Abstract:Through analyzing the data of lowtemperature and overcast weather processes from November to next March from 1998 to 2007, it is found that the 500hPa circulation patterns during continual overcast weather (snow, fog) in Hebei Province can be divided into three types on the Eurasian region from November to next March for each year: cold vortex, trough, and highpressure. As a example, the disasterinducing environment and the vegetable growing state in greenhouses during the process of lowtemperature and overcast weather in January 2001 are analyzed.