Day 15 of the Perdigao IOP. The weather was pleasant, although a bit warm, with high clouds and mostly calm surface winds.
Four sondes launched at 00 UTC, 06 UTC, 12 UTC & 18 UTC, all without issues.
Additional sondes launched by OU students at 15 UTC, 21 UTC Monday, and 03 UTC Tuesday morning. None of these appear to have had any issues either.