2015 03 18 0200Z Radiosonde Launch Report

The sky was mostly clear. The wind was very mild (less than 5 mph) at the surface. The radiosonde was launched at 02.00Z. The ascent rate was about 6.5 m/s. The boundary layer extended to around 740 mb. The atmosphere was quite stable overall. The air was near saturation at around 730 mb and 410 mb. Winds below 600 mb were mild (below 10 m/s) and the directions varied quite a bit. Strong westerlies at more than 30 kts was observed above 600 mb. The jet stream was recorded around 360 mb at 60 kts. Note that in raw data the sonde started to fall (possibly due to balloon popped) at around 175 mb before I terminated the observation. The ascent was very fast as the whole sounding only took 30 minutes. 

Written by Joseph Lee, 18 March 2015