I was trying to understand a strange temperature bump at MIDX VEA and Richard noticed that there had been a very abrupt  excursion outside.

This event turned out to be responsible for the VEA bump I observed at MIDX.  The outside temperature rose from 42F to 54F in about 45 minutes

Take a look at these two outside temperatures from X and Y recorded yesterday around 8 pm.

The end stations were not affected since we still have chillers operating there.