WMOD00196

• Contract/Permit #: 2003-01
• Sponsor Name: Gunnison County, City of Gunnison, Crested Butte
• Project Name: WM Evaluation Report
• Title: The Development, Conduct and Evaluation of a Cloud Seeding Program for the Gunnison River Basin, CO During the 2003-04 Season
• Date: 8/1/2004
• County: Gunnison
• State: CO
• Weather Modification - Doc Type: Reports

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2.6 Wind rose for March (27 soundings) ........_...._._..........._......_......................_........ 14
2.7 Wind rose for April (37 soundings) ........................._............._......._........_........... 15
2.8 Wind rose for October - April (166 soundings) ................................................. 16
2_9 Mean 700-mb temperature by month ..........._....._........__._................_................... 17
2.10 Percentage of storm events with lower-level temperature inversions ........_....... 19
2.11 Proposed target area and potential ground generator locations ........................._ 22
2.12 Typical silver iodide generator installation _.._..._.............................................._.. 25

3.1 Ground generator locations ..............._.............._.........._.........._...._._..................... 32

4.1 NRCS SNOTEL snow and precipitation plot for October 1, 2002 through
May 1, 2003 for Park Cone, CO ._.........................................................._............ 37
4.2 NRCS SNOTEL snow and precipitation plot for October 1,2002 through
May 1, 2003 for Schofield Pass, CO ........._......................._.._......_....................... 38
4.3 NRCS SNOTEL snow and precipitation plot for October 1, 2002 through
May 1, 2003 for North Lost Trail, CO .........._.._........_...._.................................... 39

5.1 Map of 2002-2003 cloud seeding operations in Colorado (CWCB) .................. 48
5.2 ActualIPredicted downwind ratios from Utah study ................................_.......... 49
5.3 Double-Mass plot comparing Bluff to Cedar Point, UT ..._........_......__..............._ 51
5.4 Precipitation target and control sites .................._..................._............................ 53
5.5 Snowpack target and control sites ....................................................._.._.............. 60
5.6 McClure Pass SNOTEL graph for April 1-15, 2003................_................._....... 63
5.7 February precipitation........... _....... .............. _.... _.. _....... ......... ._.........._. _. _.. _. .... ._. .._ 64

5.8 March precipitation ...._.... _ _..................._ _. .... _ _........ _.. _. ._... ..... ....... _.. _._... _......... _.._. 64
5.9 April precipitation.. _. ................. _....._............._ _. _.. ._.................. _............... _.... ....... 65
5.10 Park Cone 2002-2003 SNOTEL data ...._......................................................._.... 67
5.11 SNOTEL site in the fall ...._................................_._.......__....._............_...._............. 68
5.12 SNOTEL site in the winter ........................................_............._..__............_......... 68
5.13 Crested Butte vs_ Buena Vista ......._..._....._._..._......_.........._.._.............._.._............. 72