Abstract: Using ground observation,conventional high-altitude sounding data,NCEP 1° ×1°reanalysis,and FY-2 G infrared cloud image data,the causes of a snowstorm in northern Xinjiang on10-13 November 2016 were comprehensively analyzed. It shows that,the blizzard occurred under the“single-resistance”meridional circulation and favorable high and low altitude weather system configuration. The specific feature was that the ridge of blocking high at 500 hPa in Eastern Europe was stable,while the West Siberian vortex and cold trough moved southeast toward Central Asia. The200～500 hPa low vortex and cold trough system were deep and forward-dipping. After strengthening the polar front at the bottom of the vortex,it moved over the northern Xinjiang. With the development of warm ridges at 700～850 hPa in northern Xinjiang,the surface pressure field presented a“two highs and one low”situation. Northern Xinjiang was in the warm zone in front of the cold front and behind the warm. The snowstorm area was overlapped by both the northwest jet and westerly flow as well as easterly flow. There was only one western water vapor transportation path below 500 hPa. The strongest water vapor transport was between 600 hPa and 700 hPa,while the strongest water vapor convergence was around 850 hPa. The largest snowstorm center（Yumin） had stronger water vapor transport intensity,thicker convergence and longer duration,with its average cloud top blackbody brightness temperature（TBB）value 10 ℃ higher than that at Fuyun approximately.