WMOD00307 ‎(2)‎

• Title: Evalutation of Operational Cloud Seeding in Western Kansas - Final Report
• Date: 11/1/1987
• State: KS
• Weather Modification - Doc Type: Report

i'

CONTENTS

'--...

. '
1. IntJ'Oduction, summary, and conclusions .............................

2. Project ~ons ...........................................

2.1. Seed.iJlg O)?'erations .......................................

2.2. Seed.iJlg materials .........................................

3. Statistical analysis of rainfall data .................................

3.1. Oimatology ................. ~ . . . . . . . . . . . . . . : . . . . . . . . . . .

3.2. Organization of the data ....................................
3.2.1. National Weather Service Cooperative Observer

Network data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.2.2. Gridded data .. '. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.3. Target-control comparisons. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.4. Urge-area study .........................................

3.4.1. May-August season ..................................

3.4.2. Monthly patteIDS ....................................

3.5. Discussion .............................................

4. Evaluation of effects of seeding upon hail losses ....................... ~;

4.1. Organization of data ....................................... ~;
4.2. Relationship of hail severity to elevation . . . . . . . . . . . . . . . . . . . .. . . . .. 26
4.3. Comparison of losses in the target area during seed and ,

no-seed years ......... ~ . . . . . . . . . . . . . . . . . . . . . . . . . . .'. . . .. 28
4.4. Examination of radar records ................................. 3l
4.5. Attempts to use control areas ................................. 3Jl

4.6. Calculation of hail/rain ratios ..........................."..... 33

5. Dis.cussion

6. References

Appendix 1. Target-area stations (southwest Kansas) with at least an
IS..year record of precipitation between 1948 and 1974 ............. '. . . . .. 37

Appendix 2. Stations west of IOIoW with coefficients of correlation
with the 14 target-area stations of 0.67 or greater ....................... 38

1.

~l
<II'
-'
."

~~
~~
13

13
13
U~
19
19
21
21

3C'
.,

3C'
.,