Satellite images from two NASA satellites were combined to create a full picture of Tropical Storm Leslie and Hurricane Michael spinning in the Atlantic Ocean. Imagery from Aqua and Terra satellites showed Leslie now past Bermuda and Michael in the north central Atlantic, and Leslie is much larger than the smaller, more powerful Michael.
On 1 August, The American Red Cross launched a free iPhone and Android application, the “Hurricane App”. It includes features such as emergency checklists, weather updates, shelter locaters and a flashlight.
NASA's TRMM satellite passed over the hurricanes that are passing over the Eastern Pacific Ocean: Emilia and Daniel. In pinpointed the intensity of the rainfall within each storm, the data reveals their power. Emilia is dropping rain at a greater rate than Daniel according to satellite data.
Effective on May 15, 2012, the US National Oceanic and Atmospheric Administration (NOAA) is making a modification to the Saffir-Simpson Hurricane Wind Scale, which is being used as a standard to measure hurricane intensity. The change broadens the Category 4 wind speed range by one mile per hour (mph) at each end of the range, yielding a new range of 130-156 mph.
After a two-week period without any named storms, the 2011 Atlantic hurricane season revived in late October with the arrival of Hurricane Rina. The storm, which began as a tropical depression on October 23 in the western Caribbean, is adding misery and destruction to a region that has been battered by heavy rain and flooding events.
During the first two weeks of September, and the peak of the Atlantic Hurricane season, NASA satellites were keeping tabs on a number of tropical systems. NASA’s Aqua, Terra, EO-1 and Tropical Rainfall Measuring Mission (TRMM) satellites provided rainfall rates, cloud height, cloud temperature, sea surface temperatures, and extent of cloud cover throughout the life of all the tropical cyclones.