The inclination (angle) between the wind and conductor is important as well. Refer to IEEE 738-1999 for the most detailed formulation. Some utilities take 2 ft/sec perpendicular wind. In Ontario the minimum wind condition is 4 km/hr at 20 degree inclination with the conductor.
For planning...
We need a 115/12 wye-delta 5 MVA mobile transformer with 6 LV feeders. Does anyone know which N.American utility/company would rent a unit? Note the wye-delta connection. Thanks in advance