Vol 22, No 1 (1990)

Cover Page
[Courtesy of Bruce Boe, North Dakota Cloud Modification Program (NDCMP)]
A tomadic mesoscale convective system (MCS) covers most western North Dakota as shown in this infrared satellite image recorded at OOZ 29 June 1989. The North Dakota Cloud Modification Program, an operational hail suppression project which relies on airborne seeding of developing convection, employed real-time satellite imagery to assist decision making. The coldest cloud tops (cream color, about -55"C) were associated with hail of up to 1.75 inch diameter. Though the MCS moved through the heart of one of the NDCMP operational districts, only three of the twenty-eight hail reports received came from within that district. (For more information, see paper by Boe and Jung.)