Interesting Power Spikes

So, I decided to check in to see what is going on with ole' TED and I logged in and saw some odd power usage.  The figure below is for the last 48 hours  What's interesting is the short-term mini-spikes that were occurring 2 days ago, but not this AM:



My Househould Power Usage from 3/28 to 3/30.


From the graph, the 1.1-1.2 kWh spikes start around 10pm and continue until 8am.  It should be noted that no one was home then as you can see, there's no normal increase in power for the morning and evening activities.  Tuesday's power usage showed 32 kWh being used.  Maybe it was really cold outside?  Checking on wunderground.com for my area I see that nighttime temperatures were averaging 28-30F:  Pretty cold.  And it didn't get out of the 30s until 9am...right when the temperature spikes stop.  The next day was significantly warmer showing nighttime temperatures in the mid 50s.

So, I guess I just figured out what was going on.  I probably need to remind my wife to put the thermostats into "Vacation" mode when she goes away and I'm not around.  Otherwise TED will tell on you....Tsk tsk...