As described in the patent, there are several "advantages", for the existence and application of this technology:

• the invention is considered to be practical, with immediate adaptation and little investment is required; and
• the potential to save of billions of dollars in storm damages and of lives by controlling hurricanes.
  

As one as expect, whether this invention is advantageous depends on the party applying the technology and their intended purpose. Remember, any tool can be used as a weapon.

Below is a list composed of some of the patents that describe abilities to modify weather:

• U.S. Patent No.: 4,470,544 - discloses cooling of the surface of the sea in the summer time by mixing surface water with cooler deep water, this being achieved by pumping water from a lower level of the sea to the upper level. This causes reduction in the heat lost during the summer Whereby the amount of heat stored in the body of water during the summer is increased causing wintertime modification of the weather over the continental arid zone.
  
• U.S. Patent No.: 5,984,239 - describes Satellite Weather Modification System. It is an aerospace system designed to harness solar energy to modify the Earth’s weather. This invention involves placing at least one million satellites in a planetary orbit, each satellite being capable of reflecting solar radiation.
• U.S. Patent No.: 6,315,213 - discloses a method for artificially modifying the Weather by seeding rain clouds of a storm with a suitable cross-linked aqueous polymer. The super absorbent polymer is dispersed into the cloud and the wind of the storm agitates the mixture causing the polymer to absorb the rain. This reaction forms a gelatinous substance which precipitates to the surface below, thus, diminishing the velocity of the clouds.
  

Project Popeye was a highly classified weather modification program in Southeast Asia during 1967–1972. The objective of the program was to produce sufficient rainfall along these lines of communication to interdict or at least interfere with truck traffic between North and South Vietnam.

A test phase of Project Popeye was approved by State and Defense and conducted during October 1966 in a strip of the Lao Panhandle generally east of the Bolovens Plateau in the valley of the Se Kong River. The test was conducted without consultation with Lao authorities (but with Ambassador Sullivan’s knowledge and concurrence).

During the test phase, more than 50 cloud seeding experiments were conducted. The results are viewed by DOD as outstandingly successful.

• 82% of the clouds seeded produced rain within a brief period after seeding—a percentage appreciably higher than normal expectation in the absence of seeding.
• The amount of rainfall induced by seeding is believed to have been sufficient to have contributed substantially to rendering vehicular routes in this area inoperable. Since the end of the rainy season, the communists have failed to undertake route repairs and there has been no vehicular traffic.
• In one instance, the rainfall continued as the cloud moved eastward across the Vietnam border and inundated a U.S. Special Forces camp with nine inches of rain in four hours.
• DOD scientists consider that the experiment demonstrated a capacity to raise and maintain rainfall under controlled conditions to the level at which the land is saturated over a sustained period, slowing movement on foot and rendering the operation of vehicles impracticable.

The experiments were deemed undeniably successful, indicating that, at least under weather and terrain conditions such as those involved, the U.S. Government has realized a capability of significant weather modification. If anything, the tests were “too successful”—neither the volume of induced rainfall nor the extent of area affected can be precisely predicted (Department of State - Office of the Historian, 1967).

Project Stormfury was an attempt to weaken tropical cyclones by flying aircraft into them and seeding with silver iodide.

The project was run by the United States Government from 1962 to 1983.The hypothesis was that the silver iodide would cause supercooled water in the storm to freeze, disrupting the inner structure of the hurricane. This led to the seeding of several Atlantic hurricanes. However, it was later shown that this hypothesis was incorrect. In reality, it was determined most hurricanes do not contain enough supercooled water for cloud seeding to be effective. Additionally, researchers found that unseeded hurricanes often undergo the same structural changes that were expected from seeded hurricanes. This finding called Stormfury’s successes into question, as the changes reported now had a natural explanation.

The last experimental flight was flown in 1971, due to a lack of candidate storms and a changeover in NOAA’s fleet. More than a decade after the last modification experiment, Project Stormfury was officially canceled. Although a failure in its goal of reducing the destructiveness of hurricanes, Project Stormfury was not without merit. The observational data and storm lifecycle research generated by Stormfury helped improve meteorologists’ ability to forecast the movement and intensity of future hurricanes.

