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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Table 2-3. Storm ( Oct - Apr <0.4") statistics partitioned by month
(All winds and temperatures at the 700-mb level)

Oct-Apr Oct Nov Dec Jan Feb Mar Apr
700-mb dir
# 0-22 degrees 9 2 0 1 0 0 3 3
# 23-45 4 0 0 0 0 0 2 2
# 46-68 0 0 0 0 0 0 0 0
# 69-90 0 0 0 0 0 0 0 0
# 91-112 1 0 0 0 0 0 0 1
# 113-135 0 0 0 0 0 0 0 0
# 136-158 2 0 0 0 0 0 0 2
# 159-180 5 0 0 0 1 0 1 3
# 181-202 15 4 2 1 0 0 2 6
# 203-225 25 2 4 2 4 8 3 2
# 226-248 32 2 5 4 3 12 6 0
# 249-270 35 3 6 0 7 8 5 6
# 271-292 10 2 3 0 2 0 1 2
# 293-315 18 1 4 0 2 1 3 7
# 316-337 3 0 0 0 1 0 1 1
# 338-359 7 2 0 1 2 0 0 2
Total Sndl!s 166 18 24 9 22 29 27 37
Total Storm
Davs 141 17 23 10 17 23 21 30
Mean wind speed 21.3 16.5 23.0 24.9 25.5 26.3 18.3 17.2
Mean temp -4.1 -1.6 -3.5 -6.0 -6.2 -5_0 -4.3 -4.1
% < or ~ -5C 46% 28% 38% 78% 64% 62% 37% 35%
% < or ~ -2C 81% 50% 75% 100% 95% 90% 93% 70%
Stability' 72 49, 45 5,9,4 10,5,9 4,2,3 5,6,11 12, 11,6 16,6,5 20, 10, 7
Storms/Season 12.8 1.5 2.1 0.9 \.5 2.1 1.9 2.7
# -5C or colder 5.9 0.4 0.8 0.6 1.0 1.3 0_9 1.0
# -2C or colder 10.4 0_8 1.6 0.8 1.4 1.9 1.6 1.9
Seedablez 7.6 0_6 1.l 0.5 0.9 1.4 1.3 1.5

1 Stability: # well-mixed, # slightly stable, # stable

2 Seedable: 700-mb temperature of -2C or colder, and not in "stable" category

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