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Investor Presentaiton

Investigation Method Heavy Snowfall and Severe Blowing Snow: Case extraction (2) Extraction method Heavy snowfall criteria Snowfall >40cm /24hr, or >60cm /48hr, or >80cm /72hr Severe blowing snow criteria 24hr estimated snow drift transport* > 1,750 kg/m If any of the criteria are met at no fewer than 5 of the 77 stations, that case is extracted as a case of heavy snowfall (or severe blowing snow). Snow drift transport rate: the mass of snow passing a unit width perpendicular to the wind direction per unit time [gm-¹s-¹]. Q=0.05V1.2 [gm¨¹s¨¹] Where V1.2: wind velocity at 1.2 m in height

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