Great, real data, can you post a link. TVM
No, sorry. The data I use is from the NOAA global stat met database embedded in an AAR mission planning system. I created a short route around the area in question, changed a few dates and cruising levels and found that the wind was well in excess of 20 kts at many points.
Against an enemy armed with anything more lethal than sharpened guava halves, gas bags would be a sitting duck. Or rather, turkey.
Radar-equipped aerostats do indeed do a good job for the US DEA though.