NASA’s Global Precipitation Measurement Mission or GPM core satellite captured Hurricane Matthew in 3-D as it made landfall on Haiti and as it travelled up to the Florida coast. GPM flew directly over the storm several times between October 2 - October 6, 2016. The most recent view on October 6 reveals massive amounts of rainfall being produced by the storm as it approaches Florida.
The GPM core satellite carries two instruments that show the location and intensity of rain and snow, which defines a crucial part of the storm structure – and how it will behave. The GPM Microwave Imager sees through the tops of clouds to observe how much and where precipitation occurs, and the Dual-frequency Precipitation Radar observes precise details of precipitation in 3-dimensions.
NASA satellite data was used to provide estimates of Hurricane Matthew's heavy precipitation over the course of seven days. NASA estimates were created from a combination of space-borne passive microwave sensors and showed very heavy rainfall amounts in Matthew's track and over Hispaniola.
NASA's Integrated Multi-satellitE Retrievals for GPM or IMERG product is used to make estimates of precipitation from a combination of space-borne passive microwave sensors, including the GMI microwave sensor onboard the Global Precipitation Measurement mission or GPM satellite, and geostationary IR (infrared) data.
This data visualization shows IMERG rainfall estimates for the period from Sept. 29 to Oct. 5, 2016 for the northeastern Caribbean in association with the passage of Hurricane Matthew indicated by storm symbols.
Beginning at 00 UTC on the Sept. 30 rainfall totals associated with Matthew are in excess of 10 inches all along its track, reaching upwards of 25 inches when the storm was intensifying on the Sept. 30.
Over land, IMERGE shows wide areas of between 15 to 20 inches of rain all along the southern coasts of Haiti and the Dominican Republic on the island of Hispaniola. Rainfall amounts on the right side of Matthew are higher where the storm's counter-clockwise cyclonic circulation interacted with the island's topography. A separate but nearby cluster of thunderstorms on the eastern side of Matthew also contributed to the rainfall totals there.
GCMD keywords can be found on the Internet with the following citation:
Olsen, L.M., G. Major, K. Shein, J. Scialdone, S. Ritz, T. Stevens, M. Morahan, A. Aleman, R. Vogel, S. Leicester, H. Weir, M. Meaux, S. Grebas, C.Solomon, M. Holland, T. Northcutt, R. A. Restrepo, R. Bilodeau, 2013. NASA/Global Change Master Directory (GCMD) Earth Science Keywords. Version 22.214.171.124.0