Here’s a cool video on YouTube from NASA.gov which shows the progression of rainfall along the path of Hurricane Matthew. This animation shows the amount of rainfall dropped by Hurricane Matthew over the life and track of the storm/ IMERG real time data covering the period from Sept. 28 through Oct. 10, 2016 show rainfall from Hurricane Matthew before and after its interaction with a frontal boundary. Matthew caused extreme rainfall in North Carolina resulting in over 20 inches (508 mm) of rain.  You can also see the rainfall over the steep terrain of Haiti blow up.  Note how early in the storm most of the rain was to the east of the track but later as it got close to the US, more of the rain was seen to the north of the storm and inland.
Credits: NASA/JAXA, Hal Pierce