Rain Fall Results at www.japanese-home-gardens.com

Oregon.—In this state, with an annual average of 26.31 inches, winter is the wet season with a maximum monthly value of 3.84 inches in December. July and August are the driest months, each with 0.42 inch. Pacific cyclones are more intense, and reach the coast farther to the south, during the colder months. Oregon's rain fall resultsfall results, then, from a combination of cyclonic rain fall results and orographic rain fall results produced by lifting over the Cascades and Coast Range. Orographic lifting is responsible for high average annual values observed at some western stations, for instance at Glenora, where 129.47 inches fall in an average year. The central and eastern portions, in the rain fall results shadow of the Cascades, are characterized by far lower annual amounts; at Andrews only 7.02 inches fall in a normal year.

An effort was made to periment in a representative sampling of weather iditions, not just under conditions favorable • natural rain fall results. In most of the cases it was md that the clouds were modified, and in some ;es light snow or rain fall results was caused to fall from cloud, but little or no rain fall results which could be ributed to seeding actually reached the ground, rther tests in Australia and Canada showed t precipitation reached the ground in only a ction of the cases studied. Indirect evidence indicates that in some cases quantity of rain fall resultsfall was increased or the rain fall results cipitated sooner than would have been the case hout artificial treatment by dry ice.

Only in such clouds can seeding agents like dry ice and silver iodide precipitate ice crystals (snow). The exact conditions under which the snow particles will grow to sizes large enough to fall and not remain suspended like the original water droplets, are still only partly understood. To yield appreciable quantities of rain fall results the cloud must also be of the Shower type, that is—cumuli-form. Many claims of heavy rain fall resultsfall have been made where there is little doubt that the rain fall resultsfall would have occurred in the absence of human intervention. On the other hand, it is possible that rain fall resultsfall amounts have been increased by seeding supercooled clouds, although conclusive proof has not been presented.