 Rainbands exist in the periphery of tropical cyclones , which point towards the cyclone 's center of low pressure . Rainbands within tropical cyclones require ample moisture and a low level pool of cooler air . Bands located 80 kilometres ( 50 mi ) to 150 kilometres ( 93 mi ) from a cyclone 's center migrate outward . They are capable of producing heavy rains and squalls of wind , as well as tornadoes , particularly in the storm 's right @-@ front quadrant . 
