WMOD00133

• Sponsor Name: Western Weather Consultants, LLC
• Project Name: Cloud Seeding Analysis
• Title: An Analysis of Regional Snotel and Ski Area Precipitation Data To Evaluate Precipitation Changes Resulting from Ten Seasons of Wintertime Cloud Seeding Operations over the Vail Ski Area
• Prepared For: Vail/Beaver Creek Ski Areas
• Prepared By: Western Weather Consultants, LLC
• Date: 3/1/2001
• Weather Modification - Doc Type: Report

19"

18"

17"

16'1

15"

14"

13"

12"

11'

10"

9" ,.

8"

7"

6"

16"
15"
14"
131'
12"
11"
10"
9"
8"
7"
6"
8500'

Total Season Profile Elevation vs. Precipitation
10 Years, 1985-86 to 1995-96

Up Wind Ranges
~ ~===r=._- - -
~
~ --
............MidRa.rt!~._
~ .........
--'
--
" .----
,../' ,--
"
,--
--
--
--
,--
------
-' ---
,-' -- ---- DOwn wind R.a:ID1.es
--- --
--- -------- --
--'
--'
,- '=t-- .. .-_
--
, _1--"'--
,-
. ---~

8500'

9000'

9500'

10000'

10500'

11000'

1150tCJ'

Total Season Profile Elevation vs. Precipitation
6 Years, 1995-96 to 2000-01

_ _ _ Mid Rmlges
----
--
_------ - _---r50l\TI Wind Ranges
---- ---
--

----

---
,--
--

----- _-- I
----- !

---
---
---
------

--
--
-

----

9000'

9500'

10000'

10500'

11000'

115C10'

Graphs represent the normal distribution of mountain Snotel precipitation by elevation as weather systems move across Calc
ranges for the ten and six year periods of this study.

Up-Wind ranees observed at McClure Pass, Bison Lake and Trappers Lake. Mid-Ranees observed at Independence Pass,
Kiln, Ivanhoe and Lynx Pass (Vail is located in this range). Down-Wind ranees observed at Grizzly Peek and Arrow.