NASA's IMERG data from Aug. 8 to Aug. 15, 2016 showed over 20 inches (508 mm) of rainfall was estimated in large areas of southeastern Louisiana and extreme southern Mississippi. Even greater rainfall totals of 30 inches (762 mm) were indicated in a small area of Louisiana west of Lake Pontchartrain. Credits: NASA/JAXA, Hal Pierce

NASA Analyzes Weather Event That Caused Deadly Louisiana Flooding

Record-setting rainfall and flooding in southern Louisiana have been calculated at NASA with data from satellites. An extremely severe rainfall event hit the states of Louisiana and southern Mississippi when a very slow moving low pressure system continuously pulled tropical moisture from the Gulf of Mexico. Measurements by the Global Precipitation Measurement or GPM mission…

IMERG was also used to estimate rainfall totals for the period from July 30 at 4 p.m. EDT (8 p.m. UTC) to July 31 at 6 a.m. EDT (10 a.m. UTC). Rainfall totals across central Maryland were on the order of more than 70 mm (about 3 inches, shown in brown). The white crosses denote the location of Ellicott City, Md. CREDIT
NASA/JAXA/Hal Pierce

NASA analyses Maryland storm system that caused flooding

NASA looks at historic flooding from slow-moving Maryland storms 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…


El Niño made a nuisance of itself in 2015

From NOAA HEADQUARTERS Record ‘nuisance flooding’ in many US cities tied to Pacific weather pattern The frequency of nuisance tidal flooding in many U.S. cities increased as predicted for the 2015 meteorological year, from May 2015 to April 2016, according to a new NOAA report. In some cities, the days of nuisance flooding exceeded trends…