CWCB Wintertime Weather Mod Report

• Project Type: General OWC
• Applicant: Weather Modificaton
• Project Name: Colorado Weather Modification Program
• Title: CWCB Wintertime Weather Modification Report Fall 2002 - Spring 2003
• Date: 7/1/2003
• Water Conservation - Doc Type: Final Report

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2.6
2.7
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2.10
2,tl
2.12

3.1

4.1

4.2

4.3

5.1
5.2
5.3
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5.6
5.7
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5.10
5.11
5.12
5.13

Wind rose for March (27 soundings) .................................................................. 14
Wind rose for April (37 soundings) .................................................................... 15
Wind rose for October - April (166 soundings) ...............................'.................. 16
Mean 700-mb temperature by month .................................................................. 17
Percentage of storm events with lower-level temperature inversions ......,......... 19
Proposed target area and potential gI:ound generator locations ........,..,.............. 22
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Typical silver iodide generator installation ,..........................,............................. 25

Ground generator locations ...................,.......................................................,..... 32

NRCS SNOTEL snow and precipitation plot for October I, 2002 through
May 1,2003 for Park Cone, CO ......................................................................... 37
NRCS SNOTEL snow and precipitation plot for October 1,2002 through
May I, 2003 for Schofield Pass, CO ................................................................... 38
NRCS SNOTEL snow and precipitation plot for October 1, 2002 through
May 1, 2003 for North Lost Trail, CO ...................................................,....,....,.. 39

Map of2002-2003 cloud seeding operations in Colorado (CWCB) .................. 48
ActuallPredicted downwind ratios from Utah study........................................... 49
Double-Mass plot comparing Bluffto Cedar Point, UT .............................,....... 51
Precipitation target and control sites .......,..............................................,............ 53
Suowpack target andC<\utrol sites ....................................................................... 6()
McClure Pass SNOTEL graph for April 1-15, 2003........................................... 63
February precipitation ....... ................ '.........,........... ............ .............. .................. 64
March precipitation .................................. ...,....................................................,.. 64
April precipitation .......................................,.. ............,.................................,...... 65
Park Cone 2002-2003 SNOTEL data ................................................................. 67
SNOTEL site in the fall...................................................................................... 68
SNOTEL site in the winter .........,....................................................................... 68
Crested Butte vs, Buena Vista ................................,.................................~......... 72