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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with the 24-hr SNOTEL precipitation and SWE observations with the date of
Day+ 1. This "Day" also corresponds to the period from which the 24-hr model
simulated precipitation is derived. viz. from the 8-hr forecast to the 32-hr forecast
in a given RAMS simulation initialized at 0000 UTC with Eta data.

Table 2.2. List of 30 Cloud-Seeding Days Selected for Evaluation
(Prev - seeding was continued from previous 24-hour calendar day)

No. Date Seeding Time Targeting Wind Meteor. Regime
'1 Nov 3. 2003 All 24 hrs 215 - 240 deg Best SSW
2 Nov 5. 2003 1100-0100 hrs 230 - 250 deo Good SW
3 Nov 7. 2003 0830-0100 hrs 230 240 dec Good SW
4 Nov 10. 2003 0730-0100 hrs 250 - 260 deo Best WSW
5 Nov 11. 2003 All 24 hrs 260 - 290 dec Besl WNW
'6 Nov 14. 2003 All 24 hrs 240 - 270 dec Best WSW
7 Nov 17. 2003 All 24 hrs 270 - 305 dec Best WNW
8 Nov 18. 2003 Prev-1100 hrs 305 - 330 dec Good NW
9 Nov 22. 2003 0800-0100 hrs 230 - 305 dec Fair Trooa
10 Nov 25. 2003 1000-0100 hrs 260 - 275 dec Good W
'11 Nov 26. 2003 All 24 hrs 275 - 325 dec Best WNW
12 Nov 27, 2003 Prev-1300 hrs 330 350 dec Good NNW
13 Dec 8. 2003 All 24 hrs 220 - 360 deo Best Trooa
14 Dec 13. 2003 1000-0100 hrs 300 - 305 dec Good WNW
.15 Dec 15. 2003 Prev-2300 340 - 360 deo Best NNW
16 Dec 21.2003 0800-0100 hrs 245 290 dec Good Tropa
17 Dec 26. 2003 All 24 hrs 210 - 260 deo Good T ropa
18 Dec 27. 2003 All 24 hrs 260 - 310 dec Fair Tropa
19 Dec 30. 2003 All 24 hrs 270 - 230 deg Best WSW - trof aoch
'20 Jan 2. 2004 All 24 hrs 250 265 dec Best WSW
21 Jan 3, 2004 All 24 hrs 260 - 265 dec Best WSW
22 Jan 28. 2004 0800-0100 hrs 265 285 dec Good W
23 Jan 29. 2004 Prev-2100 hrs 285 - 300 dec Fair WNW
24 Jan 31. 2004 All 24 hrs 260 350 deg Fair Tropa
25 Feb 4. 2004 All 24 hrs 310 - 350 dec Best NNW - Low SE
'26 Feb 5. 2004 All 24 hrs 350 360 dec Best NNW
27 Feb 8. 2004 All 24 hrs 190 - 340 dec Good Trooa - Low SE
28 Feb 22, 2004 Prev-2200 220 175 dec Best SSW trof apch
29 Feb 24, 2004 Prev-2200 175 - 240 dec Best SSW - trof N E
30 Feb 29. 2004 Prev-2200 335 350 dec Best NNW

'Selected as Case Study Day for Lagrangian particle transport study.

Table 2.2 shows that there were eight meteorological regimes identified as
candidates for the Lagrangian particle dispersion and transport study. These
eight regimes and the number of days in each are listed in Table 2.3. The six
Days selected for the Lagrangian study analyses are identified by an asterisk (')

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