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Free exchange of accurate information regarding the efficacy, safety, methodology and cost-effectiveness of weather modification activities. "

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Read the Latest Industry, See Our Locations & Plan to Attend the Conference
News photo: Red Deer Advocate - (From left) Cessna 340 and King Air C90B are two of the five cloud seeding aircrafts in Alberta at the Red Deer Regional Airport. The other three are based out of Springbank Airport, west of Calgary. Photo by Mamta Lulla/Advocate staff

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Red Deer Advocate: July 29, 2024
Welcome to Canada’s Hail Alley

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Upcoming Association Meeting

April 27-30, 2021

Please note the change of meeting dates! The meeting has again been postponed due to the pandemic coronavirus outbreak.

Join us in Corpus Christi, TX 为什么youtube进不去 at the Holiday Inn Downtown Marina for the Annual Weather Modification Association Conference.

Registration information has been posted. See our Meetings page for full details. See you there!

Photo courtesy of the City of Corpus Christi.

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A few of Our Most Popular Questions

Weather Modification can be both planned, as is the case in cloud seeding, or inadvertent, for example, when pollution affects visibility. Planned (deliberate) weather modification is also commonly know as cloud seeding, cloud modification, or atmospheric water management.

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How Does It Work?

Cloud seeding, or commonly referred to as weather modification, is the treatment of individual clouds or cloud systems in an attempt to achieve a desired beneficial effect, including fog and hail mitigation, and additional precipitation in the form of either rain or snow. Cloud seeding is conducted from the ground or via aircraft by pyrotechnic flares and/or liquid fuel generators.  Please visit the FAQ page for more information on seeding concepts and materials.

  Frequently Asked Questions  
Is It Effective?

Yes, it can be very successful. Seeding agent and methodologies used in present day operations have been developed and refined over 60 years. Studies have shown certain clouds or stages of cloud development are susceptible to seeding while others are not. Various analysis show that cloud seeding technologies can increase area-wide seasonal precipitation by 5-15% and suppress damaging hail by 25-75% when effectively applied to suitable clouds. Advances in radar data processing and evaluation techniques are helping to provide additional insight into the effectiveness of cloud seeding.

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Is it Environmentally Safe?

Published scientific literature clearly shows no environmentally harmful effects arising from cloud seeding with silver iodide (AgI) aerosols have been observed, nor would they be expected to occur. Based on this work, the WMA finds silver iodide is environmentally safe as it is currently being used in the conduct of cloud seeding programs. Click the link below to see the complete WMA Environmental Impact Statement on this topic and for a bibliography of accredited sources.

  Download Environmental Statement 

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The Industry's Best Meteorologists, Pilots, Scientists & Researchers
Frank McDonough

Frank McDonough

PRESIDENT

Frank McDonough has been a research and operational meteorologist for the past 25 years. His primary research interests are mountain meteorology, winter storms, and the small-scale structures of subfreezing clouds and precipitation. Frank serves as the program manager for the cloud seeding team at the Desert Research Institute (DRI) and manages research and operational cloud seeding projects in the Rocky Mountains and Sierra Nevada. Prior to working at DRI, while at the National Center for Atmospheric Research (NCAR), he worked on several aircraft icing research programs and co-developed the National Weather Service’s operational in-flight icing products.

Mark Schneider

Mark Schneider

PRESIDENT-ELECT

Mark Schneider is Chief Meteorologist for the North Dakota Atmospheric Resource Board and began working weather modification field programs in 1995. Throughout the years Mark has participated in summer cloud seeding programs in North Dakota and Oklahoma and winter operations in California. As a WMA Certified Manager, Mark was recently elected to the position of Certification Committee Chair and serves as Secretary/Treasurer for the North American Weather Modification Council.

Derek Blestrud

Derek Blestrud

SECRETARY

Derek Blestrud has been involved in weather modification since 2003 and is currently a Senior Atmospheric Scientist for the Idaho Power Company. His primary focus is on the research and operations of cloud seeding in southern Idaho. He was heavily involved in the success of the SNOWIE (Seeded and Natural Orographic Wintertime Clouds: the Idaho Experiment) research project. Derek has worked on cloud seeding projects in North Dakota, Wyoming, India, Alberta, and Idaho. He is currently serving as Past President for the North American Weather Modification Council.

Paul Kucera - WMA Secretary

Paul Kucera

PAST PRESIDENT

Dr. Paul Kucera has over 25 years of field experience in weather modification assessment and precipitation research. As a Project Scientist at University Corporation for Atmospheric Research, he has led airborne and ground research operations, radar networking, education and outreach, evaluation of experimental forecasts, and assessment of cloud seeding programs for multiple international clients. He currently is Chair of the CGMS International Precipitation Working Group and a member of the American Geophysical Union Committee on Precipitation.

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Why Does It Matter? What are the Benefits?

WMA Operator and Manager certifications are based on criteria that are intended to ensure the meteorological and technical understanding, as well as commitment to ethical principles, of those conducting and managing cloud seeding operations. These principles are outlined in the ASCE guidelines for weather modification. The utilization of certified operators and managers for seeding programs is of benefit to the public, both in helping to recognize and take advantage of seeding opportunities during storm events, as well as recognizing and responding to potentially hazardous situations where seeding may not be desirable. Certification is based on criteria that include education, experience in the field of weather modification, and in-depth knowledge of the corresponding meteorological processes.

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