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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 />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />~ <br />~ <br />~ <br />~ <br />~ <br />~ <br />. <br />. <br />I <br />I <br />I <br />I <br />I <br /> <br />Seeding was conducted from about 1030 - .2200 ~1ST on January 31 (#11), as a storm <br />crossed Colorado. ~uch of the basin received about OS' of water equivalent. <br /> <br />February 200~ <br /> <br />~1ost of February was dry in much of the Gunnison Basin. particularly the northern <br />(Gunnison County) portion. However. a series of heavy storms moved through the southwestern <br />U.S. in late February. and brought some very heavy snows to south\l.:estern Colorado. The San <br />Juan Range was particularly hard-hit. with several inches of water equivalent bringing the <br />snowpack to above average levels. This added to the snowpack in much of the southern <br />Gunnison Basin. in the vicinity of the San Juan Range. but the northern portions of the basin <br />missed out almost entirely. Five storms were seeded in February. <br /> <br />A powerful storm system moved onshore in California on February 2. and into the Four <br />Corners states on February 3. Light snow began falling in the Gunnison Basin on the evening of <br />February 3. and snow fell overnight as the sternl center moved over Colorado. Snow continued <br />through most of the ~lh. with northerly nO\v over the area due to the storm center being located <br />over eastern Colorado. Seeding began on the evening of February 3. and ended on the evening <br />of the ~lh (#12). SNOTEL data showed about 0.75" of water equivalent in much of the target <br />area (north and south) from this storm event. <br /> <br />A weakening storm system moved from Utah into Colorado on the night of February 7-8. <br />and seeding was conducted overnight (#13). Snowfall was light. with only a couple inches of <br />snow falling in most of the targel area. Water equivalent amounts were around 0.25" or less. <br /> <br />A storm system quickly crossed Colorado early on February 19 (#l~). reaching the <br />southern plains by midday. A moist northv.:esterly now behind this system resulted in <br />convective snow showers over the Gunnison Basin by midday. Seeding was conducted from <br /> <br />13 <br />
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