Laserfiche WebLink
<br />2. Analysis of Snotel Data <br /> <br />· Seeding dates and times for each season identified. <br /> <br />· Precipitation data from each site identified for each seeding <br />period. <br /> <br />> Daily precipitation read at midnight each day. <br /> <br />· A wind direction category was assigned to each <br />precipitation observation date from operational data. <br /> <br />~ Total set of seeded data (all six categories) <br />~ Category #l-Seeding wind direction 240 to 269 deg <br />~ Category #2-Seeding wind direction 270 to 294 deg <br />~ Category #3-Seeding wind direction 295 to 360 deg <br />~ Category #4-Seeding wind direction 240 to 294 deg <br />~ Category #5-Seeding wind direction 270 to 360 deg <br />~ Category #6-Seeding wind direction 240 to 360 deg <br /> <br />· From the total precipitation amounts for each wind' <br />. direction category and the total set of observations from <br />. the regional sites, an estimated precipitation amount was <br />determined for Vail by mathematical and extrapolated <br />means. <br /> <br />.. The estimated precipitation value for Vail for each category <br />was compared to the total actual observed value for that <br />category as an estimate of the precipitation change <br />resulting from the seeding operation. <br /> <br />· The same process evaluated precipitation for the entire <br />seeding period for all the ten seeding seasons. <br /> <br />· From the total data set for the ten seasons the seeded and <br />non-seeded data sets were subtracted out and evaluated by <br />the same process. <br />