Selected Techniques for Assessing Weather Modification: Texas Hail Suppression Case

An operational hail suppression project in the Texas Panhandle areas in 1970-1976 was evaluated using a variety of graphical display methods and statistical techniques. When using a historical target-control approach, the findings indicate s significant 48% reduction of hail insurance loss/cost values in the 2-county target area during the seeding period. The results were compared with a hail-suppression project in Kansas, which showed comparable reduction in the target area. The exploratory techniques are shown to be useful in deciding about further use of more elaborate statistical techniques.