BOARD01023 - Laserfiche WebLink

Home Browse Search

J.O":\:U MR. SCHLEUSENER: , , this point, they couldn't prove or dis- prove that cloud seeding had any effect whatsoever on this particular snow. Now that was a few years ago. has'been derived scientifically so you can tell that cloud seeding as has an effect on it?" What that such I "I'm afraid so far as Colorado is concerned in the high plains area, there is no additional information to add to what was told you a couple of years ago. If I may go back a little bit, it amounts to this; that the Weather Bureau, along with the Army, the Navy and other armed services have participated in quite a number of experiments to try and answer this very question as to what happens when clouds are seeded. . This was reported on in a special report that came out in December, 1957, a special report to the President's Advisory Committee for Weather Control - a group composed of scientists who had as aspeci- fic job the evaluation of weather modifica- tion activity. The report, in brief, was this: that on the West Coast there is quite conclusive evidence of a precipitation in- crease on the order of ten to fifteen per- cent and this'is big enough and good enough that the chances are very, very small that this is not a real effect. However, so far as the High Plains area is concerned which could be the Denver area and eastern Colo- rado and also, I'm afraid, western Colorado at this stage of the game, evidence is not sufficient to prove an effect one way or another. AD increase could be there but it - well, let's put it this way - an in- crease could be there but the increase is not an increase of a large order of magni- tude, because if any increase is present, it is of a small order of magnitude and it is difficult to detect. At the present time there is no proof one way or the other that precipitation is either increased or decreased. SO,far as hail suppression activity is concerned it is the same ques- tion. The scientists will tell you we don't I