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Last modified
7/28/2009 2:27:19 PM
Creation date
10/1/2006 2:10:53 PM
Metadata
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Template:
Weather Modification
Applicant
Don Griffith North American Weather Consultants, Inc.
Sponsor Name
City and County of Gunnison
Project Name
Cloud Seeding Evaluation
Title
The Development, Conduct and Evaluation of a Cloud Seeding Program for the Gunnison River Basin, Colorado During the 2003-2004 Season
Prepared For
City and County of Gunnison
Prepared By
North American Weather Consultants
Date
8/1/2004
County
Gunnison
Weather Modification - Doc Type
Report
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<br />~ <br />~ <br />~ <br />~ <br />~ <br />~ <br />t <br />t <br />~ <br />t <br />t <br />t <br />t <br />~ <br />t <br />~ <br />t <br />t <br />t <br />t <br />t <br />t <br />t <br />t <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />t <br /> <br />figure demonstrates the lack of precipitation during the month of March at this site, which is <br />representative oflhe region as a whole. A significant amount of the existing sno\\l'ack melted at <br />many mountain locations below about 9.500 feet in elevation. with sites even above this <br />elevation experiencing substantial snowmelt. There were two seeding opportunities during <br />March. <br /> <br />A weak storm system embedded in northwesterly !low brought some snow showers to the <br />area on ~1arch 4.5 (#17). Seeding began on the evening of March 4 and continued through <br />midday on the 5th, Snowfall amounts in the 3-5" range were reported. with up to OS' or more of <br />\vater equi\"alent in some areas. <br /> <br />A brief stormy period on .\1arch 26-27 brought variable amounts of snowfall to the <br />Gunnison Basin. as snow showers crossed the area in a northwesterly flow pattern. Seeding <br />began on the evening of March 26 and continued through mid-afternoon on the 2th (#18). <br />Snowfall amounts ",'ere quite variable. with 4-5" of accumulation reported by some CNG <br />operators. SNOTEL data indicated that portions of the target area received up to 0.5" or more of <br />water equivalent. <br /> <br />April 20().t <br /> <br />A couple of storm events increased the snowpack somewhat during early April. \....ith the <br />southern portions of the target area again receiving the most. T\vo seeded storm events occurred <br />in April. before the seeding contract pcriod cnded on April 15. <br /> <br />An upper-Icvel storm system centered over Arizona brought heavy snow to portions of <br />southwestern Colorado on April 4-5 (NI9). Arcas near the San Juan Range appeared to receive <br />the most. but water equivalent anlounts of 0.5" or more v.."ere common in the target area. Seeding <br />began on the evening of Apri14 and continued throughout much of AprilS. <br /> <br />"6 <br />
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