WMOD00161

• Contract/Permit #: 2003-01
• Applicant: Don Griffith, North American Weather Consultants
• Sponsor Name: Gunnison County, Dos Rios Water System, Upper Gunnison WCD, Gunnison, etc.
• Project Name: unnison WM Record of Decision
• Title: Gunnison County Weather Modification Record of Decision
• Date: 12/5/2002
• County: Gunnison
• State: CO
• Country: United States
• Weather Modification - Doc Type: Record of Decision

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. Table 3. Storm Statistics by Month
. First Portion: Number of events with 700-mb wind direction in each sector; winds and
. temperature all at 700 mb; Stability - # well-mixed, # slight stability, # stable; Total seedable:
. 700-mb temp of -2C or colder, and not in "stable" category
. Oct-Apr Oct Nov Dec Jan Feb Mar Apr
. 700-mb dir
. 0-22 degrees 9 2 0 I 0 0 3 3
2345 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 I
. 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 I 0 I 3
181-202 15 4 2 I 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
It 293,315 18 t 4 0 2 I 3 7
. 316,337 3 0 0 0 1 0 1 1
338,359 7 2 0 I 2 0 0 2
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,- Total Sndgs 166 18 24 9 22 29 27 37
Total Storm Days 141 17 23 10 17 23 21 30
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. Mean wind 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%
'" 5,6, 12,11, 16,6, 20,10,
It Stability 72, 49,45 5,9,4 10,5,9 4,2,3 11 6 5 7
It # Per Season
. Total 12.8 1.5 2.1 0.9 1.5 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 lOA 0.8 1.6 0.8 1.4 1.9 1.6 1.9
Seed.ble 7.6 0.6 l.l 0.5 0.9 1.4 1.3 1.5
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