This article deals with a report of storm （Shuurga）, which is an inclusive Mongolian term of various climatic phenomena with strong wing, published by Mongolian national headquarter of emergency. On 26 ‒ 27 May 2008, an extremely strong storm which accompanied blizzard and sand storm attacked eastern area of Mongolia. It caused the severest damage after 1980’s in Mongolia, 52 deaths and 243 thousand of animals lost for example. So the report focuses on the cause of the damage, in spite of the fact that a warning for the storm was given 3 days before by the Meteorological Office of Mongolia.　The report argues about the situation of 1） information transmission from the capital to prefectural centers, 2） information transmission to smallest units of the administrative organization and pastoralists, and 3） response of pastoralists to the information and storm itself, in reference to data collected from the field survey by the authors of the report.　It concluded as followings; 1） it is inevitable that damages of severe natural disasters will be growing in frequency and strength because of global warming, 2） Mongolian government already established the system for prevention of disaster even though it may be insufficient and the Meteorological Office of Mongolia had ability for weather forecasting of a disastrous climatic phenomenon, 3） the system of information transmission to smallest units of the administrative organization and pastoralists may not be adequate and there was a problem about the uniformity of information transmitted to them in various channels, 4） lack of pastoralists’ prevention of disaster made the damage more severe, because quite a few pastoralists didn’t know the weather forecast, some of them didn’t understand the real meaning of the forecast even though they heard of it, and some of them thought the forecast was off the mark as the weather was very well just before the storm.　In reference to the report and my own field research data in some places of Hentii and Sukhbaatar prefectures, it can be true that one of the major factors for causing severe damages by the above-mentioned storm was the fact that it accompanied with blizzard in areas with a high population and livestock density, like Berh village. However, this criterion didn’t apply to some severely disaster-stricken areas but other long-term process such as drought （gan） or snow disaster （zud） was suspicious in this case. So, it is needed to classify sources of storm disasters in Mongolia by cases and areas and to start to make a long-term outbreak mechanism of storm disaster clear, especially from a socio-cultural perspective, for further research.