That reminds me of one such event that happened sometime last year. I recall that every NOAA Weather Radio channel I picked had a station on it. The farthest south? Brownsville. If memory serves me correctly, I also picked up Junction, Corsicana, and Midland among others. I also recall getting several different DPS stations as well. Some were so clear that it was as if the repeater were right next to my house. The clearest, if I recall correctly, was DPS Corpus Christi. I've heard several of these band openings over the years, the earliest I recall was in the days before I had a scanner and was playing around with a Wether Radio. That time, the farthest west I got was El Paso and the farthest north was Waco.