Surface electric measurements obtained beneath thunderstorms with almost similar characteristics at a station located close to the Himalayan foothills in northeastern India have been analyzed. All these thunderstorms had some similar features - occurred after midnight and lasted for a short duration of less than an hour, and an active stage of these thunderstorms lasted for 10 to 25 min. All these thunderstorms exhibited very high peak flash rates ranging from 40 to 80 flashes per minute during the active stage. A lightning jump of about 65 flashes per minute (fpm) was observed during two occurrences of these thunderstorms. Surprisingly, in spite of very high peak lightning flash rates and lightning jumps, no severe weather phenomena were observed at the ground during these thunderstorms. The formation of such small duration thunderstorms with very high lightning flash rates is attributed to the conversion of moisture in the valley during nighttime.