Day 8 of the Perdigao IOP. The weather warm and sunny. Very little surface wind. Upper level winds are getting stronger and the system struggles to receive the data to burst due to the hills to the east.
Four sondes launched at 00UT, 06UT, 12UT & 18UT without issues.
The PTB330 pressure sensor as part of the surface met station has stopped working. for the 00UT launch there was some oscillation, which by 12UT was extreme and no meaningful reading could be taken.
About 35 students from the University of Porto stopped by for the noon time launch. I did a short show-and-tell presentation after the launch.