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<br />. <br /> <br />'M <br /> <br />M E M 0 R A <br /> <br />N DUM <br /> <br />\ <br /> <br />TO <br /> <br />Ron Cattany, Associate Director, <br />Department of Natural Resources <br /> <br />, <br />\ <br /> <br />"', <br /> <br />FROM: Bill McDonald <br /> <br />DATE: April 9, 1984 <br /> <br />SUBJECT: Spring Flood Preparedness Activities and <br />Flood Threat Forecast <br /> <br />In response to your request at our March 28, 1984, Spring <br />"'" I},...ti~tlt <br />Flood Review meeting, we have prepared our 1984 Spring Flood <br />^ <br /> <br />Forecast. This flood threat analysis is based on snow data as <br /> <br />presented in the SCS's "Advanced Snow Survey Information" dated <br /> <br />April 1, 1984 and our knowledge of community' problem flood areas. <br /> <br />Snowmelt flood events are the result of three climatic <br /> <br />parameters. <br /> <br />o Snowpack <br /> <br />o Temperature <br /> <br />o Seas8Ral Bate T;M!~( <br />..) <br /> <br />Snowpack - When an average basin snowpack exceeds 150% of <br /> <br />the recorded average, concern should be stressed regarding a <br /> <br />flood potential. When the snowpack exceeds 200% of the <br /> <br />recorded average, downstream community officials should <br /> <br />begin advance flood mitigatin measures. <br /> <br />198 <br />rc <br /> <br />/' <br /> <br />\ ", \' <br /> <br />.) <br /> <br />-, <br />