Figure 3 shows the electric field measured at the surface during three thunderstorms which occurred on 11 May 2009, 6 May 2009, and 12 May 2009, respectively.
In this paper, we report our observations of surface electric field and Maxwell current density made at Kharagpur (22.31°N, 87.31°E) in Eastern India, beneath three thunderstorms that occurred during the pre-monsoon season of 2009.
In this paper, we report observations made during three short-duration thunderstorms occurred in this region with very high peak flash rates (about 80 flashes per minute).
Conditions of strong synoptically generated wind are considered as well as days on which thunderstorms occurred.
Severe thunderstorms occurred over parts of the southern states, with at least three tornadoes touching down in Louisiana.
A massive cluster of thunderstorms occurred on July 11 , 2004 with large hail and over 100 mm of rain reported within the space of an hour in many places.
Across northwestern Arizona and Nevada, heavy showers and thunderstorms occurred.
An extension of the Bermuda high (a centre of high atmospheric pressure that develops over the Atlantic Ocean) dominates the southeastern third of the United States, and, while thunderstorms occur frequently in the warm, moist air, they seldom become severe.
As a very rough estimate, about 100,000 thunderstorms occur in the United States each year.
Maximum thunderstorm activity in the Northern and Southern Hemispheres is offset by approximately six months, with most Northern Hemisphere thunderstorms occurring between May and September and in the Southern Hemisphere between November and March.
Thunderstorms occur frequently during the summer.
