Laserfiche WebLink
<br />#"''; <br /> <br />\. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />COLORADO WATER CONSERJATION BOARD <br />Department of Natural Resources <br />823 State Centennial Building <br />1313 Sherman StreFf <br />Denver, Colorado 80203 <br />Phone: (lOl) 866-3441 <br /> <br />STATE OF COLORI\DO <br />~ <br /> <br />M E M 0 R A <br /> <br />Richard D. lamm <br />Governor <br /> <br />N DUM <br /> <br />I. William McDonald <br />Director <br /> <br />DavidW.Walker <br />Deputy Director <br /> <br />TO <br /> <br />Ron Cattany, Associatefirector, <br />Department of Natural jsources <br /> <br />Bill McDonald AA t~c'~~,Lc - <br /> <br />April 9, 19841lv . <br /> <br />FROM: <br /> <br />DATE: <br /> <br />SUBJECT: <br /> <br />Spring Flood Preparedness Activities and <br />Flood Threat Forecast <br /> <br />In response to your request at our March 28, 1984, Spring <br />Flood Review meeting, we have prepared our 1984 Spring Snowmelt <br />Flood Forecast. This flood threat analysis is based on snow data <br />as presented in the' SCS' s "Advanced Snow Survey Information n <br />dated April 1, 1984 and our knowledge of community flood problem <br />areas. <br /> <br />Snowmelt flood events are the result of three climatic <br />parameters. <br /> <br />o Snowpack <br /> <br />o Temperature <br /> <br />o Timing <br /> <br />Snowpack - When an average basin snowpack exceeds 150% of <br />the recorded average, concern should be stressed regarding a <br />flood potential. When the snowpack exceeds 200% of the <br />recorded average, downstream community officials should <br />begin advance flood mitigation measures. <br /> <br />Temperature - From our past experience in the monitoring of <br />snowpacks and their resultant runoffs, we know that for high <br />water to occur within a basin an extended warm temperature <br />trend of 5-7 days must occur without freezing in the <br />snowfields above elevation 10,DDO ft. M.S.L. to precipitate <br />a flood. <br /> <br />198 <br />rc <br /> <br />Herbert H. VandemoC'r, Chairman - Richard W. Johnston, Jr., Vice Chairman <br />CM. Furneaux, Floyd L Getz. Robert A. Jackson, Frederick V. Kroeger, James S. lochhead, David W. Robbins, David H. Smith <br />