Standards

Oral

397877 - North Dakota Hail Suppression Operations in the Context of ASCE Standard 39-15

Tuesday, June 5
10:30 AM - 12:00 PM
Location: Skyway Room

Airborne cloud seeding for hail suppression has been conducted continuously during the summer months in parts of North Dakota since 1961. Currently, the North Dakota Cloud Modification Project (NDCMP) covers more than 11,500 mi2 over seven counties in the western part of the state. The primary scientific concept for hail suppression seeding on the NDCMP is “beneficial competition”, which aims to increase the concentration of hail embryos in the storm, enhancing competition for the available supercooled water in the cloud and reducing the size of the hailstones. This is accomplished by seeding with silver iodide (AgI) complexes through wing-mounted ice nucleus generators, burn-in-place or ejectable AgI flares, or pelletized dry ice. Evaluations of the effectiveness of hail suppression cloud seeding in North Dakota indicate a 45 percent reduction in crop-hail losses and $3.7 million of crop value saved per year. When combined with benefits from additional rainfall, total direct benefits to agriculture each year range from $12 million - $19.7 million. This paper will review North Dakota cloud seeding operations alongside the guidelines for operational hail suppression programs, ASCE Standard 39-15.

Darin Langerud


North Dakota Atmospheric Research Board

Presentation(s):

Send Email for Darin Langerud


Assets

397877 - North Dakota Hail Suppression Operations in the Context of ASCE Standard 39-15



Attendees who have favorited this

Please enter your access key

The asset you are trying to access is locked. Please enter your access key to unlock.

Send Email for North Dakota Hail Suppression Operations in the Context of ASCE Standard 39-15