Yes, it was my first heavy snow winter drive over I-90 but I'm not an amateur, I just made a mistake in judgement and was highly distracted of monitoring my energy during the drive. I drive I-90 to work every day between Cle Elum and Redmond so I'm familiar with how much energy it takes to get over the pass during "non-snowing" conditions.
I started at the Issaquah Costco with 130 rated miles (not 120.) I had a lot of things going on that night...heavy, heavy snow fall (sudden storm and the pass closed right after I went over it eastbound), it was getting late in the evening and temperature was dropping down to freezing (no time to charge further, thought it would be enough), I had a car full of Costco purchases for Thanksgiving (extra weight), and I was on the phone for most of the resultant drive due to a family emergency that I was trying to take care of...I was highly distracted regarding my energy monitoring between trying to see the road through the snow falling and taking the phone call. No, I did not have my final destination programmed, so the trip calculator wasn't running to predict energy usage...I knew where I was going and I believed I had enough energy (assuming I wasn't driving at 600Wh/mi.) So yes, a perfect storm for not paying attention to battery level and running out of juice. I've driven over 70kmi on the car and done many cross country trips...sometimes you think you have plenty of energy to cover your range based on prior knowledge, change any one variable, and I would have been fine.
When I got off my emergency phone call around Easton, I realized (too late) that I was using almost 600Whr/mi for the 64 mile drive (not 80mi from Issaquah.) So yes, the math doesn't lie, I was in trouble. I tried to compensate by turning off the heater, slowing down to 35mph, and turning on the trip calculator for the final 15 miles. It was predicting that I should get to my home with +2mi. However, as I got off at Exit 80, the remaining range quickly decreased from 6 to 0 in less than a minute. I was hoping there might be a little range in the reserve...there is usually is a couple of miles, but not at 28 deg. I think the outside temperature decreased over the last 15 miles and took whatever reserve range is usually in the battery and reduced it to zero. Trip computer confirmed that with the last minute update...ticking away the remaining miles like the last bits of sand running out of the hourglass.
Yeah, I was not happy running out of juice, and I don't blame the car, I made several mistakes on this drive. There were a lot of shoulda-coulda-wouldas (pull over for the phone call, stop at the top of the pass and grab a charge, drive 5 mph slower on the route, lower cabin temperature...etc) and I beat myself up pretty good for it. But it's likely to not happen again for this drive, especially when this supercharger comes online.
I just wanted to share this experience because it could happen given the adage "I think I have enough energy, I don't need to worry..." Having your car on a flatbed for a 2 mile trip is embarrassing enough and the sting of that towing fee will burn a powerful teaching moment into your brain.