Center...
However, strengthening southerly winds across the southern Plains
this evening, combined with surface vorticity in vicinity of the
cold front in northern OK to the stationary front extending from the
eastern TX Panhandle to west TX suggest some increase for a tornado
threat will be possible this evening. 23Z RAP analysis indicated
large 0-3 km CAPE juxtaposed with the greater surface vorticity in
the TX Panhandle to west TX, suggesting a tornado threat, at least
for early this evening.