This was a high stress day where we picked up a supercell storm that formed in extreme northeast New Mexico – then had to stay ahead of the fast moving storm as it moved southeast reaching Borger, TX.  Near Borger, another supercell formed to its south and also moved quickly southeast toward southwest Oklahoma.  The combined storms produced several small tornadoes (we could not confirm) – and a tremendous amount of large hail.  We encountered some of that hail along I 40 near Lela, TX.  Stones near Lela were measured to be between 5 and 6 inches in diameter.