(note: although the The North American Interstate Weather Modification Council has fallen on hard times since we first featured this information on The Blanket Effect in 2006, the following excerpt from the minutes of their 9/23/2004 meeting (PDF) serves as a historical factbook in the evolvement of weather modification programs in the western United States)
Eight operational rain-enhancement projects were in operation during the 2004 cloud seeding season in Texas covering 39 million acres.
Two of the eight projects (based in San Angelo and Carrizo Springs) are dual purpose, with an added emphasis on hail suppression. For the first time, multiple projects are sharing radar facilities and meteorological support services.
The Texas Legislature did not appropriate state funds to support the operational
program during 2004. Operating costs have been borne by the water districts and
weather modification associations that sponsor the projects.
Oklahoma does not have actual operations going on but is a partner with Texas in the research program serving as a subcontractor.
Weather Decision Technologies and the National Severe Storms Laboratory have linked NEXRAD into the operational programs in Texas for the research effort.
Utah had five active project areas during the 2003-2004 winter season.
The projects used a total of 137 silver iodide ground generators for a
total cost of $377,900 of which the state paid $142,400. The state budget for the
projects is $150,000. Each of the projects has a local sponsoring entity.
The Nevada Cloud Seeding Program operations ran from November 2, 2003 to May 10, 2004.
There were five project target areas. Two target areas (Walker-Carson and Tahoe) use aircraft and others 20 remotely-controlled ground generators. 82 aircraft hours were flown with 54 seeding hours, and 3440 ground seeding hours reported
A silver iodide and cesium solution was used on the last four flights of the project so evidence of that is being looked for in the snow samples.
The Denver Water Board has opted to hike water rates and [to] trim back on the cloud seeding program. The board will contract to keep the generators in place and will make the call regarding seeding if the forecasted average doesn’t materialize.
The Colorado Water Conservation Board (CWCB) has expanded program spending authority from $7100 to $25000 in fees from various cloud seeding operators to be used to carry out various programmatic duties. He also noted the CWCB has approved $90,000 in cost-share grants for 2004-2005.