WMOD00415

• Title: Winter Cloud Seeding Potential on the Mogollon Rim - Final Report
• Date: 1/1/1989
• Weather Modification - Doc Type: Report

CONTENTS - Continued

Page

6. Cloud microphysical, precipitation, and stability characteristics ............................ 75

6.1 Aircraft microphysical observations ............................................. 75

6.2 Aircraft liquid water observations .............................................. 75
6.2.1 Liquid water sensors and their measurements ......... . . . . . . . . . . . . . . . . . . . . . . . . . 75
6.2.2 Representativeness of aircraft cloud sampling .................................. 77

6.3 Observations of ice particles .................................................. 80
6.3.1 Aircraft observations .................................................... 80
6.3.2 Surface observations by the 2D-C probe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
6.3.3 Visual surface observations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

6.4 Surface precipitation characteristics ............................................. 85
6.4.1 General characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
6.4.2 Heavy precipitation periods ............................................... 87
6.4.3 Precipitation and winds .................................................. 88
6.4.4 Precipitation by storm type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
6.4.5 Summary of surface precipitation ........................................... 90

6.5 Atmospheric stabilities ...................................................... 91

6.5.1 Introduction................ . . . . . . . . . . . . . . . . . . . . . . . . ~ . . . . . . . . . . . . . . . . . . 91

6.5.2 Consideration of the SCPP targeting model ................................... 91
6.5.3 Stability observations for ground seeding plume rise ............................. 92
6.5.4 Summary of stabilities ................................................... 92

6.6 Winds aloft . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

6.6.1 Introduction................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

6.6.2 Predictors of Happy Jack winds ............................................ 93
6.6.3 Distortion of the Happy Jack winds by terrain. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

6.6.4 Summary of winds ...................................................... 94

7. Case studies of selected storms ................................................... 95

7.1 Introduction and analysis products. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95

7.2 Aircraft mission of January 28, 1987 ............................................ %

7.3 Aircraft missions of January 30-31, 1987 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
7.3.1 Satellite photograph pattern for the storm of January 30-31, 1987 ................... 99
7.3.2 Aircraft mission of January 30, 1987 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
7.3.3 Between the aircraft missions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 102
7.3.4 Aircraft mission of January 31, 1987 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 103

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