WMOD00438

• Title: HIPLEX: A Cooperative Program on Rain Augmentation in the High Plains
• Date: 6/1/1984
• Weather Modification - Doc Type: Report

CONTENTS

1. HIPLEX results and implications for the future of weather
modification technology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.

HIPLEX overview ...........................................

Page

5

1 1

20
26

33

Bibliography. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

1 .1

2.1
2.2

2.3
2.4
2.5
3.1
3.2
3.3
3.4
3.5
4.1
4.2

4.3
4.4
5.1
5.2
5.3
5.4

3.1
3.2

3.3
4.1
5.1
6.1

3.

Accomplishments of Texas HIPLEX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.

Results of Kansas HIPLEX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.
6.

The HIPLEX studies in Montana ................................

HIPLEX-1 .................................................

Figur,es

Basic cloud seeding concepts applied to typical cumulus
clouds of the northern High Plains .............................
The High Plains Region weather modification . . . . . . . . . . . . . . . . . . . . . .
Starting schedule of HIPLEX planning meetings and
conferences . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
HIPLEX-IWS Comprehensive Experiment Design ...................
Satellite imagery helps track storm dE!Velopment . . . . . . . . . . . . . . . . . . . .
The King Air cloud physics aircraft . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Map of Texas HIPLEX field site showing mesoscale networks. . . . . . . . . .
Rain gage analysis from typical cluster day. May 27. 1979 . . . . . . . . . . . .
Satellite image of convective clouds. May 28. 1979 . . . . . . . . . . . . . . . . .
Three-dimensional wind vector analysis. . . . . . . . . . . . . . . . . . . . . . . . . . .
Composite maximum reflectivity analysis. May 27. 1979 .............
Location of HIPLEX and SPACE programs ........................
Example of aircraft used to develop and evaluate cloud
seeding hypotheses .........................................
Cloud physics aircraft time plots of vertical velocity .................
RHI radar cross section of storm shown in figure 4.2 ................
Map of Miles City. Montana. study area ..........................
A typical cumulus congestus cloud . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Map of CCOPE field site and major observation systems .............
The growth rate of western wheatgrass is recorded in test

plots. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TabIE!S

Texas HIPLEX participants ....................................
Distribution'of rainfall occurrences and rainfall by radar echo

type. . . .. . . . . '.' '. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Direct income effect based on regional regression models. ...........
Kansas HIPLEX participants ...................................
Montana HIPLEX and CCOPE participants ........................
Primary and secondary response variables and final test

statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

III

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32

13

13
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27

36