Weather Modification has been happening since at least 1961
The all caps are not mine.
https://wikileaks.org/plusd/cables/1977STATE223123_c.html
PROJECT STORMFURY: THE HURRICANE SEEDING EXPERIMENTS THAT EVOLVED INTO PROJECT STORMFURY BEGAN IN 1961.
PROJECT STORMFURY WAS FORMALLY ESTABLISHED IN 1962, AS A COMBINED DEPARTMENT OF COMMERCE AND DEPARTMENT OF DEFENSE PROGRAM, CARRIED OUT BY WHAT IS NOW NOAA AND THE U.S. NAVY. ADDITIONAL SUPPORT OVER THE YEARS HAS COME FROM THE NATIONAL SCIENCE FOUNDATION AND FROM THE U.S. AIR FORCE, WHICH BECAME AN ACTIVE PARTNER IN THE LATE 1960'S.
IN 1973, THE DEFENSE DEPARTMENT DECIDED HURRICANE MODIFICATION WAS NOT A PRIMARY RESPONSIBILITY AND DISCONTINUED ITS JOINT SPONSORSHIP OF THE EXPERIMENT.
SINCE THEN STORMFURY HAS BEEN PRIMARILY A DEPARTMENT OF COMMERCE PROJECT, AND HAS FOCUSED MAINLY ON DEVELOPING BETTER INSIGHTS INTO THE PHYSICAL PROCESSES WHICH DRIVE HURRICANES, THROUGH COMPUTER MODELLING AND RESEARCH PROBES OF THE STORMS.
NOAA HAS ALSO USED THIS PERIOD TO IMPROVE ITS HURRICANE RESEARCH AND SEEDING CAPABILITIES.
ONLY FOUR STORMS HAVE BEEN SEEDED BY PROJECT STORMFURY:
ESTHER, SEEDED ON SEPTEMBER 16 AND 17, 1961;
BEULAH, ON AUGUST 23 AND 24, 1963;
DEBBIE, ON AUGUST 18 AND 20, 1969;
AND GINGER, ON SEPTEMBER 26 AND 28, 1971.
PERCEIVED CHANGES IN THESE STORMS AFTER SEEDING ALL FELL WITHIN THE BROAD RANGE OF NATURAL VARIABILITY CHARACTERISTIC OF HURRICANES, BUT IN NO CASE HAS A SEEDED STORM BEEN OBSERVED TO INCREASE IN STRENGTH.
BUT HURRICANE DEBBIE SHOWED RESULTS RARELY OBSERVED IN CONFIDENTIAL CONFIDENTIAL PAGE 05 STATE 223123 UNSEEDED STORMS.
AFTER SEEDING ON AUGUST 18, 1969, MAXIMUM WINDS DECREASED BY ABOUT 30 PERCENT, AND RADAR SHOWED THE EYEWALL HAD EXPANDED TO A LARGER DIAMETER SHORTLY AFTER SEEDING.
AFTER HURRICANE DEBBIE REGAINED STRENGTH ON AUGUST 19, THE STORM WAS SEEDED AGAIN ON AUGUST 20.
FOLLOWING THE SECOND SEEDING, MAXIMUM WINDS DECREASED BY ABOUT 15 PERCENT.
IN ADDITION TO ACTUAL SEEDING EXPERIMENTS, STORMFURY SCIENTISTS HAVE BEEN TESTING THEIR THEORIES ON COMPUTER MODELS OF HURRICANES – MATHEMATICAL FORMULAS CAPABLE OF SIMULATING KEY PROPERTIES OF THE BIG STORMS.
THESE TESTS INDICATE THAT SEEDING OUTSIDE THE EYEWALL DECREASES MAXIMUM WINDS IN THE MODEL HURRICANES, AND THAT SEEDING HAS LITTLE OR NO EFFECT ON THE MODEL STORM'S TRACK OR RAINFALL PRODUCTION.
THE EFFECTS OF SEEDING ARE TRANSIENT, DISAP- PEARING FROM BOTH SEEDED HURRICANES AND MODELS 12 TO 24 HOURS AFTER SEEDING.
APPROVAL FOR SEEDING A SPECIFIC HURRICANE AT A SPECIFIED TIME MUST COME FROM THE ASSOCIATE ADMINISTRATOR OF NOAA.
PREPARATIONS FOR SEEDING AND THE FINAL DECISION TO SEED ARE MADE BY SCIENTISTS FROM NOAA'S NATIONAL HURRICANE AND EXPERIMENTAL METEOROLOGY LABORATORY, IN THE FIELD.
PROJECT MANAGER FOR STORMFURY IS THE DIRECTOR OF THE WEATHER MODI- FICATION PROGRAM OFFICE OF NOAA'S ENVIRONMENTAL RESEARCH LABORATORIES.
THE DIRECTOR OF THE NATIONAL HURRICANE AND EXPERIMENTAL METEOROLOGY LABORATORY IS SCIENTIFIC DIRECTOR OF STORMFURY.
END QUOTE.
(Cyrus) VANCE
Secretary of State January 20, 1977 – April 28, 1980
Member of Scroll and Key, one of three secret societies at Yale.
https://en.wikipedia.org/wiki/Cyrus_Vance