The number of thunderstorm days is probably a less exact measure of the relative intensity of thunderstorms than statistics as to the number of persons killed annually by lightning per million of the population.
After waiting some time for the erection of a spire at Philadelphia, by means of which he hoped to bring down the electricity of a thunderstorm, he conceived the idea of sending up a kite among thunder-clouds.
I knew it, it was the odour that always precedes a thunderstorm, and a nameless fear clutched at my heart.
With the exception of a narrow strip along the Canadian frontier, thunderstorm frequency is fairly high over the whole of the United States to the east of the tooth meridian.
The pursuit, too, was carried out in the midst of a tropical thunderstorm which broke at the roar of the opening cannonade, and very considerably retarded the French pursuit.
Thus the rising of the sun, a thunderstorm, an earthquake are natural "phenomena."
In company with his son, Franklin raised the kite like a common one, in the first thunderstorm, which happened in the month of June 1752.
Numerous attempts have been made to find periodic variations in thunderstorm frequency.
The north wind usually terminates with a thunderstorm or with a pampero, a cold south-west wind from the Andes which blows with great violence, causes a fall in temperature of 15° to 20°, and is most frequent from June to November - the southern winter and spring.
The rainy season begins about the end of November, usually with a heavy thunderstorm: the rain at this part of the year is the " former rain " of the Old Testament.
Some delay was occasioned by a thunderstorm; but, as this passed over, the guns opened and the Old Guard and Milhaud's cuirassiers proceeded to form up opposite to Ligny.
Von Bezold (81) in an earlier memoir presented data analogous to Steffens', seemingly accepting them as representing a true increase in thunderstorm destructiveness.
In this instance there seems little difference in the hour of maximum, the distinguishing feature being the great concentration of thunderstorm occurrence at Agustia between noon and 6 P.M.