David, I'm very happy that you are not hurt and alive. I hope other chasers can learn something from this.
I disagree with the other posters that there is nothing we can really do about this. A couple of lessons to take away from this and other very close nighttime encounters this year that will make your nocturnal chasing safer:
1. When trying to "thread the needle" at night,
never trust your radar data to be precise. There are limitations with radar data. For example, Darouzette is near the maximum distance between three radars (KAMA, KDDC, KVNX) such that the radar beam is very wide and far above the ground. Also, never trust the data values to accurately portray the actual intensity. As we remember from a similar encounter on 5/5/07, the KVNX radar beam at 0.5 degrees is severely attenuated to its southwest. On 5/12/05, MTN users only saw a core of 55 dB
Z before they got munched by massive hail, because MTN maxes out at that value. Also, never trust your radar software to be timely. GR3 can be up to 6 minutes old, and MTN data can be up to 10 minutes old, even when they are downloading data on time .
2. Never trust DeLorme to tell you what county roads are paved and which are not. In fact, in states where available, I highly recommend supplementing your DeLorme software and paper atlases with the paper
Shearer "Roads of" atlas series. "Roads of Texas" was their first publication (it's at least 20 years old), and I've never encountered a situation where they marked a road as paved and it was actually not paved. In fact, I've even found a few roads marked as dirt which were actuallly paved.
3. Always trust your eyes. This is so vital during daytime chases, so at night, you basically lose your most important meteorological sensor.
What does this all mean? Keeping a wider-than-daytime-normal berth from the business end of the storms is suggested. I really don't want to sound like "I told you so", especially after David was so shaken up by this, and I hope this doesn't come across as completely insensitive. But a seasoned chaser learns to really respect the storms, and learns to understand a lot of the limitations of the tools we use to chase storms. This is what helps us live another day to chase more storms.
Perhaps revealing that I too had a similar encounter,
during the day with a killer tornadic HP supercell in my very early days of chasing (while chasing with Gene Rhoden and Dave Gold) helps in showing that we are all not perfect and learn our lessons. We use the lessons to improve our chasing, and hopefully impart the lessons learned to other chasers so they can avoid similar situations.