WMOD00268

• Applicant: CWCB
• Sponsor Name: USBR
• Project Name: Final Report Weather Damage Mitigation Program
• Title: Numerical Simulations of Snowpack Augmentation for Drought Mitigation Studies in the Colorado Rocky Mountains
• Prepared For: USBR - WDMP
• Prepared By: Curt Hartzell, Dr. William Cotton, Joe Busto
• Date: 9/1/2005
• State: CO
• Weather Modification - Doc Type: Scientific Study

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Table 2.1. Operational Cloud Seeding Summary for DW Program

OW & Vail/OW Operational Seeding Summary for 2003-2004 Season
Note: The Vail/OW data are for Vail seeding generator sites used for the OW Program.
Operational Seeding Summary Parts Vail/OW OW V/DW+DW AGI
Event From To of Seeding Seeding Seeding Output Grams
No. Date Time Date Time Days Hours Hours Hours (grams) per Hr.
, 1112103 17:30 11/4/0312:00 3 41.00 519.75 560.75 8,316.00 14.83
2 11/51038:30 11/6/0316:30 2 56.75 380.00 436.75 5.060.00 11.59
3 11171038:30 11/8/0318:00 2 41.75 105.75 147.50 846.00 5.74
4 11/101037:30 , 1112103 9:00 3 122.75 742.00 864.75 7.01050 8.11
5 "/13/037:00 11/15/039:00 3 101.50 679.75 78125 8.156.00 10.44
6 11/16/0321:30 11118/0311:00 3 7950 387.00 46650 3.860.50 828
7 11/221038:00 11/23/0312:00 2 24.00 232.75 256.75 2,315.50 9.02
8 11/25/03 10:00 1112710313:00 3 88.75 619.50 708 25 4,730.50 6.68
9 12/7/038:30 1219/03'6:00 3 7825 68625 764.50 6.837.00 8.94
10 12/10/0323:00 12/12/0322:00 3 90.50 448.50 539.00 2,766.00 5.13
11 12113/039:30 12/15/032300 3 69.25 650.75 720.00 5,18025 7.19
12 12121/038:00 12/22/0318:30 2 63.50 498.00 561.50 4,205.50 7.49
13 12/25/0323:00 12/28/03 10:00 4 58.75 61525 674.00 4.62050 686
14 12129/0321:30 12/31/0311:30 3 86.50 321.00 407.50 2,185.50 5.36
15 1/1/04 21 :30 1/4/04 9:30 4 72.00 869.00 941.00 7,4 11 .00 7.88
16 1/16/04 10:30 1/17/049:00 2 0.00 498.75 498.75 3,559.00 7.14
17 1/19/04 21:30 1/21/049:00 3 0.00 588.75 588.75 4.772.00 811
18 1/25/047:00 1/25/04 23:00 1 24.25 334 25 358.50 2,58800 722
19 1/28/04 7:45 1/29/04 23:00 2 51.00 417.00 468.00 3,410.00 729
20 1/30/04 20:30 211/04 14:00 3 43.50 849.75 893.25 7,89600 8.84
21 2/3/04 10:00 216/04 1000 4 2200 1,167.50 1,189.50 8.887.00 7.47
22 2f7/04 21:00 219/04 2300 3 28.50 659.00 687.50 5.606.50 8.15
23 2/11/048:00 2/11/04 2300 1 0.00 194.00 19400 1,18125 6.09
24 2/19/04 11:30 2/20/04 830 2 0.00 206.50 206.50 1,96800 9.53
25 2121/04 12:00 2/22/04 22:30 2 000 305.75 305.75 3,999.00 13.08
26 2123/04 20:00 2124/04 22:00 2 0.00 231.75 231.75 3,396.00 14.65
27 2/27/04 18:00 2/29/04 23:30 3 0.00 19025 190.25 2,838.50 14.92
28 3/4/04 17:30 3/5/04 9:00 2 0.00 72.00 72.00 566.00 7.86
29 3/14/04 21 :00 3/15104 900 2 0.00 53.50 53.50 642.00 12.00
Totals 7S 1,244.00 13,524.00 14,768.00 124,810.00 8.45

Water Year 2004 (October 1, 2003 - September 30, 2004) over the
central Colorado Rocky Mountains started off significantly below the 1971-2000
average; the October 2003 precipitation was only around 40% of average, The
cloud-seeding activities for the DW Program began on November 2, 2003. There
were good opportunities for cloud.seeding activities during November, which was
the only month during the DW Program's operational period when the target area
precipitation was greater than the 1971-2000 average, December 2003 and
early January 2004 had about average precipitation over the target area; this was
followed by a 2-week dry spell in mid-January, February 2004 had good cloud-

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