Editing Weather modification (section)

{{Short description|Act of intentionally altering or manipulating the weather}}
{{Use mdy dates|date=September 2017}}
{{Notconfuse|Climate engineering}}[[File:A tornado near Anadarko, Oklahoma, on May 3, 1999.jpg|thumb|upright=1.3|right|A [[tornado]] near [[Anadarko, Oklahoma]] during the [[1999 Oklahoma tornado outbreak]]. Weather researchers may aspire to eliminate or control dangerous types of weather such as this.]]
{{Weather}}
'''Weather modification'''  is the act of intentionally manipulating or altering the [[weather]]. The most common form of weather modification is [[cloud seeding]], which increases rainfall or snowfall, usually for the purpose of increasing the local [[water supply]].<ref name="azwater">{{cite web | url=http://ag.arizona.edu/azwater/arroyo/061wthr.html | title=Weather Modification: A Water Resource Strategy to be Researched, Tested Before Tried | publisher=University of Arizona | access-date=April 17, 2012 | author=Gelt, Joe | url-status=dead | archive-url=https://web.archive.org/web/19970605221540/http://ag.arizona.edu/AZWATER/arroyo/061wthr.html | archive-date=June 5, 1997 | df=mdy-all }}</ref> Weather modification can also have the goal of preventing [[natural disaster|damaging weather]], such as [[hail]] or [[hurricanes]], from occurring; or of provoking damaging weather against an enemy, as a tactic of military or [[economic warfare]] like [[Operation Popeye]], where clouds were [[Cloud seeding|seeded]] to prolong the monsoon in Vietnam. Weather modification in warfare has been banned by the [[United Nations]] under the [[Environmental Modification Convention]].