Highly convective situations prevailed through most of December and January, with strong vertical motion over the Bolivian Altiplano. In February and March, increased moisture advection from the east occurred in mid-tropospheric levels. These results are confirmed by isobaric 5-day back trajectories and transit time analysis at the 400 hPa level. Highly variable patterns of atmospheric circulation can lead to snowfall on Sajama during the summer months.
Blue colors show easterly winds.