I don't think I've ever reached my vantage point in time for one of these broilers. They tend to disappear by the sunrise time, so I catch them from my car window or the parking lot, or I make a quick stop and see them at my secondary vantage point. But today, I didn't know it was happening, because the sun is positioned so far north right now that I don't get an advance look as I'm doing the run. And then I caught the view at 5:16:
I presume it was broiling even more hotly a minute or 2 or 3 before that point, because it was fading fast. Here's how it looked a minute later, at 5:17, the "actual" sunrise time:
And one minute after that, at 5:18, it had calmed down into this:
A minute later it had descended into the Type #2 format that was all I had expected. The lesson is: If you want to catch The Broiler, get to your vantage point 5 minutes before the actual sunrise — even if it's the earliest sunrise of the year.