The short-term response of thunderstorm activity to Forbush decrease in cosmic ray over 185 meteorological stations in China during 1971-1980 is studied. While the response is significant at significance levels of 10 - 2 -10 - 6 , some regions show a decrease and some, an increase of thunderstorms after Forbush decrease. The regions responding to Forbush decrease correspond to the regions responding to flares, but the sense of response is opposite. This fact poses a new challenge to the study of the correlation between solar activity and short-term weather pattern.