Here are four screen grabs from a Mexican webcam overlooking Durango that gives some insight into the weather at or near the crash scene. There were two rainshafts that contained downbursts. A rain toe is the signature of a downburst that has struck the ground.
Airports in Mexico have neither the Low Level Wind Shear Detection System nor Terminal Doppler Weather Radar, the two systems that, along with advanced training, have eliminated U.S. downburst accidents since 1994.
Again, for more information on aviation and downbursts, please scroll down one post.