South Texas Weather Modification
Association



10



Counties



Bandera, Uvalde, Medina, Bexar, Frio, Atascosa, McMullen, Karnes, Wilson and Bee.



2.5



million acre-feet



Roughly the amount of additional precipitation fell as a result of cloud seeding across all project areas.



25



Years



The association first formed back in 1996 and conducted its first cloud seeding mission the following year.



1



Mission



Enhance precipitation across each project area, in the safest and most cost effective way possible.


The South Texas Weather Modification Association (STWMA) is a non-profit organization consisting of several water districts committed to enhancing rainfall across the south Texas operation area. Rainfall enhancement is conducted using cloud seeding techniques where aircraft release microscopic particles of silver iodide and calcium chloride into thunderstorms to increase rainfall efficiency. The association first formed in 1996 and conducted its first cloud seeding mission the following year. After 25 years in existence, the STWMA, based in Pleasanton, continues to perform seeding operations over multiple counties in south-central Texas.





830.281.3887 | Pleasanton, TX



South Texas Weather Modification Association