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Unformatted text preview: This can happen numerous times, yielding softball-sized hailstones Rime- Occurs when supercooled cloud droplets deposit on objects whose temperatures are below freezing. Precipitation Measurement- rain gauge collecting funnel brings rain into tube 1/10 th it's size-Standard, tipping bucket or weighing gauge Weather radar-Algorithms to calculate storm totals Snowfall measurement inaccurate at best-Lots of drifting and compaction Cloud Seeding encourage growth of ice crystals by dropping dry ice or silver iodide into cloud with supercooled water-Primarily for rainfall enhancement-Used in vail and Beaver Creek ski areas-Fog/Cloud dispersal seeding causes ice crystal formation, which then settle out, leaving openings-Hail suppression extensive seeding leads to millions of ice crystals which compete for the supercooled water drops Frost prevention to save crops-Water sprinklers, orchard heaters, air mixing techniques...
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- Spring '08