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Long-term observation of winter lightning has been conducted on the Japan Sea Coast since 1978. From the various kind of observation, the result of the lightning current measured by the automatic lightning current recording system are reported.Winter lightning has a wide variety of stroke current waves; pulsive, bipolar and long-duration current.The statistical properties of winter lightning current will be presented for the peak, the front duration, the tail duration and electric charge.

To clarify the &hara&te~stics of lightning on the coast of the Sea of Japan in winter season, the current w a v~~o r m and the pro~ression of lightning discharge to a high stack were observed. Observation results from 1989 to 1994 show that ; (1) There are two types of lightning ne with large currents and strong luminosity in the ~ightning path, and the other with small currents of long duration and weak luminosity of lightning path. (2) The parameters of ligh~ning currents of the two types of discharges are quite different. (3) There is a quantitative correlation between the change of luminosity in a lightning path and the~i~htning currentwaveform.

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