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Development of a meteorological forecast for snow accumulation on transmission lines

  • Tatsuhito Ito (a1), Masaru Yamaoka (a1), Hisayuki Ohura (a1), Takashi Taniguchi (a2) and Gorow Wakahama (a3)...

Abstract

In Hokkaido we have often experienced hazardous accidents, such as tower collapses and conductor breakage, caused by wet-snow accretion on transmission lines, and over many years have developed countermeasures for wet-snow accretion. Recently we have been developing a system to forecast areas where snow accretion may occur. We used the southern part of Hokkaido, divided into 5 km × 5 km meshes, as a forecast area; our predictions were hourly, 3–24 hours in advance. A method of predicting meteorological data which forms an important part of the system predicts three elements which influence wet-snow accretion: air temperature, precipitation, and wind direction and speed. We used an interpolation for predicting temperature and precipitation and a one-level, mesoscale model for diagnosing surface winds for wind direction and speed. By applying the method to many examples of wet-snow accretion, we checked the prediction of weather elements.

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Copyright

References

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Mass, C.F. Dempsey, D.P. 1985 A one–level, mesoscale model for diagnosing surface winds in mountainous and coastal regions. Mon. Weather Rev., 113(7), 12111227.
Nagasawa, S. Okamoto, S. Umeda, S. Ooishi, Y. Ootaki, Α Shiozawa, Κ 1984 Studies on prediction in complex terrain (I). Wind field model. J. Jpn Soc. Air Pollut., 19(2), 149158.

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