Table 1: Summary of number, life cycle duration and maximum extension of the Ocean and Continent MCS during 2003 Boreal seasons.

Boreal SeasonNumber of MCSMCS life cycle duration (hours)MCS maximum extension (103 km2)

Winter (DJF)363112.19.442.026.4
Spring (MAM)264010.78.940.829.6
Summer (JJA)495114.511.486.352.6
Autumn (SON)506911.611.252.347.4
Annual average*16119112.210.255.439.0

*In case of number of MCS, the annual value corresponds to the total number of systems.