Thanks for the very good analysis and explanation! @kevin1, you were spot on! PSEG (power company) came out after I called again because half my house lost power. Turned out to be a faulty connection at the pole. The lineman said the box on the side of the house was perfect but connection at the pole was bad. He said whoever did that before did not strip enough of the wire. While he was replacing it, he said it sparked on both legs. So he replaced the bolts and connection on both legs and said that was the cause of all the issues.
Pretty awesome that Sense detected that there was an issue. However, it would have been great to get notified when the power quality anomalies hit a certain threshold. I could have called PSEG sooner if I had known 
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@JustinAtSense Let me know if the Sense team would like some free, pro bono help to implement this. I’m a full stack software engineer and iOS/Android developer. Would love to help.