| Table 1: Summary of number, life cycle duration and maximum extension of the Ocean and Continent MCS during 2003 Boreal seasons. |
| | Boreal Season | Number of MCS | MCS life cycle duration (hours) | MCS maximum extension (103 km2) | | Continent | Ocean | Continent | Ocean | Continent | Ocean |
| | Winter (DJF) | 36 | 31 | 12.1 | 9.4 | 42.0 | 26.4 | | Spring (MAM) | 26 | 40 | 10.7 | 8.9 | 40.8 | 29.6 | | Summer (JJA) | 49 | 51 | 14.5 | 11.4 | 86.3 | 52.6 | | Autumn (SON) | 50 | 69 | 11.6 | 11.2 | 52.3 | 47.4 | | Annual average* | 161 | 191 | 12.2 | 10.2 | 55.4 | 39.0 |
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*In case of number of MCS, the annual value corresponds to the total number of systems.
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