At the ISS2 Rancho Alegre site, Bill and Lou launched the 10am and 1pm soundings, while Matt and I launched the 4pm and 7pm soundings.
Relatively calm winds at launch switching to northerlies then finally westerlies above ~700 hPa. We saw several dry layers and temperature inversions up to 600 hpa in the afternoon soundings. Winds were very high in the free troposphere > 50 knots (58mph). At the tropopause, winds were ~100 knots (115 mph). Check-out the latest Skew-T plots for ISS2. Sedgewick ISS3 radiosonde profiles also showed similar patterns.
We saw the Twin Otter flying overhead after the 7pm launch and waved at Mack.
Matt launching the 4pm sounding.