A number of government agencies have developed plans for research and operational programs in weather and climate modification. Here is a report from 1966, in which various agencies expressed interest in the ability to modify the weather. In 2015, the National Academy of Sciences conducted a 21-month geoengineering study, which happened be funded by the "U.S Intelligence community", also known as the Central Intelligence Agency (National Academy of Sciences, 2015). Below is a video of John Brennan, former CIA director from March 2013 to January 2017, speaking about stratospheric aerosol injection (SAI), commonly referred to as "chemtrails", at the Council on Foreign Relations.

Scientists at Helmholtz Centre for Ocean Research (Kiel, Germany) conducted a study where they evaluated effectiveness and risks of different geoengineering techniques, such as SRM (solar radiation management), afforestation, artificial ocean upwelling, ocean iron fertilization and ocean alkalinization.

The researchers discovered that even when applied continuously and at scales as large as currently deemed possible, all methods are, individually, either relatively ineffective
with limited (o8%) warming reductions, or they have potentially severe side effects and cannot be stopped without causing rapid climate change (Keller, Feng and Oschlies, 2014).

To assess their true potential and verify their side effects, such interventions require full-scale experiments that may have long-term and possibly compromise the very planetary mechanisms and ecosystems we’re trying to save.

In the photos below, several abnormal cloud formations with a seemingly unnatural origin, containing straight lines and 90° angles, can be observed.

Based on the information aforementioned, toxic materials, heavy metals, and harmful chemicals are able to be positioned in the atmosphere of the planet. Many speculate that these particles may be manipulated by powerful radio frequency signals, in which a strange impact on clouds can be observed. In addition, it is claimed that these square clouds are created via electrically conductive heavy metal nanoparticles (that are constantly being sprayed into our atmosphere by the the geoengineers) which are able to be manipulated with the global grid of radio frequency transmitters. Some suggest that these radio frequencies have originated from ionospheric heaters like HAARP (High Frequency Active Auroral Research Program) in Gakona, Alaska, the most notable U.S. geoengineering facility. HAARP wasscheduled for shut down by the U.S. Air Force in May, 2014. There are many other transmission installations around the world, some officially known and others completely secret.

The United States Federal government has been involved for over 60 years in a number of aspects of weather modification, through activities of both the Congress and executive branch. Since 1947, weather modification bills pertained to research support, operations, policy studies, regulations, liabilities, activity reporting, establishment of panels and committees, and international concerns have been introduced in the Congress. There have been hearings on many of these proposed measures, and oversight hearings have also been conducted on pertinent ongoing programs. In the 750-page document below, various topics regarding weather modification are discussed, including but not limited to:

• Introduction and summary of issues
  
• History of weather modification
  
• Technology of planned weather modification, such as;
  
  • Precipitation augmentation
    
  • Hail suppression
    
  • Dissipation of fog and stratus clouds
    
  • Lightning suppression
    
  • Modification of severe storms
    
• Inadvertent weather and climate modification
  
• Federal activities in weather modification
  
• State and local activities in weather modification
  
• Private, foreign, and international activities in weather modification
  
• Ecological effects of weather modification
  

Department of State - Office of the Historian. (1967). Foreign Relations of the United States, 1964–1968, Volume XXVIII, Laos - Office of the Historian. [online] Available at: https://history.state.gov/historicaldocuments/frus1964-68v28/d274#fnref:1.5.4.4.14.336.7.6 [Accessed 12 Sep. 2017].

Keller, D., Feng, E. and Oschlies, A. (2014). Potential climate engineering effectiveness and side effects during a high carbon dioxide-emission scenario. Nature Communications, 5. https://doi.org/10.1038/ncomms4304

Wigington, D. (2016). Is Climate Engineering Real? Square Cloud Formations Are Undeniable Proof. [online] Geoengineering Watch. Available at: http://www.geoengineeringwatch.org/is-climate-engineering-real-square-cloud-formations-are-undeniable-proof/ [Accessed 12 Sep. 2017].