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

Table 1

Thunderstorm’s code and its description (source: WMO code 4677¹).

Code	Description
17	Thunderstorm, but no precipitation at the time of observation
29	Thunderstorm (with or without precipitation) during the preceding hour but not at the time of observation
95	Thunderstorm, slight or moderate, without hail, but with rain and/or snow at the time of observation
96	Thunderstorm, slight or moderate, with hail at time of observation.
97	Thunderstorm, heavy, without hail, but with rain and/or snow at time of observation
98	Thunderstorm combined with dust/sandstorm at time of observation
99	Thunderstorm, heavy with hail at time of observation