Harmonic Analysis of the Spatiotemporal Pattern of Thunderstorms in Iran (1961–2010)

Table 6

Descriptive statistics for regions influenced by Iran’s thunderstorms based on cluster analysis.

Index	Frequency of the region which had few thunderstorms and high coefficient of variation (region 1)	Frequency of the region which had a mid-number of thunderstorms and low coefficient of variation (region 2)	Frequency of the region which had a great number of thunderstorms and low coefficient of variation (region 3)
Mean	5.3	10.3	20.6
Standard	0.8	2	3.8
Coefficient	25.6	19.8	12.6
Maximum	6.9	15.7	31.2
Minimum	2.8	6.9	15.8
Skewness	0. 3	0.5	−0.02
Kurtosis	2	2.6	2.5
Range	4	8.8	15.4
Median	5.3	10	19.4