The Global Precipitation Mission (GPM) Core Observatory captured these images of Hurricane Harvey August 27th through the 30th, 2017. At 11:45 UTC and 21:25 UTC on the 27th of August nearly two days after the storm made landfall Harvey was meandering slowly southeast at just 2 mph (~4 kph) near Victoria, Texas west of Houston. The images at this stage show rain rates derived from GPM's GMI microwave imager (outer swath) and dual-frequency precipitation radar or DPR (inner swath) overlaid on enhanced infrared data from the GOES-East satellite as well as the IMERG precipitation product. Harvey's cyclonic circulation is still quite evident in the infrared clouds, but GPM shows that the rainfall pattern is highly asymmetric with the bulk of the rain located north or east of the center. A broad area of moderate rain can be seen stretching from near Galveston Bay to north of Houston and back well to the west. Within this are embedded areas of heavy rain (red areas); the peak estimated rain rate from GPM during these overpasses was 96 mm/hr (~3.77 inches per hour). With Harvey's circulation still reaching out over the Gulf, the storm is able to draw in a continuous supply of warm moist air to sustain the large amount of rain it is producing. At 10:45 UTC and 20:25 UTC on August 28th Harvey's outer bands can be seen drenching the Louisana coastline, despite the fact that the main part of the storm still lingered over Houston, Texas. Finally, on August 30th at 10:35 UTC Harvey can be seen shortly after making landfall a second time. Approximately 10 hours later Harvey can still be seen in nearly the same location continuing to dump heavy amounts of rain across the Texas/Louisiana border.
from NASA's Scientific Visualization Studio: Most Popular
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