WMOD00299

• Title: Physical Structure of Northern Colorado River Basin Cloud Systems
• Date: 9/1/1985
• State: CO
• Weather Modification - Doc Type: Report

I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I

55. Crystal habits determined from decellerator slide analysis

for the 5 Jan 82 flight......................................171

56. Crystal habits determined from decellerator slide analysis
for the 23 Jan 82 flight.....................................172

57. Crystal habits determined from decellerator slide analysis
for the 31 Jan 82 flight.....................................173

58. Cumulative frequency diagram showing (A) the percent of
observations where the precipitation rate (R) was less than
R and (B) the percent of total precipitation which fell at
precipitation rates less than R..............................177

59. Photographs of decellerator slides from the 5 Jan 82 flight
when the shallow storm system was present....................181

60. Photographs of decellerator slides from the 23 Jan 82
flight near cloud top........................................182

61. 2D-c probe images showing the growth of dendritic crystals
in the 5 Jan 82 shallow storm system.........................183

62. Calculated trajectories of ice particles arriving at RAD and
SPL for various mean fall speeds.............................185

63. Crystals observed at RAD on 13 Dec 81 and 14 Dec 81..........187

64. Percent of irregular crystals appearing on shadow
photographs as a function of echo top temperature............190

65. Percent of columnar crystals appearing on shadow
photographs as a function of echo top temperature............192

66. Percent of needles appearing on shadow photographs as a
function of echo top temperature.............................193

67. Flight track and ice crystal concentrations for the west to
east track at -16oC on 21 Dec 81.............................198

. ,
68. Ice crystal size spectra for points on the -16oC west
to east flight track displayed on Fig. 65....................199

69. Number flux vs. precipitation rate for the 1981-82 data set..202

70. Number flux vs echo top temperature for the 1981-82

da ta set ................................................... .203

71. Ice crystal concentrations (1-1) as a function of
height and temperature for the 1539-1546 GMT sounding over

HAD on S Jan 82............................................. .211

xvii