NASA analyzed rainfall data from slow-moving storms that triggered flash floods over parts of central Maryland and caused devastating flooding in historic Ellicott City, Maryland. A slow-moving line of heavy thunderstorms dumped as much as 6 to 7 inches of rain in about two hours' time during the evening of Saturday, July 30, over parts of Howard County in central Maryland, resulting in severe local flash flooding. The hardest hit area was the historic town of Ellicott City, where two people were trapped in their cars and drowned. The town suffered substantial damage to many buildings

Most of the Hawaiian Islands were spared serious damage from tropical storm Darby. The location of Darby's track through the Hawaiian Islands resulted in the islands of Hawaii and Oahu being the most affected. Flash flooding was common on Oahu due to a reported 177.8 mm (7 inches) of rain drenching the island. Interstate H-1 was flooded in some locations. Lightning damage was reported in Kaneohe on the windward side of Oahu. Estimates of rainfall accompanying tropical storm Darby were produced using NASA's Integrated Multi-satellitE Retrievals for GPM (IMERG) data. These IMERG rainfall

Tropical storm Darby has caused some heavy rainfall in the Hawaiian Islands since hitting the big island (Hawaii) on Saturday July 23, 2016. After hitting the big island Darby passed to the south of Molokai and Maui. Rain falling at a rate of 25.4 mm (1 inch) to 50.8 mm (2 inches) per hour was reported on the island of Oahu as Darby passed to the southwest of the island. The National Weather Service office in Honolulu reported that parts of Interstate H-1 that serves the southern side of Oahu was closed due to flooding on Sunday night. Darby is affecting northern Kaui today. The GPM core

The eastern Pacific Ocean continues to show that it's environment is favorable for the birth of tropical cyclones. Tropical Depression EIGHT-E (TD08E) quickly followed tropical storm FRANK as the latest example of tropical cyclogenesis in the eastern Pacific Ocean. The GPM core observatory satellite examined TD08E when it flew directly above on July 22, 2016 at 0931 UTC. At that time maximum sustained winds were only estimated to be about 30 kts (34.5 mph). Rainfall was examined in TD08E using data collected by GPM's Microwave Imager (GMI) and Dual-Frequency Precipitation Radar (DPR)

The eastern Pacific Ocean continues to spawn tropical cyclones. Seven named tropical cyclones have already formed in the Eastern Pacific ocean this year. The National Hurricane Center (NHC) has indicated that another tropical cyclone is likely to form in a broad area of low pressure southwest of Acapulco, Mexico. The GPM core observatory satellite flew directly above this increasingly organized stormy area on July 21, 2016 at 0851Z. GPM found that powerful thunderstorms in that area contained intense showers. Rain was measured by GPM's Dual-Frequency Precipitation Radar (DPR) instrument