The Fujiwhara effect describes how these phenomenon can orbit about each other and sometimes merge. The center of these phenomenon usually exhibit the stadium effect, and these phenomena can also cause water to pile up on coastlines to higher than sea level. The severity of these phenomena is measured on the Saffir-Simpson 
The Fujiwhara effect describes how these phenomenon can orbit about each other and sometimes merge. The center of these phenomenon usually exhibit the stadium effect, and these phenomena can also cause water to pile up on coastlines to higher than sea level. The severity of these phenomena is measured on the Saffir-Simpson Scale, and notable features of these occurrences include storm surges and eyes. For 10 points, name these low-pressure storm systems that include ones named Wilma and Katrina.
The Fujiwhara effect describes how these phenomenon can orbit about each other and sometimes merge.
{Tropical cyclone} [or {hurricane} or {typhoon}]