Synoptic-Scale Precursors to Tropical Cyclone Rapid Intensification in the Atlantic Basin

Table 2

Events per cluster using Ward’s minimum variance method. RI’s resulted in 4 clusters, while non-RI’s resulted in 8.

Cluster	RI	Non-RI
1	27	39
2	28	25
3	15	33
4	6	35
5	—	24
6	—	29
7	—	43
8	—	37